Photographic Dynamic Range (PDR) is a More Useful Measure than the DxOMark Landscape Score

Started Apr 17, 2015 | Discussions thread
Horshack Veteran Member • Posts: 7,915
Re: Photographic Dynamic Range (PDR) is a More Useful Measure than the DxOMark Landscape Score
3

Detail Man wrote:

bclaff wrote:

... The PDR criteria operates in the PTC region well above SNR=1 (at least until we get 384Mp sensors!).

In this region the subtle interplay of read noise, other noise, small amounts of photon noise, slope due to Full Well Capacity (FWC), etc. is captured.

It seems that (especially thses days, with higher performance image-sensors), Readout/Dark noise component are effectively "numerically swamped" by Photon Shot Noise. Rather "subtle", indeed.

But there's a distinct qualitative difference of read noise vs shot noise. John Sheehy once posted a simulation of an ISO 1,000,000 image with zero read noise and it looked more natural than a much lower ISO image with read noise.

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