author | Mikael Laine <mikael.laine@ixonos.com> |
Fri, 29 Jan 2010 14:08:33 +0200 | |
changeset 0 | 951a5db380a0 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2010 Ixonos Plc. |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - Initial contribution |
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* |
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* Contributors: |
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* Ixonos Plc |
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* |
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* Description: |
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Committing the Video Editor package under the Eclipse Public License
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* |
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*/ |
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//----IMAAMI---- |
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//************************************************************************* |
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//CDCIETD.cpp |
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//Version 2.00 |
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// |
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//Contains: |
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// CDCIETD |
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// Display specific color contrast enhancement, |
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// Image Enhancement for Transflective Displays version 2, |
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// IETD 2. |
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// |
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//History: |
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// 23.10.2003 version 2.00 created using existing IMAAMI IETD |
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//************************************************************************* |
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// Include Files |
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#include <e32std.h> // The basic definitions |
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#include <fbs.h> // For FBS bitmap |
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#include "DCIetd.h" // The DCIetd class |
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// MEMBER FUNCTIONS |
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//============================================================================= |
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/* |
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----------------------------------------------------------------------------- |
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CDCIetd |
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Constructor |
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Default constructor, initializes member variables to initial values |
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Return Values: none |
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----------------------------------------------------------------------------- |
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*/ |
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CDCIetd::CDCIetd() |
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{ |
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// Set default values for parameters (from init file) |
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iParameters.aWhitePixels = WhitePixels; |
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iParameters.aBlackPixels = BlackPixels; |
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iParameters.aStretchLimit = StretchLimit; |
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iParameters.aSaturationGain = SaturationGain; |
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iParameters.aBitLimit = BitLimit; |
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iParameters.aWBC = WBC; |
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iParameters.aDBC = DBC; |
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} |
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/* |
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----------------------------------------------------------------------------- |
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CDCIetd |
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NewLC |
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Factory function to instantiate the class. |
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This function leaves the class pointer to the cleanup stack |
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May leave with KErrNoMemory if no memory available |
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Return Values: CDCIetd* self: pointer to the class instance |
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----------------------------------------------------------------------------- |
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*/ |
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CDCIetd* CDCIetd::NewLC() |
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{ |
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CDCIetd* self = new (ELeave) CDCIetd(); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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return self; |
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} |
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/* |
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----------------------------------------------------------------------------- |
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CDCIetd |
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NewL |
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Factory function to instantiate the class. |
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May leave with KErrNoMemory if no memory available |
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Return Values: CDCIetd* self: pointer to the class instance |
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----------------------------------------------------------------------------- |
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*/ |
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CDCIetd* CDCIetd::NewL() |
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{ |
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CDCIetd* self = CDCIetd::NewLC(); |
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CleanupStack::Pop(); |
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return self; |
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} |
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|
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/* |
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----------------------------------------------------------------------------- |
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|
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CDCIetd |
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ConstructL |
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Second phase constructor. Does nothing at the moment |
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|
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Return Values: none |
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|
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----------------------------------------------------------------------------- |
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*/ |
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void CDCIetd::ConstructL() |
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{ |
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// This function is intentionally left blank. |
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} |
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/* |
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----------------------------------------------------------------------------- |
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CDCIetd |
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Destructor |
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|
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Return Values: none |
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----------------------------------------------------------------------------- |
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*/ |
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CDCIetd::~CDCIetd() |
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{ |
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// This function is intentionally left blank. |
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} |
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|
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/* |
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----------------------------------------------------------------------------- |
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CDCIetd |
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Analyze |
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|
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Analyze image referenced by aBPtr |
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|
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Return Values: none |
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|
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----------------------------------------------------------------------------- |
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*/ |
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// Analyze image referenced by aBPtr |
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void CDCIetd::Analyze(CFbsBitmap& aBPtr) |
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{ |
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|
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//EColor16M image is needed |
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if (aBPtr.DisplayMode() != EColor16M) return; |
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|
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//Do analysis |
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GatherHistograms(aBPtr); |
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MakeMappings(); |
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} |
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|
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|
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|
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|
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/* |
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194 |
----------------------------------------------------------------------------- |
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|
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CDCIetd |
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|
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ProcessL |
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|
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Process image referenced by aImage (modify aImage). |
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201 |
May leave with KErrNoMemory if no memory available |
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|
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203 |
Return Values: none |
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|
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----------------------------------------------------------------------------- |
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*/ |
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207 |
void CDCIetd::ProcessL (CFbsBitmap& aImage) // image reference |
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{ |
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209 |
TUint r, g, b; // Color components |
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210 |
TUint lum; // Brightness estimate |
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211 |
TInt dr, dg, db; // Differences to brightness |
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212 |
TUint8* dataPtr; // Pointer to data |
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|
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//EColor16M image is needed |
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215 |
if (aImage.DisplayMode() != EColor16M) return; |
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|
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//Line Buffer and pointer to the data |
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TUint imageWidth = aImage.SizeInPixels().iWidth; |
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TUint scanLineLengthInBytes = aImage.ScanLineLength(imageWidth, aImage.DisplayMode()); |
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|
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//Allocate buffer for scanline |
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222 |
iScanLineBuffer = HBufC8::NewMaxL(scanLineLengthInBytes); |
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//Pointer to scanline |
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TPtr8 linePtr = iScanLineBuffer->Des(); |
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|
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226 |
//Step through image pixels and do stretching |
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227 |
//and saturation increase |
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228 |
//--------------------------------------------- |
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229 |
|
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//Read all lines |
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231 |
for (TInt lineNo=0; lineNo<aImage.SizeInPixels().iHeight; ++lineNo) |
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232 |
{ |
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|
233 |
//Get line |
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aImage.GetScanLine(linePtr, TPoint(0, lineNo), imageWidth, aImage.DisplayMode()); |
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235 |
//CHECK! CONST_CAST not used in every algorithm which way is better? |
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dataPtr = CONST_CAST(TUint8*, linePtr.Ptr()); |
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237 |
|
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238 |
//Step through pixels in line |
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|
239 |
for (TUint x=0; x < imageWidth; ++x) |
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240 |
{ |
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241 |
// Map color componets according to mapping LUTs |
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b = iMap[2][*dataPtr++]; |
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g = iMap[1][*dataPtr++]; |
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r = iMap[0][*dataPtr++]; |
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|
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//Compute brightness estimate |
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//lum=0.299r+0.587g+0.114b; //true Y |
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//lum=(32768+19595*r+38470*g+7471*b)>>16; //Y |
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//lum = (r+g+b)/3; //Simple approximation |
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lum=(r+(g<<1)+b)>>2; //More effective simple approximation |
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|
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//Compute componentwise differences to luminance |
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dr = r-lum; |
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dg = g-lum; |
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db = b-lum; |
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|
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//Increase differences => saturation increases. |
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//Use gain parameter for adjusting the strength of the effect. |
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b += iParameters.aSaturationGain*db/32; |
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g += iParameters.aSaturationGain*dg/32; |
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r += iParameters.aSaturationGain*dr/32; |
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|
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//Save data to same image & same pixels |
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264 |
dataPtr -= 3; |
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|
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//Limit to available dynamic range [0,255]. |
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*dataPtr++ = Limit255(b); |
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*dataPtr++ = Limit255(g); |
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*dataPtr++ = Limit255(r); |
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} |
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|
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//Save line |
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aImage.SetScanLine(linePtr, lineNo); |
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} |
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|
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//Free memory |
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delete(iScanLineBuffer); |
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iScanLineBuffer = 0; |
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} |
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|
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|
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|
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/* |
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285 |
----------------------------------------------------------------------------- |
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|
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CDCIetd |
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|
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GatherHistograms |
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|
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Gather histograms and make cumulative histogram. |
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|
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Return Values: none |
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|
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----------------------------------------------------------------------------- |
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*/ |
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void CDCIetd::GatherHistograms (const CFbsBitmap& aImage) // Pointer to the image bitmap |
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{ |
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const TUint8* dataPtr; //Pointer to data |
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TInt lineNo; //Line number |
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TUint x; //Pixel index |
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TUint color; //Color index |
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TUint count; // Number of colors in each component |
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|
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//Compute image width & allocate scan line memory |
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306 |
TUint imageWidth = aImage.SizeInPixels().iWidth; |
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TUint histScanLineLengthInBytes = aImage.ScanLineLength(imageWidth, aImage.DisplayMode()); |
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iScanLineBuffer = HBufC8::NewMaxL(histScanLineLengthInBytes); |
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|
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//Pointer to line |
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311 |
TPtr8 linePtr = iScanLineBuffer->Des(); |
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|
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//Clear histograms |
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Mem::FillZ(iHistogram, sizeof(iHistogram)); |
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315 |
|
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// Read all lines and gather histograms |
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317 |
for (lineNo=0; lineNo<aImage.SizeInPixels().iHeight; lineNo++) |
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{ |
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319 |
//Get line |
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320 |
aImage.GetScanLine(linePtr, TPoint(0, lineNo), imageWidth, aImage.DisplayMode()); |
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321 |
dataPtr = linePtr.Ptr(); |
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322 |
|
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323 |
//Step through pixels |
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Committing the Video Editor package under the Eclipse Public License
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324 |
for (x=imageWidth; x != 0; --x) |
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325 |
{ |
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326 |
++iHistogram[2][*dataPtr++]; // Increase Blue bin value |
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327 |
++iHistogram[1][*dataPtr++]; // Increase Green bin value |
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328 |
++iHistogram[0][*dataPtr++]; // Increase Red bin value |
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329 |
} |
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330 |
} |
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331 |
|
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332 |
//Make cumulative histograms & count colors in each histogram |
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333 |
for (color=0; color<3; ++color) |
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334 |
{ |
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335 |
// Count used colors |
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336 |
count=0; |
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337 |
for (x=0; x<256; ++x) |
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338 |
{ |
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339 |
if (iHistogram[color][x]>0) count++; |
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340 |
} |
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341 |
|
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342 |
// Compute increased stretch limit if a color component has less colors than iBitLimit. |
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343 |
// Otherwise use predetermined stretch limit. |
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344 |
if (count<iParameters.aBitLimit) |
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345 |
iReducedStretchLimit[color] = (TUint8)(iParameters.aStretchLimit*count/iParameters.aBitLimit+255-255*count/iParameters.aBitLimit); |
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346 |
else |
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347 |
iReducedStretchLimit[color] = iParameters.aStretchLimit; |
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348 |
|
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349 |
//Make cumulative histogram |
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350 |
for (x=1; x<256; ++x) |
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351 |
iHistogram[color][x] += iHistogram[color][x-1]; |
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352 |
|
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353 |
} |
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354 |
|
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355 |
//Free memory |
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356 |
delete(iScanLineBuffer); |
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|
357 |
iScanLineBuffer = 0; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
358 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
359 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
360 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
361 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
362 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
363 |
/* |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
364 |
----------------------------------------------------------------------------- |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
365 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
366 |
CDCIetd |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
367 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
368 |
MakeMappings |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
369 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
370 |
Make mapping function look-up table (LUT). |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
371 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
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|
372 |
Return Values: none |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
373 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
374 |
----------------------------------------------------------------------------- |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
375 |
*/ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
376 |
void CDCIetd::MakeMappings() |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
377 |
{ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
378 |
TInt MinBins[3];// Smallest existing values in histogram |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
379 |
TInt MaxBins[3];// Largest existing values in histogram |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
380 |
TUint minBin; // Minimum of smallest existing values |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
381 |
TUint maxBin; // Maximum of largest existing values |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
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parents:
diff
changeset
|
382 |
TUint x; // Index |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
383 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
384 |
// Stretching limit variables |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
385 |
TUint minShift; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
386 |
TUint maxShift; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
387 |
TUint totalShift; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
388 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
389 |
TUint color; //Color index |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
390 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
391 |
//Step through colors |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
392 |
for (color=0; color<3; ++color) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
393 |
{ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
394 |
// Find smallest existing values in histograms, discard darkest pixels |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
395 |
// according to blackpixels parameter |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
396 |
x = 0; // Start from fist bin |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
397 |
MinBins[color] = iParameters.aBlackPixels * iHistogram[color][255]/1000; // Compute value to be found |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
398 |
while (x < 255 && (TUint)iHistogram[color][x] < MinBins[color]) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
399 |
++x; // Find from histogram |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
400 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
401 |
MinBins[color] = x; // Save bin index = start of stretching part of LUT |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
402 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
403 |
// Find largest existing values in histograms, discard brightest pixels |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
404 |
// according to whitepixels parameter |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
405 |
x = 255; // Start from last bin |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
406 |
//Compute value to be found |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
407 |
MaxBins[color] = iHistogram[color][255] - iParameters.aWhitePixels * iHistogram[color][255]/1000; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
408 |
while (x > 0 && (TUint)iHistogram[color][x] > MaxBins[color]) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
409 |
--x; // Find from histogram |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
410 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
411 |
MaxBins[color] = x; // Save bin index = end of stretching part of LUT |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
412 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
413 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
414 |
//Find minimum of all colors |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
415 |
minBin=255; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
416 |
for (color=0; color<3; color++) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
417 |
{ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
418 |
if (minBin>MinBins[color]) minBin=MinBins[color]; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
419 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
420 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
421 |
//Find maximum of all colors |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
422 |
maxBin=0; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
423 |
for (color=0; color<3; color++) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
424 |
{ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
425 |
if (maxBin<MaxBins[color]) maxBin=MaxBins[color]; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
426 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
427 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
428 |
//Adjust white and dark balance within limits given in parameters (maximum correction). |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
429 |
//0 means that largest(or smallest) of all values is used => no WBC(or DBC). |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
430 |
for (color=0; color<3; color++) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
431 |
{ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
432 |
if(maxBin-MaxBins[color]>iParameters.aWBC) MaxBins[color]=maxBin-iParameters.aWBC; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
433 |
if((MinBins[color]-minBin) > iParameters.aDBC) MinBins[color]=minBin+iParameters.aDBC; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
434 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
435 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
436 |
//Step through color components |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
437 |
for (color=0; color<3; color++) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
438 |
{ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
439 |
// If histogram has only one nonzero bin maxBin can be less than minBin. |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
440 |
// In that case change maxBin value to minBin. |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
441 |
if(MaxBins[color]<MinBins[color]) MaxBins[color]=MinBins[color]; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
442 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
443 |
// Limit stretching to narrovest histogram that can be stretched |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
444 |
if (MaxBins[color]-MinBins[color] < iReducedStretchLimit[color]) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
445 |
{ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
446 |
// Compute limiting shifts to measured values. |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
447 |
// Compute shifts for dark and bright end in relation |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
448 |
// to coresponding available space in dynamic range. |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
449 |
totalShift = iReducedStretchLimit[color]-(MaxBins[color]-MinBins[color]); |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
450 |
maxShift = totalShift*(255-MaxBins[color])/(255-(MaxBins[color]-MinBins[color])); |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
451 |
minShift = totalShift*MinBins[color]/(255-(MaxBins[color]-MinBins[color])); |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
452 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
453 |
// Shift measured values, so that stretching is limited |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
454 |
MinBins[color] -= minShift; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
455 |
MaxBins[color] += maxShift; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
456 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
457 |
// Check that dynamic range is not exceeded |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
458 |
// (Should happen only with faulty parameter values) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
459 |
if (MinBins[color]<0) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
460 |
MinBins[color]=0; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
461 |
if (MaxBins[color]>255) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
462 |
MaxBins[color]=255; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
463 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
464 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
465 |
// Set 0 mapping part of the LUT |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
466 |
for (x=0; x<=MinBins[color]; ++x) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
467 |
iMap[color][x] = 0; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
468 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
469 |
// Set 255 mapping part of the LUT |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
470 |
for (x=MaxBins[color]; x<=255; ++x) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
471 |
iMap[color][x] = 255; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
472 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
473 |
// Compute linear stretching part of the LUT |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
474 |
for (x=MinBins[color]+1; x<MaxBins[color]; x++) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
475 |
iMap[color][x] = (TUint8)(255*(x-MinBins[color])/(MaxBins[color]-MinBins[color])); |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
476 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
477 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
478 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
479 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
480 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
481 |
/* |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
482 |
----------------------------------------------------------------------------- |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
483 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
484 |
CDCIetd |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
485 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
486 |
SetParams |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
487 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
488 |
Set processing parameters |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
489 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
490 |
Return Values: none |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
491 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
492 |
----------------------------------------------------------------------------- |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
493 |
*/ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
494 |
void CDCIetd::SetParams(DCIetdParameters* params) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
495 |
{ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
496 |
iParameters = *params; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
497 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
498 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
499 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
500 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
501 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
502 |
/* |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
503 |
----------------------------------------------------------------------------- |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
504 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
505 |
CDCIetd |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
506 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
507 |
GetParams |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
508 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
509 |
Get current processing parameters |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
510 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
511 |
Return Values: none |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
512 |
|
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
513 |
----------------------------------------------------------------------------- |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
514 |
*/ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
515 |
void CDCIetd::GetParams(DCIetdParameters* params) |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
516 |
{ |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
517 |
*params = iParameters; |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
518 |
} |
951a5db380a0
Committing the Video Editor package under the Eclipse Public License
Mikael Laine <mikael.laine@ixonos.com>
parents:
diff
changeset
|
519 |
//----IMAAMI---- |