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sinterface IIntegralImage extends MakesBufferedImage { public int getWidth(); public int getHeight(); // get value for 1 channel // normal range [0; pixelCount*256) public double getIntegralValue(int x, int y, int channel); // gets value of the 3 channels // normal range [0; pixelCount*256*3) default double getIntegralValue(int x, int y) { ret getIntegralValue(x, y, 0) + getIntegralValue(x, y, 1) + getIntegralValue(x, y, 2); } default double rectSum(int x1, int y1, int x2, int y2, int channel) { double bottomLeft = getIntegralValue(x1-1, y2-1, channel); double bottomRight = getIntegralValue(x2-1, y2-1, channel); double topLeft = getIntegralValue(x1-1, y1-1, channel); double topRight = getIntegralValue(x2-1, y1-1, channel); ret bottomRight+topLeft-topRight-bottomLeft; } default double rectSum(int x1, int y1, int x2, int y2) { double bottomLeft = getIntegralValue(x1-1, y2-1); double bottomRight = getIntegralValue(x2-1, y2-1); double topLeft = getIntegralValue(x1-1, y1-1); double topRight = getIntegralValue(x2-1, y1-1); ret bottomRight+topLeft-topRight-bottomLeft; } default IIntegralImage clip(int x, int y, int w, int h) { ret IIVirtualClip(this, x, y, w, h); } }