Processing question

When I adjust the wavelets in Registax on webcam images to the desired level of sharpness I sometimes get a series of "rings" just inside of the limb as in the attached image (about 1100 frames stacked.) Is there a secret to processing these out? What causes them? Could it be that registax picks some frames where the seeing was terrible with a bloated limb and thus stacking it on good frames? My settings are: brightness 100%, gain 30%, gamma 0%, 10fps @ 1/25th sec. So far I have been doing all processing in Registax. Maybe its time to take the plunge and get Photoshop. thanks for any advice.

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We have found that "ringing" is caused when the gain is set too low. Your ringing looks about normal for a gain of 30% to me, but try increasing gain to about 50% and see what happens. I set my brightness to about 150-170 on the K3CCD intensity scale, but you can experiment here too. The image looks quite nice to me but a program like Photoshop or my choice, Paint Shop Pro 8.1, would be a help too. In fact, here is how your image turned out when I ran my specialized "Planetary Macro" in Paint Shop Pro. Hope you like it.

Enjoy!!
Paul Maxson

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Vince, This effect can sometimes be minimized by laying in a number of points on the Gamma curve in the Imaging Processing window and making small +/- adjustments, especially at the lower/left area of the curve. You also might play with the Wavelet filter by tweaking the unsharp mask seed incrementally around the outer edge (+/- 1)

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Hi Vincent,

Thats a fine Jupiter image! Personally though I've never had much success using Registax's wavelets for processing planets, I tend to get exaggerated artifacts like the ringing. I'd try whats already been suggested to you ie turn up the gain a bit turn down the brightness and maybe add 10% gamma, although the night you shot that might have been lousy transparency so those settings could have been just fine in normal to good transparency. Software wise try out a trail version of Images Plus, I use their "wavelets" version which is the multires smooth/sharpen option, works great for planets, its a lot cheaper than phtoshop plus it has superb customer support.
hers a link: http://www.mlunsold.com/

best regards

Mike Wirths