Get bitmap from a part of canvas

Question

I have Canvas with a Bitmap and I draw some markers on specific positions of Canvas:

canvas.drawCircle( x, y, 10, paint );

Now I have to cut off part of that Canvas and create a Bitmap. But when I try to create a new Bitmap with:

Bitmap b = Bitmap.createBitmap(mBitmap, x, y, w, h);

I don't get correct part of the image.

How can I get same part of the image like it is marked on the Canvas?