Lightroom: Nikon D7000 sensor creates unfilterable "warm pixels." Is there a way to remove "hot pixels" from raw files?

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  • Updated 7 years ago
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Hi,

I have been referred here from the Adobe forum: http://forums.adobe.com/message/3824928

The problem is that the sensor of the Nikon D7000 appears to have a tendency for "warm" pixels that appear as a very bright/hot subpixel surrounded by 3 or 4 darker subpixels of the same color. Lightroom is unable to filter those artifacts as noise.

The problem appears to occur frequently with that camera, so aside from trying to goad Nikon into remapping or even sensor replacement (both of which has failed to work in the past), it might be good to have a filter for those, or at least a static dark frame to use as filter/mapping source.

Example images are here:

http://dl.dropbox.com/u/36569220/DSC_... (actual image)
http://dl.dropbox.com/u/36569220/DSC_... (lenscap)

I'm also taking this up with Nikon to see if I can get some relief under warranty.
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Nicos Gollan

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Posted 7 years ago

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Benjamin Warde, Employee

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Official Response
Hi Nicos,

OK, here's the issue: Lightroom is not successfully removing these hot pixels because these aren't normal hot pixels. They're "paired" hot pixels. That is, two adjacent pixels will become hot/stuck at the same time. Our current logic only detects and removes isolated hot pixels, where a single pixel is statistically different than all of its neighbors (whereas in this case one of its neighbors has the same local statistics).

We are looking at the possibility of expanding the hot pixels detection logic to include pixel pairs. Thanks for bringing this to our attention.

-Ben