Soft Image

[Harry page]

Hi All

I took this image of the Pacman and some people have commented that it is a bit soft, I used pixinsight
to do all the processing but not any wavelets or decon as I could not seem to get them to work ( yes I know
its the user)

Anybody got any tips / ideas/ help

Regards Harry Page


http://tinyurl.com/6bmsn3

Taken with

1) sxvf m25
2) 14" newt
3) 370 miles exp in 5 min subs

[Juan Conejero]

Hi Harry,

Deconvolution doesn't seem a good choice for this image. I may be wrong, but I don't think you have enough signal to deconvolve here.

The ATrousWaveletTransform tool seems much more appropriate. However, to apply this tool you must be very careful to avoid noise intensification and ringing artifacts. I strongly recommend you to apply wavelets when the image is still linear, which basically implies reprocessing from scratch.

This tutorial shows you many important things about ATrousWaveletTransform:

http://pixinsight.com/examples/wavelets/NGC7000/en.html

You can go directly to Step 3: Detail Enhancement with Wavelets. Note that while I used the StarMask tool to generate a star mask for this image, a much simpler and also powerful mask generation strategy can be implemented with wavelets. For example, this tutorial by Carlos Sonnenstein:

http://pixinsight.com/tmp/m45/en_tutorial_m45.htm

shows you a very effective technique to build star masks. Skip to the section about "Morphological Transformations", more or less at the middle of the document, and you'll find it described there. I still have to edit this tutorial and include it in the website's official tutorials section (sorry Carlos! ) )...

Hope this helps.

[Harry page]

Hi Juan

Have had a go as you suggest, have had awfull results!
Will try other settings and see what happens and perhapes time for one of your demo!


thanks for the pointers


Harry

[Nocturnal]

I'll be reading this thread with interest as I've had very limited success with wavelets and deconv. Either they do nothing or they trash the picture in my incapable hands. So far my best results come from histogram and curve transforms along with SCNR and ACDNR. I'd love to add more advanced techniques to my arsenal but I can never replicate the results in the tutorials With so many countless permutations of all the parameters it's hard to figure out what to do.

[Harry page]

Hi Sander

I bet your trys are not as bad as mine!
I mean mine are really really bad, but will keep trying


Harry