In-camera processing of long-exposure RAW data

Started Jan 21, 2010 | Discussions thread
Thom Hogan Forum Pro • Posts: 13,659
Re: and now Ladies Gentlemen & Moon Maids... The Next Question is ?...

geo444 wrote:

is that bad median filter algorithm applied by NiKon BEFORE writing the NEFs :

  • 1 Hardware implemented ?... inside the low level DSP ??... Aie !!!

To my knowledge, it is applied by the ASIC after the initial data is put into the buffer as a "file" but before the file itself is stored on the card. That's why it used to be that you could invoke Long exp NR and interrupt that to get the original data intact: the file was there, but it hadn't been retouched by the ASIC yet.

Even if we can convince Nikon to change the algorithm, I don't think this is going to be a firmware update type issue.

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Thom Hogan
author, Complete Guides to Nikon bodies (21 and counting)

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