Images taken with my ASI294M PRO Cool in SGP open as grayscale and can't be converted to color in PI. In the FITS header I can't find any info related. The top line says SIMPLE T file does not conform to FITS standard. What may be happening?
Deyer pattern is RGGB.
In Pixinsight there is a debyer function ,choose RGGB pattern will get color imges. Oh, still need to background netrulization.
