D7200 HPS (hot pixel suppression) news

Started Dec 8, 2015 | Discussions thread
OP Bernard Delley Senior Member • Posts: 2,178
Re: High ISO Noise Reduction only for jpg

bclaff wrote:

Bernard Delley wrote:

to the best of my own + forum knowledge there is no such high ISO denoising with Nikon. (Sony cameras have been known for such denoising applied to a then ironically called "cooked raw") . Nikon high ISO NR applies to jpg only, 'long exposure NR' is a built in black frame subtraction which can be turned off by the user. This subtraction requires a wait time equal to exposure time: potentially annoying.

Nikon does have High ISO Noise Reduction that can be controlled by the user and can be set to OFF.
When it is active it affects NEF as well as JPG files.

I checked High ISO Noise Reduction "High" against "Off" on NEF black frames at ISO 1600 from 20s to 1/40s. I could not detect any significant difference. If you still think " High ISO Noise Reduction" would affect the NEF,, please give a hint at exposure conditions ISO, time +?? where one should be able to verify the effect.

This is separate from the Long Exposure Noise Reduction (LENR) that you mention.

Here's an example I documented for the D90: D90 Does Noise Reduction on NEFs at Longer Exposures

I have no direct access any more to a D90. The D90 HPS like for other cameras of that period was arguably too aggressive, and thus may have produced noticeable noise reduction as a side effect. I recall that its HPS was turned on near 1s exposure time, which would be consistent with your cited result.

The D7200 HPS only affects a relatively small number of very 'noisy' pixels. Here the HPS effect on noise is about 0.3% reduction of noise RMS.

 Bernard Delley's gear list:Bernard Delley's gear list
Olympus TG-6 Nikon D7200 Nikon D500 Nikon D850 Nikon Z7 II +19 more
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