Felix K Posted July 6, 2019 Share Posted July 6, 2019 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 Quote Link to comment Share on other sites More sharing options...
Pšenda Posted July 6, 2019 Share Posted July 6, 2019 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. Felix K 1 Quote Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301 Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155. Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155. Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130. Link to comment Share on other sites More sharing options...
Felix K Posted July 6, 2019 Author Share Posted July 6, 2019 I am not using in camera Noise reduction because I am doing continuous shooting to create a star trail image. Quote Link to comment Share on other sites More sharing options...
walt.farrell Posted July 6, 2019 Share Posted July 6, 2019 According to the Photo 1.7.1 announcements (Windows, Mac): Quote RAW Hot pixel removal is now automatically performed by the Serif Labs engine. Felix K 1 Quote -- Walt Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases PC: Desktop: Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 Laptop: Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU. iPad: iPad Pro M1, 12.9": iPadOS 17.4.1, Apple Pencil 2, Magic Keyboard Mac: 2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.4.1 Link to comment Share on other sites More sharing options...
Pšenda Posted July 6, 2019 Share Posted July 6, 2019 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. Felix K 1 Quote Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301 Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155. Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155. Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130. Link to comment Share on other sites More sharing options...
Felix K Posted July 6, 2019 Author Share Posted July 6, 2019 13 minutes ago, walt.farrell said: According to the Photo 1.7.1 announcements (Windows, Mac): You are right. I was't on the newest version. It is doing a pretty good job. walt.farrell 1 Quote Link to comment Share on other sites More sharing options...
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