R3 NR ongoing, R6 NR results

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EthanCam Regular Member • Posts: 110
R3 NR ongoing, R6 NR results
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Hello,

Just to grab your attention on the following (technical) thread in another forum that could be interesting to some of you:

R3 NR analysis (ongoing)

What's peculiar about the R3 is its apparent "triple gain signature":
https://www.photonstophotos.net/Charts/RN_ADU.htm#Canon%20EOS%20R3_14
which could very well be another layer of noise reduction. Maybe NR analysis will tell.

Shameless plug, but in the same thread I posted my R6 NR analysis results that I think are interesting, for comparison:

R6 NR analysis results

The analysis was based on a R5/R6 NR discussion started over a year ago: https://www.dpreview.com/forums/post/64238847

What's interesting is that on the R6 (R5?) NR seems to be noise dependent (rather than signal dependent), but in a "counter-intuitive way": less noise at the pixel level leads to stronger noise reduction than higher noise does.

As a consequence, it's the dark values at low noise levels that are the most affected by noise reduction. Unsurprisingly, this affects some of sensor performance metrics reported say on p2p.net. For example, the "true" PDR of the R6' sensor at ISO100 is about 2/3 less than the 11.13 reported, etc.

Similar to baked-in lens corrections, I guess many end users don't care much about baked-in raw processing, but it's still interesting to know how things work

Cheers,

Ethan

Canon EOS R6
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