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Canon EOS R3 Baked in Raw Noise Reduction Revisited

Started Jan 21, 2022 | Discussions thread
Tristimulus Veteran Member • Posts: 9,998
Re: Canon EOS R3 Baked in Raw Noise Reduction Revisited

bclaff wrote:

Tristimulus wrote:

bclaff wrote:

Tristimulus wrote:

KZ7 wrote:

These findings are interesting from a technical perspective.

The main questions I have is how much difference does this make to the level of detail in the raw files compared with for instance the Leica and what are the benefits / drawbacks of doing this?

In real world use, will we even notice?

Engineers fine tune the output from every camera. The goal is to produce good looking and easy to post process images. Guess we do notice even when we are not aware of noticing.

Completely uncooked RAW files are ugly and need a lot of additional post processing. Some who want uncooked RAW do probably not quite know what they wish for.

FWIW, I have tested over 400 camera models and "cooked" raw files are the exception not the rule. The vast majority of the raw files I encounter have no detectable signal processing.

Have had some astronomical CCD cameras where differences in photosite sensitivity, colomn errors, hot and dark pixels were part of the RAW files. Had to be corrected. Not so with any of the ordinary stock cameras with CCD sensors I did use.

RAW files from CMOS astro cameras look more like ordinary stock cameras. Even onion rings, polygons and traces of scaling and shading correction seems to be baked in the RAW files. The cameras are low end astro cameras as the real stuff cost $10 000 ++ apiece.

But you are the expert here, I am not.

Just wondering - how do you know that there is no on chip processing going on?

"Hot" pixel mapping etc. certainly happens.
Normally lens distortion correction etc is deferred.

In any case, the signal processing that matters in my testing is that which is applied to all pixels (as opposed to "hot" pixel mapping for example).

Thank you for responding. Illuminating answer.

You do great service to the photo community - no offence intended.

Keep up the good work!

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