We have an old workstation with Diamant (I think it's version 1.8 or something similar). The 'Automatic' mode is worst than what you could obtain with Avisynth. Don't know about CTC or Correct DRS but Diamant works with image files so this would need a YUY2->RGB->YUY2 colorspace conversion. Noise reduction is better with Avisynth and MVTools2 (remove more grain and destroy less details). The only strong point left is the manual mode of Diamant, useful, for example, with white/black spots or vertical scratch where you select (with the mouse) the points that you want to process (excluding the rest of the image). Obviously this end with better results (with this kind of problems) but is very time-consuming (not only for the pc but also for the worker). I've heard good things about Snell and Wilcox Archangel Ph.C but I think it's an hardware-based solution (also very expansive).

Etain 27.04.16 23:58 comment3, Skachat sbornik.

The Phoenix suite of products offers world class restoration tools for the most. A cost effective image restoration software, aimed at film based material and for. I understand that I will receive the Windows Apps by Download newsletter and the Download Insider. I am aware I can opt out at any time. Alternative Software.

I don't know the typical license cost but they told me that it's not so cheap. Regarding the hardware, you can build your own. The software uses a 'master' workstation (a pc with the software installed) and other 'satellite' workstation that are used for distribuited work (we have 3 satellite + 1 master).

The workstation is quite old (WinXP SP1 32bit, dual P4). Like I said, it works on images and work best in group of pictures of about 5000 frames, so first you need to split your film in blocks of 5000 images per folder. Then you can start to restore the images. The processing is quite slow (a full film require about 3-4 days of raw calculation).

Keep in mind that I'm speaking of version 1.x. Since now the 3.x version is out, it could be that some limitation (5000 frames) and/or time required for restoration could be improved (due to new CPU on the market and optimization of the software). I don't have a feedback of version 3.x so I couldn't tell you if version 3.x works better than Avisynth. Surely current Avisynth filters works best than version 1.x.