From 1942f603803a92b0c2f078975a04167a6ee2f7bf Mon Sep 17 00:00:00 2001
From: Santo Cariotti <santo@dcariotti.me>
Date: Thu, 18 Feb 2021 19:18:32 +0100
Subject: i&m: add operators

---
 Year_2/IandM/median/data/lena.png | Bin 0 -> 473831 bytes
 Year_2/IandM/median/median.pde    |  37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 Year_2/IandM/median/data/lena.png
 create mode 100644 Year_2/IandM/median/median.pde

(limited to 'Year_2/IandM/median')

diff --git a/Year_2/IandM/median/data/lena.png b/Year_2/IandM/median/data/lena.png
new file mode 100644
index 0000000..59ef68a
Binary files /dev/null and b/Year_2/IandM/median/data/lena.png differ
diff --git a/Year_2/IandM/median/median.pde b/Year_2/IandM/median/median.pde
new file mode 100644
index 0000000..856e50e
--- /dev/null
+++ b/Year_2/IandM/median/median.pde
@@ -0,0 +1,37 @@
+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;
+}
-- 
cgit v1.2.3-18-g5258