Help!!! Problem about grabCut

[Chenglong Wang]

I use grabCut in my app, but the program always had no response when "GrabCut begins" appeared in logcat.

So I am pretty sure the problem it's in the function. 

Is it a format problem or something else? I use Android OpenCV-2.3.1 library.

Here is the codes:

...............

   Bitmap bitmap = BitmapFactory.decodeFile(mCurrentImagePath);

Log.i(TAG, mCurrentImagePath);

//JPEG2RGB888

bitmap = JPEG2RGB888(bitmap);

Log.i(TAG, "JPEG2RGB888");

//GrabCut part

ma_img=Utils.bitmapToMat(bitmap);

Rect rect;

Point p1, p2;

p1 = new Point(0,0);

       p2 = new Point(ma_img.cols(),ma_img.rows());

       rect=new Rect(p1,p2);

       

       mask = new Mat();

       fgdModel = new Mat();

       bgdModel = new Mat();

       ma_img.convertTo(ma_img, CvType.CV_8UC3);

                   Log.i(TAG, "Grabcut begins");

           

Imgproc.grabCut(ma_img, mask, rect, bgdModel, fgdModel, 0, Imgproc.GC_INIT_WITH_RECT);

Imgproc.grabCut(ma_img, mask, rect, bgdModel, fgdModel, 2);

           Log.i(TAG, "Grabcut ends");

//Imgproc.cvtColor(mask, mask, Imgproc.COLOR_GRAY2RGBA, 4);

//convert to Bitmap

Log.i(TAG, "Convert to Bitmap");

bitmap = Bitmap.createBitmap(mask.cols(), mask.rows(), Bitmap.Config.ARGB_8888);

Utils.matToBitmap(mask, bitmap);

//release MAT part

ma_img.release();

mask.release();

fgdModel.release();

bgdModel.release();

           mImageView.setImageBitmap(bitmap);

[Andrey Pavlenko]

Here is your code that I modified to do the work OK.

But be aware that I used OpenCV 2.4.0 package, the API changed a bit..

Also be aware that grabCut() call is very slow! It may take several seconds.

    public void doTask1(ImageView iv) {
    Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.fruits);
 Log.d(TAG, "bitmap: " + bitmap.getWidth() + "x" + bitmap.getHeight());


 bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
 Log.d(TAG, "bitmap 8888: " + bitmap.getWidth() + "x" + bitmap.getHeight());


 //GrabCut part
 Mat img = new Mat();
 Utils.bitmapToMat(bitmap, img);
 Log.d(TAG, "img: " + img);
 
 int r = img.rows();
 int c = img.cols();
 Point p1 = new Point(c/10, r/10);
 Point p2 = new Point(c-c/10, r-r/10);
        Rect rect = new Rect(p1, p2);
 Log.d(TAG, "rect: " + rect);
       
        Mat mask = new Mat();
        Mat fgdModel = new Mat();
        Mat bgdModel = new Mat();


        Mat imgC3 = new Mat();
        Imgproc.cvtColor(img, imgC3, Imgproc.COLOR_RGBA2RGB);
 Log.d(TAG, "imgC3: " + imgC3);
 
        Log.d(TAG, "Grabcut begins");
 Imgproc.grabCut(imgC3, mask, rect, bgdModel, fgdModel, 2, Imgproc.GC_INIT_WITH_RECT);
        Log.d(TAG, "Grabcut ends");
 
 Log.d(TAG, "mask: " + mask);
 Log.d(TAG, "bgdModel: " + bgdModel);
 Log.d(TAG, "fgdModel: " + fgdModel);
 
 Core.convertScaleAbs(mask, mask, 100, 0);
 Imgproc.cvtColor(mask, mask, Imgproc.COLOR_GRAY2RGBA);
 Log.d(TAG, "maskC4: " + mask);
 
 //convert to Bitmap
 Log.d(TAG, "Convert to Bitmap");
 //Utils.matToBitmap(imgC3, bitmap);
 Utils.matToBitmap(mask, bitmap);
    iv.setImageBitmap(bitmap);


 //release MAT part
 img.release();
 imgC3.release();
 mask.release();
 fgdModel.release();
 bgdModel.release();
    }