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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(median(img, 11), 256, 0);
}
PImage median(PImage I, int n) {
PImage out = createImage(I.width, I.height, RGB);
int off = n/2;
for (int x = 0; x < I.width; ++x) {
for (int y = 0; y < I.height; ++y) {
PImage t = I.get(x-off, y-off, n, n);
float[] tarr = new float[n*n];
t.loadPixels();
for(int i = 0; i < t.pixels.length; ++i) {
tarr[i] = red(t.pixels[i]);
}
tarr = sort(tarr);
float med = tarr[(n*n)/2];
if((n*n)%2 == 0) {
med = (med+tarr[(n*n)/2-1])/2;
}
out.set(x, y, color(med));
}
}
return out;
}
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