|
Hi Dennis. I am sorry I cannot shed light on the cause but I can give you a method to remove these holes. It does appear to be some spots on some surface of the imaging train or in a calibration file.
Using CCDStack:
1. Select "Process", "Data Reget"
2. Select "Free Hand Draw" set pixel width to 1 pixel.
3. Mark all holes with a mouse click over them. Click apply.
4. Select "Grow" from reject menu. Set width to 5 pixels and apply.
5. From reject menu, select set pixel value to missing pixel and apply.
6. From reject menu select "Interpolate missing pixels" set value to 3 and iterations to 5. and apply.
This proceedure should remove these holes and fill them with an interpolated value based on the surrounding values.
I added an image repaired with a couple on the right side not repaired.
Sorry about the quality but it is a bit hard with a JPG.
I hope this helps.
|