コード例 #1
0
ファイル: FGExtraction.cpp プロジェクト: Kitware/VIAME
/*******************************************************************************
* Function:      doubleThresholdByValue  
* Description:   performs double local thresholding using Otsu's method
* Arguments:
	percentage      -   parameter for amount of lowering Otsu threshold
	roiMask         -   ROI binary mask
	
* Returns:       void
* Comments:
* Revision: 
*******************************************************************************/
void
FGExtraction::doubleThresholdByValue(double percentage, Mat roiMask)
{
	int u = 0;
	int thresh = getOtsuThreshold(0, 255, &u, roiMask);
	int highThresh = thresh - int(percentage*(thresh - u));
	int lowThresh = thresh - int(1.4*percentage*(thresh - u));

#ifdef DEBUG
	//cout << "th_H = " << highThresh << "; th_L = " << lowThresh << "; \n";
#endif

	Mat maskedFG;
	bitwise_and(_inImg, roiMask, maskedFG);
	
	// generate high and low look-up tables
	Mat highLUT(1, 256, CV_8U);
	Mat lowLUT(1, 256, CV_8U);
    uchar* highData = highLUT.data; 
	uchar* lowData = lowLUT.data;
    for(int i = 0; i < 256; ++i){
        highData[i] = i <= highThresh ? 0 : 255;
		lowData[i] = i <= lowThresh ? 0 : 255;
	}

	// threshold by using look-up tables
	LUT(maskedFG, highLUT, _highMask);
	LUT(maskedFG, lowLUT, _lowMask);
	bitwise_or(_fgHighImg, _highMask, _fgHighImg, roiMask);
	bitwise_or(_fgLowImg, _lowMask, _fgLowImg, roiMask);
}
コード例 #2
0
ファイル: ImageProcessor.cpp プロジェクト: Ovilia/PIP
int ImageProcessor::getHigherThreshold()
{
    switch (thresholdPolicy) {
    case ImagePolicy::OTSU:
        return getOtsuThreshold();
    case ImagePolicy::ENTROPY:
        return getEntropyThreshold();
    case ImagePolicy::COSTUMED:
        return higherThreshold;
    }
    return 0;
}