Multi-mask Stretching

摘要

This edition continues a group of Imager's Corner articles that will focus on a few techniques that are useful in processing astrophotos. Over the next several editions of the Journal, I'll continue with a guide to the techniques that I find most useful. In my last column, we looked at a way of generating starless masks that can be used for masked stretching. In this edition, I'll show a way of using multi-masked stretching to bring out the faint stuff. I'll show the process in ImagesPlus using split-star processing, but it can be done in any layer-capable image processor with a little more star bloat.