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In-camera processing of long-exposure RAW data

Started Jan 21, 2010 | Discussions thread
cluna Senior Member • Posts: 1,403
Re: Algorithm successfully simulated

Yamo wrote:

or a filter - if adjacent pixels (of any channel) are also are local maxima, then don't change (there's a real peak here, not a hot pixel).

I remember doing a bracket of darkframe (on the canon) with shutter/iso to bypass any processing. I zeroed out the data to expose just the noise was. Over as sequence, could watch the heat currents in the frames moving about. In some ways the local max and frame max of the entire long exposure would average out to be the same across the frame -minus amp noise.

As for the astro use, best thing to do is shoot video with a D90/d300s/d3s and use astrostack. On static frames, the raw ability on the D300s is great for stacking to reduce noise considerably...I mean absolutely briliant results. Id love to see that on the D3s.

-C

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