i&m: add operations

1 files changed, 25 insertions, 0 deletions

diff --git a/Year_2/IandM/psnr_mse/psnr_mse8365406430453607560.autosave b/Year_2/IandM/psnr_mse/psnr_mse8365406430453607560.autosave
new file mode 100644
index 0000000..cac2b99
--- /dev/null
+++ b/Year_2/IandM/psnr_mse/psnr_mse8365406430453607560.autosave
@@ -0,0 +1,25 @@
+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;
+}