重定向 libpng 警告 C++

Question

I'm trying to create a program in c++ using libpng, it just compares images and does stuff with it, my problem is that libpng sometimes shows a warning (libpng warning: iCCP: known incorrect sRGB profile), I know how to solve it using ImageMagick library and an external script, what I want to know is if a) Can I redirect that warning? I tried redirecting cout, clog and cerr but the message still prints (I tested it and it blocks any other print I try), and b) Is there a way correct the warning using Opencv2 and c++?

EDIT: After looking at png_set_error_fn() and finding out there's no way for me to use it with opencv2, I looked for the buffer that uses libpng to print errors and warnings, it uses stderr and redirected it using:

    const char* nullStream = "/dev/null";
    #ifdef "WIN32"
    nullStream = "nul:";
    #endif
    freopen(nullStream,"w",stderr);

Answer 1

After a quick Google, seems like libpng supports redirection of errors and warnings into your own callback, png_set_error_fn is the setter you are looking for.