I have one column defect in my PL16803 camera. It is annoying and dithering can get rid of it.
If you have ImagesPlus this is for you
http://www.mlunsold.com/process/IP4/...ColumnFix.html
It works like a charm in batch mode. It can do more than one column defect.
I will not bother putting up before and after as I cannot be bothered.
Bert