Oh and the BLOBables file.

BLOBables.pde

@@ -0,0 +1,24 @@
+public final class BLOBable_blueBlobs implements BLOBable{
+  private PImage img_;
+  int col = color(0, 0, 255);
+  
+  public BLOBable_blueBlobs(PImage img){
+    img_ = img;
+  }
+  
+  //@Override
+  public final void init() {
+  }
+  
+  //@Override
+  public final void updateOnFrame(int width, int height) {
+  }
+  //@Override
+  public final boolean isBLOBable(int pixel_index, int x, int y) {
+    if( img_.pixels[pixel_index] ==  col){
+      return true;
+    } else {
+      return false;
+    }
+  }
+}