title: How to read value of the each pixel as RGB values from Mat object m in OpenCV
body: <p>This is my code where I am reading image <code>rectangle.jpg</code> from <code>/sdcard</code>. I want to know the pixel value (normal, as well as in RGB format). What code should I use to deal with it?</p>
  
  <pre><code>package com.idag.edge;
  
  import android.os.Bundle;
  import android.os.Environment;
  import android.app.Activity;
  import android.util.Log;
  import android.widget.TextView;
  
  import org.opencv.android.OpenCVLoader;
  import org.opencv.core.Mat;
  import org.opencv.highgui.Highgui;
  
  public class MainActivity extends Activity {  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          try
          {
              String path=Environment.getExternalStorageDirectory().getAbsolutePath() +"/rectangle.jpg";
              Mat m=Highgui.imread(path,1); 
              Log.i("Paramenres on matrix", "height "+ m.height()+" width "+ m.width()+" total = "+m.total()+" channels " +m.channels());
  
              System.out.println("element at 0 0 = "+ m.row(0).col(0).nativeObj+" element at 150 150 = "+ m.row(150).col(150).nativeObj);
          }
  
          catch(Exception e){
              System.err.print("Error in the code");
              Log.i("Error in imread", "Error in imread");
          } 
      }
  
  }
  </code></pre>