Author Topic: TGV Denoise acts *only* on part of the image  (Read 311 times)

Offline Ajay Narayanan

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TGV Denoise acts *only* on part of the image
« on: 2019 June 03 18:23:29 »
Hi,

After the update to version 1.08.06.1475,  I am seeing some strange behaviour from TGV when applied to a linear monochrome image. I am running this on a Linuxmint 19.1.

The denoising appears to be applied to only part of the image. My original image is 3328x2495, but the denoised region is only 3328x1870 approximately. Please see attached image

At first I thought this might be a refresh issue. So I reset STF and reapplied it. Still there. I saved the image and opened it. Still there. I saved the project and reopened it, still there. Undoing and reapplying also does not seem to have an effect. So it seems that the effect is real. It only seems to be acting on part of the image. I have played with the parameters I used to no avail.

See second attachment for TGV settings. In addition to this, I also had a grey 50% mask applied.

Ajay


Offline Juan Conejero

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Re: TGV Denoise acts *only* on part of the image
« Reply #1 on: 2019 June 03 23:12:34 »
Hi Ajay,

Bug confirmed. This looks like a thread synchronization issue in the TGVDenoise process. I hope to have this problem fixed tomorrow with a regular update (I am travelling today). Thank you for reporting.

In the meanwhile, here is a workaround:

- Run the following command in Process Console to disable parallel processing:

      parallel --disable

- Apply TGVDenoise to your image.

- Run this command to re-enable parallel processing:

      parallel --enable


It will run slow but won't cause this problem. Sorry for the inconvenience.
Juan Conejero
PixInsight Development Team
http://pixinsight.com/

Offline Ajay Narayanan

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Re: TGV Denoise acts *only* on part of the image
« Reply #2 on: 2019 June 04 17:12:01 »
Hi Juan,

Thank you for the prompt response. Looking forward to the update. Meanwhile I will try the disable, enable parallel if I can get back to processing.

Ajay

p.s. I can confirm that disabling parallel fixed the issue. The entire image is now denoised. Thanks!
« Last Edit: 2019 June 04 17:32:48 by Ajay Narayanan »

Offline Ajay Narayanan

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Re: TGV Denoise acts *only* on part of the image
« Reply #3 on: 2019 June 19 12:04:58 »
Hi Juan,

Any progress on the updates?

Ajay