Image shot at 4000 ISO will more closely resemble an image captured at 500 ISO in terms

Routinely gives photographers improvements of more than 2.5 stops. I measured SNR on the same test shots I sent to Bill for Photonstophotos and also measured other shotsĬlick to expand.Yes but it does not say of what.ĭeepPRIME XD uses a neural network trained using billions of image samples and On larger format the limit is the sensor itself not the bit depth so the effect is less apparent when you look at SNR=20 but it is when you look at SNR=1 (DxoMark) However when you look at the ISO 200 value you see that the DR is maxed out at 12.3 this is because the read noise in electrons goes sub bit level but it cannot go to far currently 12.6 is the max you get Panasonic GH5M2 and G9 so the maximum DR is limited by the bit depth on the MFT sensor size So there is no way you can make a shot at ISO 6400 identical to one taken at 200 While software can reduce the read noise and even address some other noise sources nobody is going to give you back the light you did not collect as you increased gain

You see that the issue between ISO 2 is not the relative noise this actually drops but the fact that the actual electrons collected drops a lot which in turn makes the DR drop When you look at the input referred noise chart for OM-1 on the same site you get some more insight This is one method but not an industry standard hence there is a reconciliation with DxO Mark etc The idea was to have something that was able to simulate perception when looking at a print a certain distance. PDR looks at number of stops with SNR=20 on a test chart this is not something DxO or anyone else is concerned. I think you confuse PDR with actual noise reduction they are not the same thing So if you take a shot at ISO 800 and put it through DxO the SNR of that shot is improved up to 2.5 stops What DxO does is not to close the gap between ISO but improve the shot taken at a certain ISO. Click to expand.I measured SNR on the same test shots I sent to Bill for Photonstophotos and also measured other shots

Dxo denoise