I am looking for a free or paid library.
Update
It looks like there is no such library, but the following code works as expected:
public static void applySepiaFilter(BufferedImage img, int sepiaIntensity) {
int sepiaDepth = 20;
int w = img.getWidth();
int h = img.getHeight();
WritableRaster raster = img.getRaster();
int[] pixels = new int[w*h*3];
raster.getPixels(0, 0, w, h, pixels);
for (int i=0;i<pixels.length; i+=3) {
int r = pixels[i];
int g = pixels[i+1];
int b = pixels[i+2];
int gry = (r + g + b) / 3;
r = g = b = gry;
r = r + (sepiaDepth * 2);
g = g + sepiaDepth;
if (r>255) r=255;
if (g>255) g=255;
if (b>255) b=255;
b-= sepiaIntensity;
if (b<0) b=0;
if (b>255) b=255;
pixels[i] = r;
pixels[i+1]= g;
pixels[i+2] = b;
}
raster.setPixels(0, 0, w, h, pixels);
}
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