Exemple #1
0
void ofxGreenscreen::learnBgColor(ofPixelsRef pixelSource, int x, int y, int w, int h) {
	int wh = w * h;
	int r,g,b;
	r=g=b=0;
	for(int iy=0; iy<h; iy++) {
		for(int ix=0; ix<w; ix++) {
			int i = pixelSource.getPixelIndex(ix+x, iy+y);
			r+=pixelSource[i];
			g+=pixelSource[i+1];
			b+=pixelSource[i+2];
		}
	}
	r/=wh;
	g/=wh;
	b/=wh;
	bgColor.set(r, g, b);
	update();
}