Starguide - A Practical Guide to Astro-Photography

GraXpert is designed to remove gradients from astroimages. As the name suggests, gradients are gradual changes in brightness that are not part of the astrophoto but are caused by external interference. Causes can be e.g. light pollution or incorrect or missing flat correction, but also natural brightness gradients of the night sky and peculiarities of the optics used (shading in the form of a vignette).

GraXpert is freely available open source software that was programmed exclusively for this purpose. It works stand alone, not as a plug-in for any other software.

Download from: GraXpert – A fast and easy way to remove gradients

Installation 

(stand-alone or as a PixInsight resource):

• German: GraXpert 2.0 mit AI und PixInsight - Download und Installation für Windows und Mac OS. Deutsch (youtube.com)
• English: How to Install GraXpert in PixInsight! (youtube.com)
• GraXpert 2.0 and PixInsight Script on AstroBin

When downloading and running GraXPert, you will receive some warnings from Windows.  The software will not install itself on your computer, instead GraXpert is an executable program that you can place anywhere on your system.

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