Search found 2 matches

by EHEA
10 Jun 2020, 23:33
Forum: Image processing and analysis
Topic: Precision loss during stacking when input is in integer FITS format
Replies: 2
Views: 1943

Re: Precision loss during stacking when input is in integer FITS format

Hi Fabio. Thanks for the swift reply. If the external software accepts 32bit floating point, why to average at all? Just send him the result of the Sum. This will permit an easier calculation of the S/N of stars, since the number of images is variable. That's true, but again, even when doing a sum o...
by EHEA
10 Jun 2020, 17:08
Forum: Image processing and analysis
Topic: Precision loss during stacking when input is in integer FITS format
Replies: 2
Views: 1943

Precision loss during stacking when input is in integer FITS format

Hi all, The task I want to perform in AstroArt7 is the following: I want to stack many (sometimes a lot) of FITS images, and then do photometry on them with an external software. The input : - Out of the camera: 16 bit integer FITS , light and dark frames - A single master flat frame, 32 bit floatin...