chromatic noise OSC how to handle

[squreshi786]

Hi guys
This is almost 4 hours of dithered data with 10minutes of individual subs at -20 with an ATIK 314l COLOUR camera. After DBE, Neutralisation and colour calibration this is what I get. But I am then stuck as too how to get rid of this chromatic mottling that I see in the background. My next step usually would be to change it to nonlinear state and adjust with curves and do noise reduction, unless you suggest another way.

[mricard]

Hi,

Another way to reduce the noise is to make a copy of your image,  stretch it and use it as a luminance mask before using Multiscale Linear Transformation. I'm curions what is the focal ratio of your scope ?

Marc

[squreshi786]

its F8

[mricard]

Well you're tracking and focus look decent, you just need more data to increase the signal to noise ratio.

clear skies,

Marc