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SHO Green Colour Adjustment Tools Using PixInsight and Affinity Photo
SHO Green Colour Adjustment Tools Using PixInsight and Affinity Photo
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New Tutorials
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Enhance your Siril Post-Processing with GIMP
Enhance your Siril Post-Processing with GIMP
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In this tutorial series, Telescope Live Co-Founder Alexander Curry explores GIMP, a free and powerful image editor, as an alternative to paid software like Photoshop and Affinity Photo. He demonstrates how GIMP can be used alongside SIRIL to enhance astrophotography images. Key topics covered include:
GIMP Interface and Essential Tools:
- Navigate the workspace, customize dockable dialogues, and understand layer management.
- Explore color correction, histogram adjustments, and selection tools.
Integrating GIMP with SIRIL:
- Perform initial stacking, star removal, and background calibration in SIRIL.
- Use GIMP for color balancing, noise reduction, and selective enhancements.
Final Adjustments and Star Recomposition:
- Reintegrate stars, refine contrast, and apply sharpening filters.
- Utilize GIMP’s built-in noise reduction and color grading tools for finishing touches.
This tutorial provides an accessible yet powerful approach to astrophotography editing using free software.
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Our tutors
Peter Jenkins
Amateur Astrophotographer & Fellow of the Royal Astronomical Society specialising in Nebulae mostly presented using the Hubble Palette
- Astrophotographer
- Tutor
Adam Block
FastTrack your understanding of the HOW and WHY of astronomical image processing with renowned Adam Block.
- Astrophotographer
- Tutor
Stellar Xperiences
Three astrophotographers with 30 years’ combined experience in photography and 20 years’ experience in astronomy.
- Editor
- Tutor
Warren Keller
A US-based, multi-APOD imager and author with over twenty years' experience.
- Astrophotographer
- Tutor
James Ritson
UK-based photographer and image retoucher working with Affinity Photo
- Astrophotographer
- Tutor
Mustafa Aydın
An astrophotographer with 8+ years of experience and an almost lifelong background in general photography.
- Astrophotographer
- Tutor
Bernard Miller
A US-based, multi-APOD astrophotographer with over twelve years of experience in deep sky imaging
- Astrophotographer
- Tutor
Ryan Voykin
US Based Amateur Astrophotographer and Creator of the YouTube Channel DarkRangersInc.
- Astrophotographer
- Tutor
Masters of PixInsight
Join MoP's team for streamlined PixInsight expertise, ensuring clarity and simplicity.
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Jarmo Ruuth
Amateur astrophotographer, author of AutoIntegrate and Astro Mosaic.
- Astrophotographer
- Tutor
Alexander Curry
European based amateur astrophotographer, Co-Founder of Telescope Live and Fellow of the Royal Astronomical Society
- Astrophotographer
- Editor
- Tutor
Mark Johnston
I have been fascinated by the night sky since I ‘discovered’ Saturn with my 60mm refractor at the age of 10. An APOD-winning astrophotographer, I have been published in Sky & Telescope, Astronomy Magazine, and Space.com. As a NASA Solar System Ambassador, I have conducted thousands of public outreach programs and am a registered cruise ship speaker on astronomy and space science, as well as a Director of the Phoenix Astronomical Society. I frequently post astrophotography images, news, and tutorials on social media. My solar imaging and videos are particularly popular, and I have conducted extensive research on solar cameras and solar image processing techniques.
- Astrophotographer
- Tutor
Damian Peach
A multi-award winning astrophotographer with over 25yrs experience.
- Astrophotographer
- Tutor
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Generalized Hyperbolic Stretch - An Improved Way to Stretch Your Images in Pixinsight
Generalized Hyperbolic Stretch - An Improved Way to Stretch Your Images in Pixinsight
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Generalized Hyperbolic Stretch or GHS is a Pixinsight script designed to give you a new and improved approach to stretching your astrophotography images in Pixinsight. Adam Block will cover installing the script & module, the basics of the interface, the core principles of GHS, and the several use cases for this script.
To install GHS, follow the instructions below:
1) From within Pixinsight, go to: Resources > Updates > Manage Repositories
2) In the Manage Update Repositories dialog, click the Add button
3) In the URL box, type the GHS repository information as follows: https://www.ghsastro.co.uk/updates/
4) In the Add Pixinsight Repository dialog, click the OK button
5) In the Manage Update Repositories dialog, click the OK button
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StarXterminator and Affinity Photo
StarXterminator and Affinity Photo
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In this tutorial, Nik Szymanek walks us through the StarXterminator plugin in Affinity Photo
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All Tutorials
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Multi-Camera Final Refinements in Affinity Photo: NGC 6744 Processing
In this final part of the NGC 6744 tutorial, Telescope Live tutor Nik Szymanek completes the image processing workflow by applying cosmetic corrections and color refinements in Affinity Photo. Key steps include:
Combining Luminance and RGB for LRGB Processing:
- Convert the luminance image to a 16-bit RGB file and merge it with the RGB image for enhanced detail.
- Flatten the image and export it as a high-quality TIFF file.
Gradient Removal and Star Integration:
- Extract stars using PixInsight’s Star Exterminator and process them separately.
- Use Graxpert AI for automatic background gradient removal before reintroducing stars.
Final Color and Detail Enhancements:
- Apply Tone Mapping for subtle contrast boosts in the galaxy without affecting the background.
- Use Selective Color and Clarity tools to refine spiral arm structures and highlight Hα regions.
This final stage brings out the full depth and color of NGC 6744, wrapping up a comprehensive multi-software workflow.
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Post-Processing Multi-Camera Data in PixInsight - NGC 6744
In this follow-up to the stacking multi-camera data tutorial of NGC 6744, Telescope Live tutor Nik Szymanek expands on the dataset integration process, moving from Astro Pixel Processor (APP) to PixInsight for advanced image refinement. Key steps include:
Finalizing Stacking and RGB Combination in APP:
- Integrate all CCD and CMOS frames to produce high-quality LRGB masters.
- Use Multiband Blending (MBB) to seamlessly merge different datasets.
Processing in PixInsight:
- Crop Luminance and RGB images to a uniform size using Dynamic Crop.
- Apply BlurXTerminator to enhance detail through deconvolution.
- Use Gradient Correction to remove residual sky gradients.
Noise Reduction and Image Scaling:
- Utilize NoiseXTerminator AI3 for effective noise suppression with real-time previews.
- Adjust histogram settings to control brightness and preserve background details.
This tutorial sets the stage for the final enhancements in Affinity Photo, covered in the next tutorial.
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Stacking and Integrating Multi-Year Datasets in Astro Pixel Processor
In this tutorial, Telescope Live tutor Nik Szymanek demonstrates how to combine astrophotography datasets taken years apart with different cameras using Astro Pixel Processor (APP). This method enables seamless integration of large datasets while maintaining high image quality. Key steps include:
Loading and Organizing Data:
- Import and analyze datasets captured with an FLI PL9000 CCD and a QHY 600M CMOS camera.
- Understand how APP handles different sensor sizes and orientations.
Calibration and Registration:
- Use APP’s Analyze Stars tool to assess sub-exposure quality and remove outliers.
- Fine-tune registration settings to align frames from different imaging sessions.
Stacking and Color Combination:
- Normalize images to correct background variations across multiple nights.
- Use Multiband Blending (MBB) and RGB integration tools to generate the final color image.
This tutorial provides a step-by-step workflow for integrating diverse imaging data into a high-quality astrophotography result.
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Streamlining Data Stacking with Fast Batch Pre-Processing
In this tutorial, Alexander Curry, Co-Founder of Telescope Live, introduces the Fast Batch Pre-Processing (FBPP) script in PixInsight, designed to speed up the data stacking process while maintaining high-quality results. Key points include:
FBPP vs. Weighted Batch Pre-Processing (WBPP):
- Learn how FBPP reduces processing times significantly—handling large datasets in minutes compared to hours with WBPP.
Simplified Workflow:
- Explore how to efficiently configure FBPP for bias, dark, and flat frames. Understand grouping keywords and automatic integration options for seamless stacking.
Comparison of Outputs:
- See a direct comparison between FBPP and WBPP results, including master frame quality, noise levels, and processing differences.