Fundamentals · PixInsight
BackgroundNeutralization
BackgroundNeutralization adjusts the colour channels so that the background of a colour image becomes neutral (R ≈ G ≈ B). Unlike a colour …
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Fundamentals · PixInsight
BlurXTerminator (BXT)
BlurXTerminator (BXT) is a deconvolution: it estimates how optics, seeing and tracking blurred the image and computes that blur out. Star …
Fundamentals · PixInsight
CurvesTransformation
CurvesTransformation maps every input value to an output value along a curve. This allows contrast, saturation and hue to be changed in …
Fundamentals · PixInsight
GeneralizedHyperbolicStretch (GHS)
GeneralizedHyperbolicStretch (GHS) turns linear data into a visible image. Unlike a fixed curve, GHS lets you decide around which brightness …
Fundamentals · PixInsight
GradientCorrection
GradientCorrection (GC) builds a smooth model of the background gradient and subtracts it from the linear image. Structure protection …
Workshop · PixInsight
HaLRGB workflow
Processing L, R, G, B and Ha exposures from a monochrome camera, from stacking to export. Ha strengthens the nebula in the red channel and …
Fundamentals · PixInsight
LocalHistogramEqualization (LHE)
LocalHistogramEqualization (LHE) spreads the brightness values of each pixel’s surroundings. Structures that differ only slightly from …
Fundamentals · PixInsight
LRGBCombination
LRGBCombination combines a separate luminance with a colour image. The luminance provides brightness, structure and sharpness, the colour …
Fundamentals · PixInsight
Matching luminance and colour image
Before a separate luminance is combined with a colour image, the brightness of both must match. The procedure measures at fixed spots, …
Fundamentals · PixInsight
MorphologicalTransformation
MorphologicalTransformation changes structures by their shape. In astrophotography it is used mainly for star reduction: stars shrink from …