Initial Commit

Java/Processing/processing-3.3.6/modes/java/examples/Topics/Image Processing/Brightness/Brightness.pde

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+/**
+ * Brightness
+ * by Daniel Shiffman. 
+ * 
+ * This program adjusts the brightness of a part of the image by
+ * calculating the distance of each pixel to the mouse.
+ */
+
+PImage img;
+
+void setup() {
+  size(640, 360);
+  frameRate(30);
+  img = loadImage("moon-wide.jpg");
+  img.loadPixels();
+  // Only need to load the pixels[] array once, because we're only
+  // manipulating pixels[] inside draw(), not drawing shapes.
+  loadPixels();
+}
+
+void draw() {
+  for (int x = 0; x < img.width; x++) {
+    for (int y = 0; y < img.height; y++ ) {
+      // Calculate the 1D location from a 2D grid
+      int loc = x + y*img.width;
+      // Get the R,G,B values from image
+      float r,g,b;
+      r = red (img.pixels[loc]);
+      //g = green (img.pixels[loc]);
+      //b = blue (img.pixels[loc]);
+      // Calculate an amount to change brightness based on proximity to the mouse
+      float maxdist = 50;//dist(0,0,width,height);
+      float d = dist(x, y, mouseX, mouseY);
+      float adjustbrightness = 255*(maxdist-d)/maxdist;
+      r += adjustbrightness;
+      //g += adjustbrightness;
+      //b += adjustbrightness;
+      // Constrain RGB to make sure they are within 0-255 color range
+      r = constrain(r, 0, 255);
+      //g = constrain(g, 0, 255);
+      //b = constrain(b, 0, 255);
+      // Make a new color and set pixel in the window
+      //color c = color(r, g, b);
+      color c = color(r);
+      pixels[y*width + x] = c;
+    }
+  }
+  updatePixels();
+}