Multiscale Median Transform - help

[catalinfus]

Hi,

I'm trying for some hours to figure out what is happening with MMT, with no success!! I have an image - TIFF format - of the TSE from some days ago.
The original image is this one :



preview result image is this one :



applied MMT image is this one :



i do not have a clue why the preview result looks so good and when applied, looks like almost nothing happens.

I'm using PI for 5 years+ now and this is the first time I see something like this. Anybody encountered the same issue? Might this be a bug (tiff file problem)?

Will try to save it differently and check the outcome.....but nonetheless there is something little wrong in this.

Thank You
Catalin

[catalinfus]

ATrous Wavelet transform, same issue. TIFF, FIT, whatever.

Thanks in advance!
Catalin

[georg.viehoever]

There have been a couple of posts about this already. The wavelet based processes cannot produce an exact preview due to the way they work. Consider this only an attempt at an approximation.
Georg

[Alejandro Tombolini]

Hi Catalin,

You can generate a new preview of the image and adjust the MMT setting on it.

Use real time preview only as a general aproximation an to understand how the parameters affect the images.

BTW, nice picture!.

Regards,
Alejandro.

[catalinfus]

Thanks for answering and Georg, sincerely, I posted here and then in bugs because I really do not know how to treat this. I'm not a casual user of the forums as I can handle my way through Pixinsight pretty easy.
This was the first time I've seen such things happening and I really do not understand why.

I've processed a lot of images, deep-sky, moon, sun...and all the time, the preview window showed the correct output.

Also the HDRMT is not doing the job as in previous versions. I have pretty unexpected results with a lot of noise (just like ATWT and MMT) that simply doesn't make sense....

I mean, I have noise reduction in first/second layer (ATWT or MMT) , on preview pane shows that it works, I apply the instance and the image resulted looks totally opposite, grainy, noisy and missing all detail that has been shown in preview pane...

Thanks Alejandro!! I have some more nice pictures like this and I found out today I can not process them. Photoshop processing is not on my liking.....

Regards,
Cata

[bitli]

Hi Catalin,
A few processes do not always provide fast and useable real-time preview.
You may want to have a look at the script VaryParams (http://pixinsight.com/forum/index.php?topic=4108.msg28562#msg28562). It may help generating images with a few values of the parameters, either to look at the effect of the parameter, or to fine tune the value once you find the approximate one.
This is not a panacea but helped me a few times - warning: I am the author of the script :-)

-- bitli

[catalinfus]

Hello Bitli,

thank you very much for your idea and for the script link!!

To tell you frankly, after seeing how this tools are working now, I'm a little bit disappointed but, maybe I'll have the time to learn it someday...

Thank You again to all of you who have responded!!

All the best,
Catalin

[Alejandro Tombolini]

Hi Catalin,
I was looking at your page and your images of the eclipse are very nice! Congratulations!
Saludos,
Alejandro.

[catalinfus]

Thanks Alejandro! I'm glad you like them.

Regards
Catalin