blob: cac2b9939e8f0bcee3a1ef48225d762fd70d3d82 (
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void setup() {
size(512, 256);
PImage img = loadImage("lena.png");
img.resize(256, 256);
img.filter(GRAY);
image(img, 0, 0);
image(quantization(img, 10), 256, 0);
}
PImage quantization(PImage I, int k) {
PImage out = I.copy();
out.loadPixels();
int r;
for (int i = 0; i < out.pixels.length; ++i) {
r = (int) floor((red(out.pixels[i])*k)/256);
r = int((float(r)/(k-1))*255);
out.pixels[i] = color(r);
}
out.updatePixels();
return out;
}
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