[Mr Ron Palgrave]

Thanks, you have mentioned the subjects that I have used the technique on. I have not applied it to anything else [yet]. Glad to see it is an acceptable step.

[Mr Ron Palgrave]

Thanks David, that looks interesting. But  I cannot [yet] see how I can force Autostakkert , against its will, to take an imposed image as the reference frame. That does not seem an option. Would I need to merge it into the PIPP stack first?

[Mr Ron Palgrave]

I took profiles across each image. The in-chopped image went smoothly to a small positive value whereas the chopped went to zero. No negatives, But then I noticed you stipulated the unsharpened image! I will have to do it again.

[Mr Ron Palgrave]

Thank you Robin. You understand my point that the chopping process might be detracting from the usefulness of the image, even though it might look “nicer”. Both images are sharpened. As you suggest, I will check the profile. To be frank, I have no illusions as to my competence at present. But that will come and I do not want my captures to be inherently flawed. Thanks for your help.

[Mr Ron Palgrave]

Thanks for your comment Grant. I have quickly tried the sequence you suggest, that is chopping AFTER wavelet sharpening. My first impression is that it produces a more useful image. I will pursue this a little further. 

[Mr Ron Palgrave]

Thanks for your response. I attach a comparison for you .You can see that the limb darkening appears to improve. I am nervous that I am tampering with the image too much, but you can understand the temptation.

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