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Some follow ups

I am not clear if my earlier follow up was actually posted. So apologies for a repeated post.

The link you had sent me was really helpful. I think I now understand how the cam_xyz, rgb_cam, cam_mul and pre_mul matrices work.

However, the code referenced in the link appears to be older and hence does not contain any reference to ccm. Also, the link does not contain any information/comments about cmatrix.

I just noticed from the latest code that appears to populate cmatrix primarily through calls to cam_xyz_coeff.

Would appreciate any help about these two matrices (ccm and cmatrix)?