Quote:
Originally Posted by Octane
Isn't this the same as "drizzling" or am I on the wrong planet?
H
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Yes it is mathematically. It is a better practical method as it also corrects for the defects in one shot colour sensors that are not cooled to -40C as CCD's are due to their poor performance anywhere near room temperature.
There is really nothing new it is just a method that does it all better.
Some people advocate subpixel dithering. By this the always present drift is sufficient. For reasons already stated it is better to dither by many pixels.
I should note again I correct for flats and darks with data in fits files. I then also stretch in the fits files. It is only then I interpolate to the TIFF files. This gets data that is far less corrupted or riddled with artefacts..
Bert