@terfendail please take look at this

@savuor are we sure this is an actual bug?

I took this comment from the history of the issue

I think this has been implemented correctly. OpenCV uses YCrCb whereas Matlab uses YCbCr.

@StevenPuttemans

• I will not touch YCrCb implementations, they seem to be correct
• I didn't fix the channel order yet (this is gonna be YVU as it's done now in OpenCV which corresponds to YCrCb). However, the channel order in OpenCL implementation is YUV, not YVU, it means that I should change the channel order at least there.

Anyway, there are real bugs in the way how channels in YUV are calculated, the bugs are described here.
To illustrate the first bug just take look at the pictures below.

This is source image.

This is correct Y channel (as we get from YCrCb conversion).

And this is a Y channelf from YUV conversion:

Why do I think it's incorect? Because red birds are darker than blue ones although both Y channels should be the same.

I also confirmed other 2 bugs and gonna fix them too.

👍

thanks, @savuor! let's finally merge it in! 👍