This masterclass series with Warren Keller provides a comprehensive deep dive into image stretching and delinearisation in PixInsight. Across the series, Warren explains the theory behind linear data, histograms, and tonal mapping, before systematically exploring both established and cutting-edge stretching tools.
Through practical demonstrations and side-by-side comparisons—including Histogram Transformation, Statistical Stretch, Verilux, Multi-Scale Adaptive Stretch, and ArcSinH—he shows how different approaches influence contrast, colour saturation, star control, and nebulosity development.
The series emphasises technical understanding, workflow discipline, and experimentation, equipping astrophotographers with the knowledge to select and apply the right stretching method for consistently refined, high-quality results