MultiscaleLinearTransform Pixinsight

[alcol620]

Can someone point me in the direction of using the Linear Mask in Pixinsight's MLT tool?

 

Many thanks

[gnomus]

This chap has put together a really useful set of tutorials for PixInsight - http://www.lightvortexastronomy.com/tutorials.html Do also search for Harry's Videos http://harrysastroshed.com/pixinsight/pixinsight video html/Pixinsighthome.html

[alcol620]

Thanks Gnomus

 

Had a look through these sites, but neither addresses the specific issue of using the Linear Mask within the MLT noise reduction tool. I think this a a relatively new feature.

 

Thanks

 

Alec

[alcol620]

Got the answer from Edoardo on the Pixinsight Forum and it works wonderfully. It is as follows:

You must use it for denoising at linear stage: activate the mask checking the "Linear Mask" checkbox.
Create a Preview on your image to test the masking and denoising parameters.
Deactivate the Screen Transfert Function and Check the "Preview Mask" flag.

Set the "Amplification" factor: this is a multiplicative factor applied to the image that enhance it to create a protective mask.
Typical values range from 60 to 110.
Drag and drop the blue triangle of MMT process on your preview: you will preview the mask that will be applied.
Trim the amplification factor and the smoothness factor to get the desired masking effect.

When done Deactivate the "Preview Mask" flag, reactivate the Screen Transfer function and proceed as usual with denoise.

The denosing effect will be applied with the built in masking.