1

In the context of ASC-CDL, saturation is applied as:

luma = 0.2126*iR + 0.7152*iG + 0.0722*iB
oR = luma + saturation*(iR-luma)
oG = luma + saturation*(iG-luma)
oB = luma + saturation*(iB-luma)

However, in the ARRI Look Files in the ALEXA Camera whitepaper they say:

Note: The ALEXA saturation parameter differs from the ASC CDL saturation.

But they don't specify in what way, and I can't find that information anywhere.

Does anybody know?

2

I would imagine it has something to do with the white point/primary chromaticities are Alexa Wide Gamut vs. Rec709.

http://www.arri.com/camera/alexa/learn/log_c_and_rec_709_video

  • Welcome to Video Production on Stack Exchange. That made an interesting read. Also enjoyed checking out your demo reel. – AJ Henderson May 17 '14 at 2:24

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.