In this tutorial, Telescope Live Co-Founder Alexander Curry, demonstrates how to enhance RGB images by integrating Hydrogen Alpha (Hα) data using 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

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.