Banding with IPP2 Gamut Mapping in RCM

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AlanLouisGordon

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  • Joined: Fri Jun 27, 2014 5:07 am

Banding with IPP2 Gamut Mapping in RCM

PostMon Aug 27, 2018 7:48 pm

I've noticed that R15's implementation of the IPP2 gamut mapping in Resolve color management can cause banding in the image.

I was testing it out and was noticing some weird behavior in the image that I do not see when using the RCX generated LUTs.

RCM:
Image

LUT:
Image

R3D decoding is set to 16 bits, full res premium. Performance mode off. Tetrahedral LUT interpolation, but using RCM it should not affect the results.
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Peter Chamberlain

Blackmagic Design

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Re: Banding with IPP2 Gamut Mapping in RCM

PostTue Aug 28, 2018 7:58 am

Can you post a link to your images, and you system details?
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AlanLouisGordon

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Re: Banding with IPP2 Gamut Mapping in RCM

PostTue Aug 28, 2018 4:14 pm

Peter

I reached out directly to support via email, but here is a dropbox folder with the images as well as a DRP showing the artifacts very clearly. There are also resolve logs there as well.

https://www.dropbox.com/sh/1qg504bf3v53 ... g3usa?dl=0
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Peter Chamberlain

Blackmagic Design

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  • Joined: Wed Aug 22, 2012 7:08 am

Re: Banding with IPP2 Gamut Mapping in RCM

PostWed Aug 29, 2018 1:51 am

Thanks
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