David Ault did a session on the Astro Imaging Channel on Manual Image Integration. It covers everything from calibration to final integration. He explains nearly everything you need to know and has provided process icons and the data to walk you through it. A great resource!
Manual Image Integration
https://youtu.be/nakOHL02XFoSome of his previous videos...
Advanced Pixel Math Operations
https://youtu.be/odjGnqefwHcMaking Pretty Pictures from Scientific Data
https://youtu.be/hjauMEU9CcQ
