Sample file channel names don’t match standard

[tshead]

I’m implementing Cryptomatte support for Imagecat (https://imagecat.readthedocs.io), and noticed that the channel names in the sample files (e.g. bunny_CryptoMaterial.exr) spell out the colors:

• uCryptoMaterial00.red
• uCryptoMaterial00.green
• uCryptoMaterial00.blue
• uCryptoMaterial00.alpha

while the standard calls for single characters:

• {typename}00.r
• {typename}00.g
• {typename}00.b
• {typename}00.a

I could code around this in various ways, but what’s the right approach? It would be good to update the standard or the sample files.

Many thanks, Tim

[cedricduriau]

Hi @tshead

Thanks for taking the time and effort on implementing it for Imagecat. In which context are you using it and would like crypto for it, if I may ask out of pure curiosity?

For the Fusion implementation, this is something I specifically cover. Any channel name will be transformed to it's lowercased form, followed by a short and long form match of the respective channel names.

Cheers Cedric

[tshead]

Cedric:

OK, so arguably the standard should reflect this.

My colleagues and I are using cryptomatte for experiments in machine learning, so we needed a workflow that was completely open-source for reproducibility.

Regards, Tim