Author Topic: MMT vs MLT at linear state, OSC  (Read 2839 times)

Offline Yarosia

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MMT vs MLT at linear state, OSC
« on: 2015 August 17 01:15:03 »
Hi!
I always skipped linear state noise reduction because of blotchy result of my applications of ATWT (i think i often pushed it).
A friend of mine, told about using MLT for linear state noise reduction, and it worked better than ATWT. I once tried MMT, and playing with the adaptive slider (smaller values at small scale - 0.1 - , bigger values - 0.5 -  at 5th wavelet) in conjunction with the luminosity mask i used also with atwt and mlt, completely destroyed the blotchy degraded background, and provided the image i always wanted.
I would like to know:
what am i missing here?
I often found tutorials or processing examples in general using atwt or mlt at linear, while mmt at non linear stage...
is it wrong to use mmt at linear? am i destroyng signal?

Thanks in advance!
Michele

Offline Carlos Milovic

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Re: MMT vs MLT at linear state, OSC
« Reply #1 on: 2015 August 17 14:31:14 »
I don't think so. MMT is based on median transform, so, for small scale noise, it should work quite good, while preserving all the relevant structures/edges. Just don't overdo. Inspect your image with different STF settings and see if there is an undesirable artifact or after-effect.
Regards,

Carlos Milovic F.
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PixInsight Project Developer
http://www.pixinsight.com

Offline Yarosia

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Re: MMT vs MLT at linear state, OSC
« Reply #2 on: 2015 August 17 23:44:10 »
Thank you very much... i usually push as far as 0.25 amount, with luminosity mask. The adaptive slider seems to do the magic with my images...