P: Denoise AI and Pentax K3 MKIII DNG files - not working

DxO can, so there is no reason why Adobe in principle can not

you can always get DxO PhotoLab and use it's AI/ML NR and then export DNG to be used in ACR/LR ... just like with Adobe you of course will be saddled with an extra DNG 

@JohanElzenga Raw files from the Ricoh cameras have the same issue as the Pentax that the thread is about. AI denoise does nothing to the noise in the images. Just confirmed with some files from: https://www.dpreview.com/sample-galleries/9930153897/ricoh-gr-iii-sample-gallery/6881829042 and yeah, AI denoise does not reduce the noise in those files at all either. I think perhaps the raw files on this camera are also preprocessed by the camera before writing out so AI denoise can't do its job anymore.

Wondering when can we have the AI Noise Reduction feature support for Ricoh GR III and GR IIIx?? Now its not working at all.

Sorely missed, as the manual options arent doing good enough with these rather noisy sensors at night (otherwise brilliant IQ cameras)...

Thanks!

Would be good if Lightroom threw up an error right now but there is an official statement pinned by Rikk above:

"Note:  a change is required by the manufacturer before this issue can be resolved. "

So there must be some issue with the pentax files that prevents AI denoise from working on these. I have no clue what that could be but it must make the noise behave completely differently from normal. It does indeed look very differently in character than what I see from my cameras in the files posted here which all show noise limited by the physics of the image capture process which means it must be preprocessed somehow by the pentax cameras. Topaz is surprisingly bad too (although a tiny bit better than Adobe's denoise but far worse than similar files from my cameras) at removing noise from these files. This means something is different about them indeed that doesn't correspond to normal noise in such files.

I fully agree with that but that will not happen. Hopefully we still can use Topaz Denoise on non-RAW file, but that would be nice to have an official statement from Adobe because at the moment Lightroom do not display any error or warning, but just do nothing on the output.

fotonor: ok, that makes sense - thanks for the explanation!

The "easy" thing to do, was that Pentax made this inbuilt noise suppression on raw files optional. I dont need my camera to remove noise when PC software is better at it.

The older cameras you mention, have raw files with raw data. They have a noise profile which is identical to all other cameras which output raw data. The new situation with K-3 III (and a few other Pentax models) is that they have inbuilt noise suppression. That means the raw data in the dng file is not "raw" anymore, but processed and have a completely different noise than K-50. The result of this is that the AI algorithm has to be trained to be able to recognize the noise from K-3 III and which is unique to K-3 III. 

For Adobe, this means they have to train AI for a specific camera modell instead of using a generic model that works for all cameras without inbuilt noise suppression. That is not an easy task.