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Multi-Camera Final Refinements in Affinity Photo: NGC 6744 Processing
Multi-Camera Final Refinements in Affinity Photo: NGC 6744 Processing
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Post-Processing Multi-Camera Data in PixInsight - NGC 6744
Post-Processing Multi-Camera Data in PixInsight - NGC 6744
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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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Bernard Miller
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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.
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The Ultimate Astrophotography Toolkit for Beginners
The Ultimate Astrophotography Toolkit for Beginners
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Introducing the Ultimate Astrophotography Toolkit for Beginners: a FREE Video Series That Will Open the Gates to the World of Astrophotography - No Experience Needed
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ATTENTION: To download the Siril scripts, scroll down this page till the specification list. You will find the download button under “Associated dataset”. Now click on the Download button. You will be redirected you will be redirected to our forum where you can download the zip file of the scripts. Follow the instructions contained in part 2 of this video series to learn how to use them on Siril.
Part 1: SIRIL is the most powerful tool for both new and veteran astrophotographers, in addition to being free and open source it has many tools and features that make it ideal for astrophotographers getting started. In this video we’re going to download SIRIL and pick out a suitable one-click observation to download. It’s everything you need to get started with this tutorial series.
Part 2: Scripts are a very important part of processing your Telescope Live images, this video will show you how to easily integrate scripts into your SIRIL workflow to make registering and stacking your Telescope Live images much easier. Additionally we will have a look at the various framing tools and different types of data that these scripts can work with.
Part 3: One thing every astrophotographer needs to know is histogram manipulation. In this video we will look at two different methods for histogram manipulation to get the most information out of your data. This video will take the newly created colour images (thanks to the scripts) and turn them from a few stars into a magnificent astrophoto.
Part 4: After you’ve brought your image to life with some histogram stretches, you’re going to want to make sure your image is colour accurate. This video will show you how to process the green noise out of hubble palette images, as well as a colour correction method that can be applied to all astro images. Finally we will enhance the saturation to enrich the colours within your image.
Part 5: A quick sidestep here to StarNet ++; this powerful tool allows you to completely remove the stars from any nebulae image. While it is personal preference, in this tutorial we’re going to be applying this process to our image to focus solely on the nebulosity.
Part 6: Finally to wrap up, we’re going to look at a very easy to use sharpening tool to further enhance the details in your astro image. This powerful tool is very easy to use and can be used for most astro images. Finally we’re going to crop and frame our image to a region of interest and post it on the Telescope Live gallery.
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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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Integrating Ha Data with Continuum Subtraction
In this tutorial, Telescope Live Co-Founder Alexander Curry, demonstrates how to enhance RGB images by using Continuum Subtraction with SIRIL. This advanced technique adds depth and detail to astrophotography images. Key steps include:
Preparing the Data:
- Organize and preprocess your Hα and RGB data, including optional steps like gradient extraction, deconvolution, and cropping to ensure alignment.
Continuum Subtraction with Pixel Math:
- Use pixel math expressions to isolate Hα data from the red channel, fine-tuning the Q-factor to balance Hα integration while maintaining image integrity.
Recombining Hα into RGB:
- Reinsert the processed Hα data into the RGB image using pixel math, gradually increasing the Q-factor to achieve optimal enhancement without overpowering the image.
This tutorial will give you a step-by-step guide to this powerful method, enabling you to produce stunning, detailed images by blending narrowband and broadband data.
Pixelmath expressions used:
Creating the continuum subtraction
RGB/K: Halpha-Q*(Red-med(Red))
Integrating continuum subtraction into RGB
R: Red+Q*(HaCS-med(HaCS))
G: Green
B: Blue+Q*(HaCS-med(HaCS))*.2
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Streamlining Image Stretching with the DeLinear Script in PixInsight
This tutorial by Masters of PixInsight Co-Founder Warren Keller introduces the DeLinear script by Hartmut Bornemann, designed to simplify the process of converting linear images to a non-linear state in PixInsight. This script offers an efficient alternative to manual histogram transformation. Key points include:
Setting Up the Screen Transfer Function (STF):
- Learn how to prepare a well-balanced temporary stretch using the STF to guide the DeLinear script for optimal results.
Executing the DeLinear Script:
- With a single click, DeLinear applies a permanent histogram transformation based on your STF settings, eliminating the need for additional steps.
Fine-Tuning After DeLinearization:
- Warren explains how to check and adjust the black point and mid-tones using histogram transformation if necessary, ensuring that the shadows, mid-tones, and highlights are balanced.
This tutorial provides a practical guide to using DeLinear for a quicker, more streamlined image stretching process in PixInsight.
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Creating Precision Masks with the FAME Script in PixInsight
In this tutorial, Warren Keller, Telescope Live Tutor and Co-Founder of Masters of PixInsight, introduces the FAME (Flexible Area Mask Editor) script by Frank Marek, a versatile tool for creating masks in PixInsight. Warren compares FAME to other popular scripts and emphasizes its Photoshop-like ease of use. Key features discussed include:
Intuitive Mask Creation:
- Use freehand and elliptical selection tools, similar to Photoshop’s Lasso tool, to quickly draw and modify masks. Adjust and rotate selections with ease.
Mask Types and Options:
- Generate binary masks for precise edits or lightness masks for natural image gradation. Warren also explores feathering settings to soften mask edges.
Practical Applications:
- Apply masks to target specific areas of your image, enhancing or protecting details as needed. Warren shares tips for achieving optimal results using PixInsight’s convolution tool for extra feathering.
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Mastering Generalized Hyperbolic Stretch in PixInsight
In this tutorial, Ryan Voykin from Dark Rangers Inc. explains the Generalized Hyperbolic Stretch (GHS) process in PixInsight, showcasing its powerful ability to bring out faint details and control bright areas in astrophotography images. Key steps include:
Setting Up for GHS:
- Learn Ryan’s preferred method for using GHS, focusing on gradual adjustments to highlight faint details without over-brightening.
Controlling Dynamic Range:
- Discover techniques to balance shadows and highlights by targeting darker areas first, progressively moving to midtones and bright areas for optimal contrast.
Adjusting Final Colors and Stars:
- Enhance colors by manipulating individual channels and using SCNR to remove magenta from stars, providing a cleaner look to the final image.