Calibrate works?

lib/video/examples/Capture/Mirror/Mirror.pde

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+/**
+ * Mirror 
+ * by Daniel Shiffman.  
+ *
+ * Each pixel from the video source is drawn as a rectangle with rotation based on brightness.   
+ */ 
+ 
+import processing.video.*;
+
+
+// Size of each cell in the grid
+int cellSize = 20;
+// Number of columns and rows in our system
+int cols, rows;
+// Variable for capture device
+Capture video;
+
+
+void setup() {
+  size(640, 480);
+  frameRate(30);
+  cols = width / cellSize;
+  rows = height / cellSize;
+  colorMode(RGB, 255, 255, 255, 100);
+
+  // This the default video input, see the GettingStartedCapture 
+  // example if it creates an error
+  video = new Capture(this, width, height);
+  
+  // Start capturing the images from the camera
+  video.start();  
+  
+  background(0);
+}
+
+
+void draw() { 
+  if (video.available()) {
+    video.read();
+    video.loadPixels();
+  
+    // Begin loop for columns
+    for (int i = 0; i < cols; i++) {
+      // Begin loop for rows
+      for (int j = 0; j < rows; j++) {
+      
+        // Where are we, pixel-wise?
+        int x = i*cellSize;
+        int y = j*cellSize;
+        int loc = (video.width - x - 1) + y*video.width; // Reversing x to mirror the image
+      
+        float r = red(video.pixels[loc]);
+        float g = green(video.pixels[loc]);
+        float b = blue(video.pixels[loc]);
+        // Make a new color with an alpha component
+        color c = color(r, g, b, 75);
+      
+        // Code for drawing a single rect
+        // Using translate in order for rotation to work properly
+        pushMatrix();
+        translate(x+cellSize/2, y+cellSize/2);
+        // Rotation formula based on brightness
+        rotate((2 * PI * brightness(c) / 255.0));
+        rectMode(CENTER);
+        fill(c);
+        noStroke();
+        // Rects are larger than the cell for some overlap
+        rect(0, 0, cellSize+6, cellSize+6);
+        popMatrix();
+      }
+    }
+  }
+}