Java openCV - Error while conevrting Bitmap to Mat

Question

I am using Java openCV, and i try to load a photo and run the template matching over it. The template matching method deals with Mat objects, so i need to load the images an

Answer 1

You need to convert your bitmap to the RGBA format:

Bitmap bmp32 = i.copy(Bitmap.Config.ARGB_8888, true);

Actually it is the most discussed problem on Android-OpenCV user-group: https://groups.google.com/group/android-opencv/

The fix for this problem is already available in OpenCV trunk and will be included into the next release of OpenCV.

Also you can read image using the OpenCV API:

Mat image = Highgui.imread("/sdcard/TVguide/Detection/detected.jpg");

Answer 2

loading using OpenCV is quicker (20%-40%) than loading using BitmapFactory and transforming to OpenCV Mat

Mat image = Highgui.imread("/sdcard/TVguide/Detection/detected.jpg");