A fantastic collection of various deep space objects, imaged in HaLRGB by Jim Misti. Working with just the L (luminance) frames, before delving into HaLRGB combining, is great way to learn the ropes.
Results are free to publish, as long as they are credited "Image acquisition by Jim Misti".
Thank you StarTools for turning my average photos into amazing ones.
One online tool for BASE64 is Motobit Software's BASE64 encoder/decoder.
Current image processing routines and filters are still as 'dumb' as they were in the early 90s.
In your final image, noise is worse in some areas, less in others.
Upon opening an image, the Tracking dialog will open, asking you about the characteristics of the data.
You can convert everything you see to a format you find convenient. Give it a try!