In simpler PixelMath terms (assuming you have a reference image open): [ \textLinearFit(ReferenceImage, TargetImage) ] Note: This is not a real function. You must use the LinearFit process. Do not attempt to type this manually unless using the $T symbol.
Note: You must replace med(Tar) and stddev(Ref) with actual numeric values from the Statistics process, as PixelMath cannot read image metadata directly in a single line. pixinsight lerar link
A: No. For less than 10 subs, or for narrowband under dark skies, LN is optional. For wide-field mosaics or broadband under variable transparency, LN is essential. In simpler PixelMath terms (assuming you have a
Once linear processing is complete, the image must be permanently stretched. Histogram Transformation : The manual method to "bake in" the stretch seen in STF. Easy Soft Stretch : Part of the Easy Processing Suite Note: You must replace med(Tar) and stddev(Ref) with
, a critical phase in astrophotography processing where data remains mathematically proportional to the light captured by the sensor. Understanding Linear vs. Non-Linear Data