Writing jpeg 2000 images with 16 bit

edit

Hi all,

I know there has been a post about OpenCV's issue with writing jp2 images with 16 bit depth, but I'm posting this here in case there has been a workaround since the last post. All I did was to read a 16-bit png image and write it back in jp2 format. Here's the code:

Mat readMat = imread("pnggrad16rgb.png", IMREAD_UNCHANGED);
imwrite(string("pnggrad16rgb.jp2"), readMat);

The image pnggrad16rgb.png was downloaded from here:

http://www.fnordware.com/superpng/sam...

The resulting pnggrad16rgb.jp2 image is just a completely black image of the same size as the original image (I viewed it in Gimp 2.8).

Has there been a workaround to this issue?

Thanks, Fijoy