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void | sharpenImage (QImage &image, float sigma, QPoint offset, QSize fullImageRes, QImage *edgeImage, bool blurEdges) |
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Definition at line 92 of file sharpen.cpp. References b1, b2, blurImage(), edgeImage, HSVtoRGB(), and RGBtoHSV(). Referenced by GrainEditor::adjustImage(). 00095 { 00096 //construct blur copy 00097 QImage blurredImage = image.copy(); 00098 blurImage( blurredImage, sigma ); 00099 00100 //iterate over each pixel and adjust luminance value 00101 int x, y; 00102 QRgb *origRgb, *blurredRgb, *edgeRgb; 00103 uchar *origScanline; 00104 uchar *blurredScanline; 00105 uchar *edgesScanline = NULL; 00106 00107 for(y=0; y<image.height(); y++) 00108 { 00109 origScanline = image.scanLine(y); 00110 blurredScanline = blurredImage.scanLine(y); 00111 if( edgeImage != NULL ) 00112 { 00113 int edgeY = ((edgeImage->height()-1) * (y+offset.y())) / (fullImageRes.height()-1); 00114 edgesScanline = edgeImage->scanLine(edgeY); 00115 } 00116 00117 for(x=0; x<image.width(); x++) 00118 { 00119 //get rgb triplets 00120 origRgb = ((QRgb*)origScanline+x); 00121 double r1 = ((double)qRed(*origRgb) )/255.0; 00122 double g1 = ((double)qGreen(*origRgb) )/255.0; 00123 double b1 = ((double)qBlue(*origRgb) )/255.0; 00124 00125 blurredRgb = ((QRgb*)blurredScanline+x); 00126 double r2 = ((double)qRed(*blurredRgb) )/255.0; 00127 double g2 = ((double)qGreen(*blurredRgb) )/255.0; 00128 double b2 = ((double)qBlue(*blurredRgb) )/255.0; 00129 00130 //sharpen the entire thing! 00131 float alpha; 00132 if( edgeImage == NULL) 00133 alpha = 1.0f; 00134 else 00135 { 00136 int edgeX = ((edgeImage->width()-1) * (x+offset.x())) / (fullImageRes.width()-1); 00137 edgeRgb = ((QRgb*)edgesScanline+edgeX); 00138 00139 alpha = ((float) qRed( *edgeRgb )) / 255.0f; 00140 00141 //blur regions, not edges 00142 if(!blurEdges) 00143 alpha = 1.0f - alpha; 00144 } 00145 00146 //convert to hsv 00147 double h1,s1,v1; 00148 RGBtoHSV(r1,g1,b1,&h1,&s1,&v1); 00149 00150 double h2,s2,v2; 00151 RGBtoHSV(r2,g2,b2,&h2,&s2,&v2); 00152 00153 //reset v 00154 v1 = (alpha * QMIN( QMAX(2*v1 - v2, 0), 1.0 )) + (1-alpha)*v1; 00155 00156 //convert adjusted color back to rgb colorspace and clamp 00157 HSVtoRGB( &r1,&g1,&b1, h1,s1,v1); 00158 int rp = (int) QMIN( QMAX((r1*255), 0), 255 ); 00159 int gp = (int) QMIN( QMAX((g1*255), 0), 255 ); 00160 int bp = (int) QMIN( QMAX((b1*255), 0), 255 ); 00161 00162 //set adjusted color value 00163 *origRgb = qRgb(rp,gp,bp); 00164 } //x 00165 } //y 00166 00167 }
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