I have always had the 'Webcam Blues' when it comes to capturing stars. When they are very bright, they get black rings around them known as artifacts causing what is also known as 'Blooming' or 'Webcam Blackeye'.
Ving posted a link in here about 2 days ago of a French site offering a Free program to deal with this problem.
Well, the good news is, it works!
Thanks to Vingo for posting the link.
The program is called Loreal V0.0.7 and can only be found here:
http://www.astrosurf.com/hfosaf/uk/tdownload.htm#loreal
I have translated the Instructions into English.
To really test the program out, I chose my worst Blackeye pic (the Trapezium) and ran it through, and was suprised at the ease at which it works.
After correcting the artifacts in Loreal, I then ran through PaintShop pro with the usual Sharpen etc.
This program has enabled me to go back and repair all my old pics
Here are the results:
Pic 1: Before and after 'Loreal'
Pic 2: after the final work in PaintShop Pro.