Color of Saturated Stars.

Roger Smith

Hi Adam,

It is well know from your videos that saturated stars have lost their color information. You target to keep those objects, ie galaxies and stars below approximately .85.

Attached are the profiles of a star in the background of M106 (not in the galaxy). It is clearly saturated in the raw image, and the top is flat.

In PI 1.8.9 using WBPP 2.4.0 I processed my color image into separate RGB channels.

I find that after calibration, debayer, NSG, and integration, the profile is much more rounded, and the peak value is below .85.

When I run DBE on one channel, the base ADU level is driven down to just above zero, and the peak goes up to .99

My question is if I put the RGB integrated channels image back together and then run PCC without DBE, can I reclaim the correct colors to the stars? 

If yes, then where would DBE fit in as it drives the star back up to full saturation?

Does PI have any star profile tools that can show plots of star profiles?

Thanks for your help,

    Roger