15th Feb 2024: Astro Pixel Processor 2.0.0-beta29 released - macOS native File Chooser, macOS CMD-Q fixed, read-only Fits on network fixed and other bug fixes
7th December 2023: added payment option Alipay to purchase Astro Pixel Processor from China, Hong Kong, Macau, Taiwan, Korea, Japan and other countries where Alipay is used.
Hi,
I have been having issues lately with processing in APP. Surely the issue has to be my camera. It is old, however I may just be doing something wrong during processing. I am getting a lot of noise and the gradients are really bad. I use the light pollution tool, which still cannot correct it. It does a good job removing light pollution, but the gradients just get worse. I will post a picture asap.
Thanks!
Hi @deesk06
I'm also pretty sure your issue is related to raining noise caused by hot pixels in the camera: is absolutely normal.
Even darks normally aren't able to correct it properly.
2 ways of get rid of raining noise:
- do dithering during imaging
- build a well built bad pixel map through APP (this is the way i'm following)
I'm bulding a complete darks library: each 50 gain, each exposure (from 60s to 600s), at -10 °C.
After all sequence of each darks, i let APP create master dark and BPM with the same sequence of darks: so i will have (already ready) each BPM (and master dark as well) for a combination of gain/exposure. In this way i avoid completely doing dithering in the field: so i avoid, to say, one more potential issue in the field (since problems are always at the corner..)
