silikoncigar.blogg.se - Removing dark noise

However even dithered images can show walking noise depending on the scales of the correlated noise and the dither. Dithering certainly helps and should always be done. Whenever the topic of walking noise comes up, there is a chorus of people who say that dithering is the solution. It takes a span of geological time and results in a file that's about half a gigabyte, but might be worth it. Mark, Deep Sky Stacker has a 2x2 drizzle option for drizzle stacking. Finer granularity noise is easier to remove with noise reduction. I recommend Bayer drizzle stacking because it leads to finer granularity noise in the stack.

This is an unfortunate side-effect of the spatial filtering that's applied to the raw data but changes from model to model. Dark subtraction and/or dark optimisation is not very effective on some Nikon DSLR cameras.

Use good noise reduction on the final stack.

Use bayer drizzle stacking with sigma rejection and play with the pixel rejection parameters (again assuming it is available).

Use dark optimisation (assuming it is available in your processing suite).

It could be important but for now I'll assume you are using a one shot colour camera.įor most one shot cameras you need to do all the following: I don't think you indicated what camera you are using.