Create Steganography.js

Author: adryxta

Steganography.js

@@ -0,0 +1,33 @@
+function chop2hide(image){
+    for(var pix of image.values()){
+        pix.setRed(Math.floor(pix.getRed()/16)*16);
+        pix.setBlue(Math.floor(pix.getBlue()/16)*16);
+        pix.setGreen(Math.floor(pix.getGreen()/16)*16);
+    }
+    return image;
+}
+
+function shift(image){
+    for(var pix of image.values()){
+        pix.setRed(Math.floor(pix.getRed()%16));
+        pix.setGreen(Math.floor(pix.getBlue()%16))
+        pix.setBlue(Math.floor(pix.getGreen()%16))
+    }
+    return image;
+}
+
+function combine(img1,img2){
+    for(var pix of img1.values()){
+        pix.setRed(Math.floor(pix.getRed()/16)*16+Math.floor(pix.getRed()/16));
+        pix.setBlue(Math.floor(pix.getBlue()/16)*16+Math.floor(pix.getBlue()/16));
+        pix.setGreen(Math.floor(pix.getGreen()/16)*16+Math.floor(pix.getGreen()/16));
+    }
+    return img1;
+}
+
+var start = new SimpleImage("usain.jpg");
+var hide = new SimpleImage("skyline.jpg");
+start = chop2hide(start);
+hide = shift(hide);
+var stego = combine(start,hide);
+print(stego);