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Hello,

 

I recently took images of the night sky and my camera has quite a lot of Hot Pixels when doing a long exposure.

I recorded Dark Frames with the exact same settings and I want to know: How do I process them?

Is there a way to efficiently remove hotpixels? Does anyone have advice in general?

 

Felix

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4 hours ago, Felix K said:

How do I process them?

Hot pixel reduction should be done by the camera before image data is processed.


Affinity Store: Designer 1.7.2.471, Photo 1.7.2.471, Publisher 1.7.2.471.
Windows 10 Pro, Version 1903, Build 18362.295.
Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080.
OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080.

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I am not using in camera Noise reduction because I am doing continuous shooting to create a star trail image.

 

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According to the Photo 1.7.1 announcements (Windows, Mac):

Quote

RAW

Hot pixel removal is now automatically performed by the Serif Labs engine.

 


-- Walt

Windows 10 Home, version 1903 (18362.239), 16GB memory, Intel Core i7-6700K @ 4.00Gz, GeForce GTX 970
Affinity Photo 1.7.2.471 and 1.7.2.464 Beta   / Affinity Designer 1.7.2.471 and 1.7.2.4464 Beta  / Affinity Publisher 1.7.2.471 and 1.7.2.458 Beta

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13 minutes ago, Felix K said:

Noise reduction 

Noise reduction and Hot pixel reduction is different functions. Of course, it depends on the camera whether and how it is implemented, but the hot pixel reduction is as you described in the first post (two exposures under the same conditions - same setting and same time), but the reduction is done before the actual image data is processed. Doing it after processing images will not produce such results.


Affinity Store: Designer 1.7.2.471, Photo 1.7.2.471, Publisher 1.7.2.471.
Windows 10 Pro, Version 1903, Build 18362.295.
Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080.
OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080.

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