--- a/htiui/HtiServicePlugins/HtiScreenshotServicePlugin/inc/HtiTextRcg.h Fri Sep 03 07:53:25 2010 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,178 +0,0 @@
-/*
-* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
-* All rights reserved.
-* This component and the accompanying materials are made available
-* under the terms of "Eclipse Public License v1.0"
-* which accompanies this distribution, and is available
-* at the URL "http://www.eclipse.org/legal/epl-v10.html".
-*
-* Initial Contributors:
-* Nokia Corporation - initial contribution.
-*
-* Contributors:
-*
-* Description: Text recognition algorithm implementation.
-*
-*/
-
-
-#ifndef __HTI_TEXT_RCG_
-#define __HTI_TEXT_RCG_
-
-#include <fbs.h>
-#include <gulfont.h>
-#include <e32math.h>
-
-const TInt KDefaultAvgDiffMin = 50;
-const TInt KDefaultFgSSMin = 50;
-const TInt KDefaultFgAvgDiffMin = 5; //in "pure" (not AA) pixels
-const TInt KWorstCase = 0xFF;
-const TInt KSuccessThresold = 50;
-const TInt KNormCoefAcc = 2;
-
-const TInt KDefaultFGAAmount = 5;
-const TInt KDefaultBGAAmount = 10;
-
-const TInt KFgPatternColor = 0x00; //black
-const TInt KBgPatternColor = 0xff; //white
-
-TInt CompareTPoint(const TPoint& aP1,const TPoint& aP2);
-
-enum THtiTextRecgHints
- {
- EHintNone = 0,
- EHintEdge = 1
- };
-
-/**
-* The class implements text recognition algorithm on screenshots
-* based on system fonts
-*
-*/
-class CHtiTextRcg : public CBase
-{
-public:
- CHtiTextRcg();
- virtual ~CHtiTextRcg();
-
- void SetHint(TInt aHint);
-
- TBool RecognizeTextL(CFbsBitmap* aScreenshot,
- const TDesC& aText,
- const CFont* aFont,
- TRect& aResult);
-
- /**
- * aResult will contain the coordinates of the found text
- * Return 0 if match is perfect, 255 if text was not found
- * return value from 0 to 255 means some error, the lower it is the better match
- *
- */
- //brute force optim
- TInt RecognizeAAL(CFbsBitmap* aScreenshot,const TDesC& aText, const CFont* aFont, TRect& aResult);
- //brute force clean optim
- TInt RecognizeBinL(CFbsBitmap* aScreenshot,const TDesC& aText, const CFont* aFont, TRect& aResult);
-
- //static image processing routines
- //convert image to 256-greyscale
- static CFbsBitmap* ColorDownL(CFbsBitmap * aBitmap);
- //generates bitmap of the text using the font given
-
- static CFbsBitmap* GetTextBitmapL( const TDesC& aText,
- const CFont* fontUsed,
- const TInt aLength = KMaxTInt );
-
- static CFbsBitmap* GetTextBitmapL( const TDesC& aText,
- const CFont* fontUsed,
- TRgb aForeground,
- TRgb aBackground,
- TDisplayMode aDisplayMode,
- const TInt aLength = KMaxTInt );
-
- //calculates min max of a greyscale bitmap in question
- static void MinMax(CFbsBitmap * aBitmap, TInt& aMin, TInt& aMax);
-
- /**
- * use FGA and BGA to speed-up comparation
- * this function only returns 255 or 0
- * Analyses only min and max colors
- */
- TInt ImageDiffBinSampleL(CFbsBitmap * aBitmap1, TPoint aOrigin1,
- CFbsBitmap * aBitmap2);
-
- /**
- * Iterations like in Diff5 but metrics from Diff6
- * Used for full word checking if Diff6 is 0 for a letter
- * this function only returns 255 or 0
- */
- TInt ImageDiffBinFullL(CFbsBitmap * aBitmap1, TPoint aOrigin1,
- CFbsBitmap * aBitmap2);
-
- /**
- * use FGA and BGA to speed-up comparation and AA pixels
- */
- TInt ImageDiffAASampleL(CFbsBitmap * aBitmap1, TPoint aOrigin1,
- CFbsBitmap * aBitmap2);
-
- /**
- * Iterations like in Diff5 but metrics from Diff6/DiffAASample
- * Used for full word checking if Diff6 is 0 for a letter
- */
- TInt ImageDiffAAFullL(CFbsBitmap * aBitmap1, TPoint aOrigin1,
- CFbsBitmap * aBitmap2);
-
- /*
- * Analyze pattern and fills in FGA and BGA sets
- * Return ETrue if pattern is valid (non empty)
- */
- TBool AnalyzePatternL(CFbsBitmap * aPattern);
-
-private:
- //algorithm parameters
- //minimal abs avarage difference beetwen foreground and background
- TInt iAvgDiffMin;
- //minimal SS for foreground, with plain color should be 0
- TInt iFgSSMin;
- /**
- * minimal avg diff for foreground, used in Diff3
- */
- TInt iFgAvgDiffMin;
-
- //TInt64 iSeed;
-
- //following vars set by AnalyzePatternL
- TInt iFGAAmount;
- TInt iBGAAmount;
- //foreground assesment point set
- RArray<TPoint> iFGASet;
- //background assesment point set
- RArray<TPoint> iBGASet;
-
- //font color in reference image
- TInt iMaskFgColor;//
- //background color in reference image
- TInt iMaskBgColor;//
-
- //used for AA algorithm
- //set in Sample function and used in Full function
- //for optimization
- TInt iTestFgColor;
- TInt iTestBgColor;
-
- // normalization coeff to compare test image with mask directly
- // |iMaskFgColor-iMaskBgColor|*NormCoefAcc)/|iTestFgColor-iTestBgColor|
- // where NormCoefAcc multiplyer is used to increase accuracy (all ints)
- // and is implemented as shif by KNormCoefAcc bits
- // back shift is performed after color is multiplied by iTestNormCoef
- TInt iTestNormCoef;
-
- /**
- * Current recognition method
- * Changed by SetHint
- */
- TInt iCurrentStrategy;
-};
-
-#endif //__HTI_TEXT_RCG_
-
-// End of file