Februar 23, 2012

size(704, 750);

PImage img = loadImage("bradburybuilding_1989.jpg");
image(img, 0, 0);
int[] hist = new int[256];

for (int i = 0; i < img.width; i++) {
for (int j = 0; j < img.height; j++) {
int bright = int(brightness(get(i, j)));
hist[bright]++;
}
}

int histMax = max(hist);

stroke(255);
for (int i = 0; i < img.width; i += 2) {
int which = int(map(i, 0, img.width, 0, 255));

int y = int(map(hist[which], 0, histMax, img.height, 0));
line(i, img.height, i, y);
}