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DrDre

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Join date
16-Mar-2015
Last activity
29-Jun-2022
Posts
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Post
#758533
Topic
Star Wars GOUT in HD using super resolution algorithm (* unfinished project *)
Time

Although I understand most of your points, I have to disagree with the idea that smart upscaling super resolution does not work. As a scientist I like to stick to the scientific evidence, and the developers of this super resolution algorithm have pretty convincing numbers on their site that prove that their algorithm is superior to many other methods described in scientific literature:

http://www.infognition.com/articles/video_resize_shootout.html

While I agree that the Despecialized Edition of Star Wars is amazing, especially v2.5, the quality difference in some of the elements in TESB and ROTJ is quite noticable. I'm sure Harmy is working on bringing those up to the quality of SW, but these despecialized films are many years in the making. By the time he is finished we may actually have seen the official bluray release of the originals. In the mean time I'm simply interested in what these super resolution algorithms can do. They keep getting better, and better so who knows we may be able to squeeze some more details from the GOUT.

I'm aware of the great work done by others to improve the GOUT in many ways, but personally, although I'm no fan of film grain, I prefer the grain over less detail. So out of personal interest I will continue to check out these algorithms, and anyone who's interested can follow my progress...  

Post
#758344
Topic
Star Wars GOUT in HD using super resolution algorithm (* unfinished project *)
Time

The solution is to remove the black bars in the frames. The black bars introduce a ghosting effect under some conditions, resulting in vague horizontal lines. 

I now use the following procedure:

I start from the PAL versions of the GOUT.

1) Convert the dvd to a high quality mkv (8000kbps) without the black bars, resulting in a 720x326 video. I use Handbrake for the conversion.

2) Apply the super resolution algorithm in Infognition, and upscale to 2160x1296, with the actual video size 2160x815. This will also reintroduce the black bars (this does not affect the super resolution). The output is raw video (avi), so the file is very large (600GB). You can also use compression codecs you can download via the Infognition site. However, I prefer to post-process the upscaled video in Handbrake.

3) Convert the raw video to a mkv file with the proper size (1920x1080, 80000kbps) using Handbrake, resulting in a 20GB per movie HD GOUT. 

In all the steps I copy the original audio, so it's an exact copy of the GOUT PAL soundtrack. 

Post
#758167
Topic
Star Wars GOUT in HD using super resolution algorithm (* unfinished project *)
Time

At this point I have two options:

1) Use commercially available software

2) Write my own super resolution algorithm

I will first test the commercially available software, which in this case involves two choices: STOIK video enhancer and Infognition video enhancer. Both are relatively easy to use. My first tests indicate the Infognition algorithm clearly outperforms the STOIK algorithm. However, the Infognition algorithm sometimes results in clearly visible artifacts. I'm now working on a way around this. The preliminary results look promising. I think I will be able to show some screenshots pretty soon. To be continued...

Post
#757607
Topic
Star Wars GOUT in HD using super resolution algorithm (* unfinished project *)
Time

As I'm sure DJ and You_Too have experienced there are quite a few methods of upscaling. The devil is in the details as they say... I'm mostly interested in the upscale of the GOUT, and will leave the restoration, which is a somewhat subjective process, to others that are more capable. 

Post
#757602
Topic
Star Wars GOUT in HD using super resolution algorithm (* unfinished project *)
Time

Yes, it is a similar principle. Of course you will never be able to obtain the true HD source material. It will drastically improve the quality of the GOUT though with a frame detail somewhere between standard definition and true HD. In my view this is the closest you can get to a HD original trilogy, outside of the massive achievement of Harmy's despecialized edition. I do believe it is an interesting experiment in itself to see what the maximum quality is in terms of detail that can be squeezed from those three imperfect bonus DVDs.

Post
#757585
Topic
Star Wars GOUT in HD using super resolution algorithm (* unfinished project *)
Time

Hello everyone,

Since I have a background in image analysis and enhancement, I thought I would have a go at enhancing the GOUT to high definition using a super resolution algorithm. Rather than simply upscaling the frames, a super resolution algorithm uses neighbouring frames to reconstruct a high definition frame.

The goal of this project:

Create a 1080p high definition anamorphic version of the GOUT in the form of one 25 GB mkv file for each film.

Next to having significantly increased detail, the upscales will have significantly less grain and aliasing.

The films will have the GOUT color palette, and will stay true to it’s source, the master tapes that spawned the Star Wars Trilogy - The Definitive Collection laserdiscs, and of course the GOUT DVDs themselves.

The source:

The NTSC versions of the 2006 Star Wars bonus DVDs aka the GOUT.

For more information about super resolution:

http://en.m.wikipedia.org/wiki/Superresolution