Some of the significant differences in the program execution times may relate to how the various steps are carried. For instance, APP say that ‘it uses very high precision star location using Intensity Weighted Centroiding’. The program obviously has to locate the brighter stars in each frame and some of the programs may do this more accurately than others. So the same set of 45 raw files of the Sword of Orion region was processed seven times with DSS processing both raw and Tiff files. Neither DSS nor Sequator state what debayering method is used so I have also included a test with DSS where Raw Therapee has first been used to convert the raw files into Tiff files. Interested in comparing its results with those obtained by the other software Sharpness and will make stars rounder when compared to the well-known AHD and Method developed by its author called ‘Adaptive Airy Disk’ that it is stated ‘will reduce green/magenta cast in your RGB data, will improve The VNG (Variable Number of Gradiants) method used by Siril. Two of the better are said the be the ‘AMAZE’ method used by the Raw Therapee raw conversion program and Method to some quite sophisticated methods. Of deBayering methods ranging for the very fast, but crude, ‘nearest neighbour’ This is usually the first step and there are quite a number It includes two free programs, Siril and Images Plus, a third, either ‘rented or purchased’ program, Astro Pixel Processor and the updated version of Affinity Photo. Here is a further look at the topic comparing the results of stacking the same data with 6 programs. There are two further articles on this topic in the digest: the first is a discussion of the program Sequator and Deep Sky Stacker and the second as to whether it might be worth first converting raw files into Tiff files before using them within an alignment and stacking program.
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