PPMcenter or PCFE- Sunspot settings required

[[1ponders] (Paul)]

This ones for the gurus. I'm trying to use PCFE to process some sunspot bmps. Unfortunately it doesn't seem to like doing it. I tried with the standard settings, but not go. I then mucked around with the threashold setting...still nothing. I then forced the process and away it went. Unfortunately it didn't so a very good job of centering the sunspot it was jumping all over the place.

Can anyone offer any suggestions? I've attached a single frame so you can see what I'm working with.

Thanks

[iceman (Mike)]

It won't work.. ppmcentre expects the background to be space, and have some object in the middle.

You've got the "sun" as the background, and a darker spot in the middle. The threshhold setting is for a noisy background, so you can raise it to a level above the noise, but you've got bright sun as the background.

I'd give up, sorry Paul.

[[1ponders] (Paul)]

Bummer. Thanks Mike.