need help with TGVDenoise local support for linear images

[herman]

I can't figure out how to setup the local support option for TGVDenoise for a linear image.  Is there a standard procedure that can be followed for this?  I think Juan's advice on the Gamma Cygni example in the release forum said to use values from the STF but I'm not sure exactly what maps to what.  Any help would be appreciated.

[dgbarar]

Hi Herman,

I think I can help you with this.  Open the STF module.  Assume for the moment that you screen stretched the image with the default settings.  Next select STF parameters.  That is the icon on the STF pop-up that looks like a crescent wrench.  The results in the pop-up correspond to black-point, mid-tones, and white point. These are what are input into the local support mid-tones, shadows, and highlights (I wish they would change the order in TGV Denoise so they correspond to what is in Screen Stretch).

You can confirm this is correct by removing the screen stretch then going back to TGV Denoise, select preview and then executing.  The result will look the same as the screen stretched previously performed.

Hope this helped.

Don

[niteman1946]

Thanks Herman for asking the question.

Thanks Don for the answer.

I've started using the TGVDenoise, but only in non-linear.  Had no luck in the linear mode.  Don's recommendation for local support worked very well.  I reduced the default "strength", "edge protection" and "smoothness" by one order of magnitude and got very good results with Don's local support input on my Ha version of M57.  It is now better than the Multiscale Median Transform in the linear condition  ---  so far.

It's a pity there is not a handy way to transfer the info from STF parameters easier, and that the nomenclature is not more consistant.

But, good stuff.

Mark

[Carlos Milovic]

Hi all
We'll include in our to-do list to import STF instances to set the local support, just as HistogramTransform understands STF instances to set its parameters.

[jerryyyyy]

Hi all
We'll include in our to-do list to import STF instances to set the local support, just as HistogramTransform understands STF instances to set its parameters.

Would be wonderful if you could do this.  The de-noising is great, when you can get the right parameters....

[IanL]

Hi all
We'll include in our to-do list to import STF instances to set the local support, just as HistogramTransform understands STF instances to set its parameters.

Just re-ordering the input boxes so they are consistent on all three tools would make life easier and probably be the work of moments.  Have to agreed that TGVDenoise is a great tool!

[jkmorse]

Don,

Thanks loads for your answer to how to use the local support for linear images.  I was really struggling with how to set the tool up.

Regards,

Jim

[Roger B]

Hi all,

Sorry to bring this up but I'm also struggling with the TGV Denoise.   I have opened my two images  Ha & SII,  selected the STF and opened the parameters for the Ha image.  Now I'm faced with 12 boxes with numbers inside.    The boxes area labelled R/K, G,B,L  for what I under stand is Red, Green, Blue, Luminance.   so what one of the boxes represent the midtones, shadows, & highlights ?   

Roger     

[pfile]

if you hover your mouse over the text boxes it should give a tooltip showing what each number means...

since these are mono images you want to use the R/K value.

rob

[Carlos Milovic]

Or, export the settings to the histogramtransformation process. It is much easier to read the values there.