I am pleased to announce the release of Generalised Hyperbolic Stretch (GHS) V2.2.0.

GHS is a Pixinsight script that provides an integrated environment to facilitate the design, appraisal and application of stretches to your images.  The script helps avoid star-bloat and allows highly targeted addition of contrast throughout your images.

The principal new feature in this version is the addition of a comprehensive pixel enquiry facility on the preview image.  By clicking anywhere on the preview, you will see a readout for pixel values in the area you have clicked.  This can be used directly to set relevant parameter values for your stretch.  In this way you can design your stretches in a far more intuitive and precise way to achieve the exact results you want. 

More detail on the new features is available on the GHS website (https://www.ghsastro.co.uk/v2-2-0-notes/) and via the tooltips from within the script.  A tutorial video is also in the process of production and will be available shortly. If you have the GHS repository (https://www.ghsastro.co.uk/updates/) set up in your list of managed repositories, then you will pick up the new version next time you start up Pixinsight.  If you prefer to install manually, the files are available at the GHS Github repository (https://github.com/mikec1485/GHS/releases/tag/v2.2.0/). 

As ever, feedback is always welcome. 

Also, David Payne and I have been invited on to The Astro Imaging Channel on YouTube for a live show presenting GHS on 29 May 2022.  Building on a brief explanation of the fundamentals of image stretching, we will be exposing the “secret weapons” of GHS and demonstrating how these have been implemented in the new GHS V2.2.0 to allow creation of “designer stretches”.  The live show starts at 9:30pm EDT, or if that time doesn’t suit, it will be available afterwards for view at the TAIC YouTube channel (https://www.youtube.com/c/TheAstroImagingChannel/). 

Happy stretching and clear skies. 

Mike Cranfield
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