Pixel value could be changed by 0-4 after compression and decompression

[xuemin-liu]

Expected behavior and actual behavior.

I made a 16 bit matrix filled with random 12 bit integers. The values in the matrix were changed by 0-4 after compression (quality 100) and decompression. I expect the final matrix should be the same as the original one.

Steps to reproduce the problem.

Compress a random 12 bit matrix and decompress the comressed matrix.
Original matrix should be as the same as decmpressed matrix.

Operating system

Ubuntu

openjpeg version

2.7-dev

[xuemin-liu]

@ValZapod Thanks for your comment. That reminded me that the code was actually for lossy compression.
The problem was in the following code snippet:
l_param.tcp_numlayers = 1; l_param.cp_fixed_quality = 1; l_param.tcp_distoratio[0] = 100;
It is still lossy compression even distoratio is 100.
I removed the above code and that fixed my problem.