|
PixInsight - Finalizing the Image |
Generalized Hyperbolic Stretch (GHS) |
updated: 2025-09-26 |
The chapter needs reworking.
picture: PIGHSMain.png - dblclick to zoom
picture: PIGHSInterface.png - dblclick to zoom
Activation: Process > Intensity Transformations > GeneralizedHyperbolicStretch
- Set the transformation to "Linear," open the "Preview" window, and then drag the triangle to the right of the graph until the "Low Clip" starts to increase from 0.
- Close the Preview and reset the GeneralizedHyperbolicStretch
- In GeneralizedHyperbolicStretch open the preview windows again and use the settings below.
Move the mouse pointer to the middle of the graph to see a yellow vertical line. This is the symmetry point. You can transfer this position to the symmetry slider by clicking the "Send to SP" button.The position of the symmetry point is crucial to image quality, which becomes apparent when you slide the stretch factor and local intensity sliders until a good image appears in the preview window.
|
GeneralizedHyperbolicStretch |
Resulting Non-Linear Image |
|
|
|
Resources:
- Installation: see GHS (Generalized Hyperbolic Stretch) Installation
- Description: PixInsight Reference Documentation | GeneralizedHyperbolicStretch
- Homepage: ghsastro – astrophotography
- Tutorial: GeneralizedHyperbolicStretch Process – Introduction - Remote Astrophotography Using Slooh.com
Created with the Personal Edition of HelpNDoc: Easily create Qt Help files