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-rw-r--r--Year_2/IandM/stretching/data/lena.pngbin0 -> 473831 bytes
-rw-r--r--Year_2/IandM/stretching/stretching.pde32
2 files changed, 32 insertions, 0 deletions
diff --git a/Year_2/IandM/stretching/data/lena.png b/Year_2/IandM/stretching/data/lena.png
new file mode 100644
index 0000000..59ef68a
--- /dev/null
+++ b/Year_2/IandM/stretching/data/lena.png
Binary files differ
diff --git a/Year_2/IandM/stretching/stretching.pde b/Year_2/IandM/stretching/stretching.pde
new file mode 100644
index 0000000..0814190
--- /dev/null
+++ b/Year_2/IandM/stretching/stretching.pde
@@ -0,0 +1,32 @@
+void setup() {
+ size(512, 256);
+ PImage img = loadImage("lena.png");
+ img.resize(256, 256);
+ img.filter(GRAY);
+
+ image(img, 0, 0);
+ image(stretching(img), 256, 0);
+}
+
+PImage stretching(PImage I) {
+ PImage out = I.copy();
+ out.loadPixels();
+
+ float max = red(out.pixels[0]);
+ float min = max;
+
+ for (int i = 0; i < out.pixels.length; ++i) {
+ float t = red(out.pixels[i]);
+ if (t < min)
+ min = t;
+ if (t > max)
+ max = t;
+ }
+
+ for (int i = 0; i < out.pixels.length; ++i) {
+ out.pixels[i]= color(255*(red(out.pixels[i])-min)/(max-min));
+ }
+
+ out.updatePixels();
+ return out;
+}