Calibrate works?

lib/video/examples/Capture/Mirror2/Mirror2.pde

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+/**
+ * Mirror 2 
+ * by Daniel Shiffman. 
+ *
+ * Each pixel from the video source is drawn as a rectangle with size based on brightness.  
+ */
+ 
+import processing.video.*;
+
+// Size of each cell in the grid
+int cellSize = 15;
+// Number of columns and rows in our system
+int cols, rows;
+// Variable for capture device
+Capture video;
+
+
+void setup() {
+  size(640, 480);
+  // Set up columns and rows
+  cols = width / cellSize;
+  rows = height / cellSize;
+  colorMode(RGB, 255, 255, 255, 100);
+  rectMode(CENTER);
+
+  // 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();
+    
+    background(0, 0, 255);
+
+    // 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
+
+        // Each rect is colored white with a size determined by brightness
+        color c = video.pixels[loc];
+        float sz = (brightness(c) / 255.0) * cellSize;
+        fill(255);
+        noStroke();
+        rect(x + cellSize/2, y + cellSize/2, sz, sz);
+      }
+    }
+  }
+}