local standard deviation

edit

hi, here i have tried to get the local standard deviation of image using 5x5 block. but i dont know where my code is crashing. according to me there is some dimension error of loop. can any one tell me what exactly wrong i am doing here.

below is my code :-

private BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this) {

@Override
public void onManagerConnected(int status) {
   switch (status) {
       case LoaderCallbackInterface.SUCCESS:
       {
           Log.i(TAG, "OpenCV loaded successfully");

              String photoPath = "/storage/emulated/0/Download/std.bmp";

               BitmapFactory.Options options = new BitmapFactory.Options();
               options.inPreferredConfig = Config.RGB_565;
               Bitmap bitmap = BitmapFactory.decodeFile(photoPath, options);

               width = bitmap.getWidth();
               height = bitmap.getHeight();

           //Bitmap tmp = null;
           processing(bitmap);

           setContentView(R.layout.activity_main);
       } break;
       default:
       {
      super.onManagerConnected(status);
       } break;

   }
}

public String processing(Bitmap t1) {

    Mat rgb = new Mat (height, width, CvType.CV_8U, new Scalar(4));       
    Mat gry = new Mat (height, width, CvType.CV_8U, new Scalar(4));   
    Mat imfilter = new Mat (height, width, CvType.CV_8U, new Scalar(4));
    Mat res = new Mat (height, width, CvType.CV_8U, new Scalar(4));
    Mat block = new Mat (5, 5, CvType.CV_8U);

    Bitmap bmp = t1.copy(Bitmap.Config.ARGB_8888, true);

    Utils.bitmapToMat(bmp, rgb);

    Imgproc.cvtColor(rgb, gry, Imgproc.COLOR_RGB2GRAY);

    int rows = gry.rows(); int cols = gry.cols();



    Mat tmp = new Mat(rows, cols, gry.type());
    Imgproc.copyMakeBorder(tmp, tmp, 1, 1, 1, 1, 1);
    rows = tmp.rows();cols=tmp.cols();
    rows = rows-1;cols = cols-1;

    for(int i=2;i<rows-2;i++)
    {
        for(int j=2;j<cols-2;j++)
        {
            int sum1=0;
            int sum2=0;
            block = tmp.rowRange(i-2,i+3).colRange(j-2,j+3);

            sum1 = (int) Core.sumElems(block).val[0];
            sum2 = (int) Core.sumElems(block.mul(block)).val[0];

            int mean = sum1/25;
            int variance = -(mean*mean -(sum2/25));
            int deviation = (int) Math.sqrt(variance);

            tmp.put(i-2, j-2, deviation);
        }
    }

    Bitmap scale = Bitmap.createBitmap(gry.cols(), gry.rows(), Bitmap.Config.ARGB_8888);


    Utils.matToBitmap(tmp, scale);


    Bitmap std = Bitmap.createBitmap(tmp.cols(), tmp.rows(), Bitmap.Config.ARGB_8888);


    Utils.matToBitmap(imfilter, std);

    String filename1 = "/storage/emulated/0/Download/stdfilt.jpg";


    boolean b1 = Highgui.imwrite(filename1, tmp);

    if (b1==true)

        Toast.makeText(getApplicationContext(),"Image Saved",Toast.LENGTH_LONG).show();
      else
          Toast.makeText(getApplicationContext(),"Not Saved",Toast.LENGTH_LONG).show();


    return null;

}

Here is its logcat :-

10-29 23:11:06.346: E/cv::error()(31569): OpenCV Error: Assertion failed (src.dims == 2 && info.height == (uint32_t)src.rows && info.width == (uint32_t)src.cols) in void Java_org_opencv_android_Utils_nMatToBitmap2(JNIEnv, jclass, jlong, jobject, jboolean), file /home/reports/ci/slave_desktop/50-SDK/opencv/modules/java/generator/src/cpp/utils.cpp, line 97 10-29 23:11:06.346: E/org.opencv.android.Utils(31569): nMatToBitmap catched cv::Exception: /home/reports/ci/slave_desktop/50-SDK/opencv/modules/java/generator/src/cpp/utils.cpp:97: error: (-215) src.dims == 2 && info.height == (uint32_t)src.rows && info.width == (uint32_t)src.cols in function void Java_org_opencv_android_Utils_nMatToBitmap2(JNIEnv, jclass, jlong, jobject, jboolean) 10-29 23:11:06.346: W/dalvikvm(31569): threadid=1: thread exiting with uncaught exception (group=0x41bb3798) 10-29 23:11:06.356: E/AndroidRuntime(31569): FATAL EXCEPTION: main 10-29 23:11 ... (more)