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Photoshop Narrowband Color Enhancement
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Photoshop Narrowband Color Enhancement
In this Photoshop tutorial, Telescope Live Tutor Bernard Miller demonstrates techniques to enhance color in narrowband astrophotography images, specifically focusing on both object and star colors. Using an image of the Elephant Trunk Nebula, Bernard will explain the SHO palette (Sulfur mapped to red, Hydrogen to green, and Oxygen to blue) and addresses the common issue of green tints and unnatural magenta stars. Bernard will show you a process involving selective color adjustments to reduce green and enhance overall color balance. He will further explain using RC Astro’s Star Exterminator to remove stars, improving image editing without star interference. Lastly, he will show you how to restore and enhance star colors, making them more natural without the need for RGB data.
Mastering Monochrome Post-Processing in Affinity Photo V2
In this tutorial, James Ritson offers a comprehensive guide to monochrome astrophotography using Affinity Photo V2. James will show you how to stack narrowband data, focusing on H-alpha, sulfur-2, and oxygen-3 images, with adaptability for broadband RGB mono data. He begins by demonstrating how to add light and calibration frames and utilize the File Groups feature for organized processing. James teaches you how to blend and color map data using the classic Hubble Palette and balance the intensity of emission layers with the Linear Fit tool. Additionally, he provides techniques for enhancing images with selective color adjustments, noise reduction, and a final crop for composition.
Intricate Stretching and Contrasting using SIRIL
Looking for detailed guidance on achieving well-defined, high-contrast astronomical images?
In this intermediate SIRIL tutorial, Telescope Live Co-Founder Alexander Curry delves into the Generalized Hyperbolic Stretch (GHS) transformation and the Contrast Limited Adaptive Histogram Equalization (CLAH) tool. Using the monochrome Rosette Nebula as an example, Alex demonstrates how to manipulate the GHS for optimal data stretching and contrast enhancement. The tutorial walks through setting symmetry points, adjusting stretch factors, and using the CLAH to fine-tune image clarity and sharpness.