As others mentioned and my experience, Gigapixel will often remove Jpeg artifacts and if it doesn’t then use Denoise AI which will do it too.
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I need some help… I am unable to uninstall the previous version of Gigapixel and I cannot install the new version.
I have gigapixel on desktop and laptop. On the desktop I was able to install the latest version and uninstall the old version with no issues. On my laptop, I can’t uninstall through windows programs and features, nor will it uninstall when using the installer for the new version. Both of them get stuck on the uninstall at 58% and won’t do anything more. So I can’t install the new version as it won’t do that without uninstall the old version which it won’t do.
So what do I do now?
PC or Mac?
Hi, thanks but unless Apple has a Windows Programs and Features app for uninstalling then let’s go with Windows (PC)
Oops, read it too fast! Which version of Windows?
Windows 10 Pro v1909
Are there any differences between the desktop and laptop:-
Version of OS
Bespoke installation folder(s)
UAC differences
Subject to above? There was a time when I saw it suggested and used it once or twice that running a ‘sticking’ un/installer in safe mode overcame the issue…but I think this was mostly back in the W2K and W7 days???
Are you using a Admistrator user for the uninstall?
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I had removed the existing installation and done a clean installation. The application crashes upon Face Refinement : ON. I tried multiple times.
yes I am using an Administrator account
In overall, nice speed improvements over 4.4.6! Auto option works at last, but sometimes, when preview doesn’t refresh itself under selected Auto setting, I need to move the picture around to force this 
I still see severe banding in GPU mode (RTX 2080 card, Windows 7), which in CPU mode doesn’t appear:
This very image for testing
I also see Auto option setting the Suppress Noise at 20 and Remove Blur at 80 quite often, on small images (192x192 thumbs for example), when returning from bigger scaling to smaller (from 4x to 2x for example), when at the first preview (after dropping the image) the Auto setting suggested 2x and 3x respectively.
Correction: this 20|80 setting comes from PREVIOUS image in queue, which has got Auto set at those values, and it seems, those values are being “transferred” for another image, when Auto is selected.
OK next thing you can try is to go to the application directories on both the Program and
folders and ProgramData folders and delete any folder in Topaz Labs or Topaz Labs LLC that contains the word GigaPixel.
Then go to the Local AppData folder, type %LocalAppData% in the Explorer search bar and press enter, then delete any folder in Topaz Labs or Topaz Labs LLC that contains the word GigaPixel.
After that type Regedt32 in the Taskbar search, press enter and delete any entries in either HKEY_CURRENT_USER\Software\Topaz Labs or HKEY_LOCAL_MACHINE\SOFTWARE\Topaz Labs LLC and then delete any entry that contains the word GigaPixel.
Then you can open the Control Panel, again from the search in the Taskbar, then go to Control Panel\Programs\Programs and Features and attempt to uninstall any GigaPixel program. It should ask you to delete the entry because they are no longer there.
Then, using a Administrator account, install GigaPixel.
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I have a question about this update. For someone using the previous versions and not interested in any of the UI changes, are there any points to upgrade?
Are the AI models updated with each new release? That’s really my question.
thanks for your answer, I have just solved it by a different method. I finally found a link to the previous versions of Gigapixel and I was then able to install the previous version again, and once that had installed I was then able to uninstall it successfully.
Once that uninstall completed I was then able to install the new version, and it ran to completion and the install is working.
thanks for your help
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- loading multiple images instantly now
- preview is not that small anymore
- new version feels faster encoding
Yes there are new models. At first it seems better than the previous one but it tends to add some chroma noise on some images no matter the denoise settings applied compared to the old version.
I had a closer look into the new version and it has the same issue with larger images than the old version. In the preview window it looks between good and great dependend on how you move the part of the image view around but in the final saved result the details shown in the preview before are gone and the image in the same location looks blurry.
is there any work around? or share me the link for last stable version
You can try to split the image into smaller pieces not larger than 500 x 500 pixels, then batch process them with Gigapixel and merge them together again after.
