Preprocess
Reduction of lens vignetting
In Nebulb you have a tool for correcting the vignetting introduced by the lens. And as with the reduction of chromatic aberration, the reduction of vignetting is also based on an estimation made directly on the image itself (no preset value is used ...
Reduction of chromatic aberration
Within the "Preprocess" module you also have a utility to reduce the chromatic aberration of the image before stacking. In Nebulb the chromatic aberration reduction is made based on an estimation made directly on the image itself (no preset value is ...
Color noise reduction
This second option that Nebulb has to reduce noise is generally used as a complement to luminance noise reduction (which is more effective and affects less the color of the stars), that is, color noise reduction is usually interesting to apply in ...
Luminance noise reduction
Of the two noise reduction options that Nebulb has (pre-stack) the one that is usually most effective (and convenient) is luminance noise reduction. Despite its name ("Luminance Noise") this option serves both to slightly reduce the luminance noise ...
When to apply noise reduction before stacking (preprocessing)
In Nebulb you have two options to reduce noise in images before stacking: Luminance noise reduction Color noise reduction But why would it be necessary to reduce noise before stacking if stacking is the best technique to reduce noise? Well, actually ...
"Preprocess" module
In the left tool panel is the "Preprocess" module, which contains a number of utilities to improve the image before stacking (noise reduction, chromatic aberration and vignetting). IMPORTANT: The utilities of the "Preprocess" module are always ...