title: Set hue of image store in matrix
body: <p>I am trying to change the hue of image store in matrix. I got a hue channel using split() function but i am not able to change its hue. I am using the function set(Scalar scalar) to change its hue, but i don't see any change in image. </p>
  
  <pre><code>        Mat eyeball_HSV = new Mat();
          Mat dest = new Mat();       
          Mat eye = new Mat();
  
          eye = mRgba.submat(eye_template);
  
          List&lt;Mat&gt; hsv_channel = new ArrayList&lt;Mat&gt;();
  
             Imgproc.cvtColor(eye, eyeball_HSV, Imgproc.COLOR_RGB2HSV, 0);
  
            // get HSV channel 
          //hsv_channel[0] is hue
          //hsv_channel[1] is saturation
          //hsv_channel[2] is visibility
          Core.split(eyeball_HSV, hsv_channel);
  
          try
          {
               hsv_channel.get(0).setTo(new Scalar(145,25,45));
               Log.v(TAG, "Got the Channel!");
          }
          catch(Exception ex)
          {
              ex.printStackTrace();
              Log.v(TAG, "Didn't get any channel");
          }
  
          Imgproc.cvtColor(eyeball_HSV, dest, Imgproc.COLOR_HSV2RGB);
          Imgproc.cvtColor(dest, eye, Imgproc.COLOR_RGB2RGBA);
  </code></pre>