Wavelet preview

[Riccardo A. Ballerini]

Hi!
if I set the parameters in order to create a "star mask" the preview works correctly.
When I apply the parameters to the image I get a black image.
Here is a self explanatory small movie
http://www.riccardoballerini.com/riccardorballerini/temporary.html

Am I doing something wrong?

Thank you
riccardo

[Juan Conejero]

Hi Riccardo,

No, you aren't doing anything wrong. The problem here is that currently the ATWT tool has limited real-time previewing capabilities. It works quite well when the difference in size between the image and the real-time preview is not too large (say no more than 1:2 approx.), but with larger differences the real-time preview results may be way inaccurate.

In your case the image has about 4000x2500 pixels. The r-t preview is much smaller; probably 8 times smaller than the image. In this case, you have two options:

- Use previews instead of the real-time preview.

- Use a downsampled version of your image to build the mask (say a version reduced to 1/4 of the original with IntegerResample); then upsample the mask inversely to the original size. The r-t preview will work much better with a reduced version.

I'll try to improve ATWT's real-time previewing accuracy in future versions; sorry for the inconvenience.

Thanks for the movie by the way

[Riccardo A. Ballerini]

Thank you for replying!


...but ...I have similar behaviour with "non" real time preview as well though :-(

i.e.
Trying to recover (just for fun) a bad image that suffers of bad collimation and tracking I:
create a preview - adjust parameters for Mot. Blur. Deconv. - obtaining
pic A
When I apply the settings to the whole image I obtain a very different result
pic B

Do I have to assume that is a size mismatch related idiosyncrasy similar to the real time preview?


Thank you!
Riccardo