Video Upscaling questions?

[bakerboy]

bakerboy, special thanks for the "experience" info. I applaud your setting up a A/B test. Just off the top of my inexperienced head, I suspect "diminishing returns" the better your source material is. And I was wondering what the finished file size would be, so thank you for providing that as well.

Out of curiosity
1) what resolution was your original file? Was it 1920x1080? 1280x720?
2) What was the target resolution?
3) How long did it take for your hardware to process the file?
4) Also, what are your hardware specs?

I did say that we are NOT experts and any of the geeky stuff, we produce movies... all info I got is

The original was 720 x 404 , the end was 1280 x 720 if that makes any sense.
The conversion took almost 3 hours.

Mac processor Apple M2 16 GIGs OS Ventura

[SilentHunter]

Sample Picture from 640 x 480 to 4K

I think you overlooked something
You combined the original small pic and the upscaled pic into a singel pic with very low resolution so all the upscaling effects are gone since both pics are reduced to the same small size.

For that reason I suggested to open the full picture by click on it

[BobDarkroom]

Sample Picture from 640 x 480 to 4K

I think you overlooked something
You combined the original small pic and the upscaled pic into a singel pic with very low resolution so all the upscaling effects are gone since both pics are reduced to the same small size.

For that reason I suggested to open the full picture by click on it

Well that's what I did and it's not a 4k picture. It's only 430 x 646 pixels so each half is only 430 x 323 pixels
That's far from 4k which is 2880 x 2160 pixels for a 4:3 aspect ratio picture.
Try it yourself and you'll see what I mean. Top and bottom of your picture look almost identical.

You cannot combine in a single picture one half at 640 x 480 and the other half at 4k i.e. 2880 x 2160.

You need to put both images on a large enough canvas so that they both appear with their actual size like I did with the example I posted.

[SilentHunter]

I don't know what you do. I use Edge, if I open the picture it has the size of 1600x2400 Pixel. Yes it was reduced from 4k to upload it.

[yyy02]

I don't know what you do. I use Edge, if I open the picture it has the size of 1600x2400 Pixel. Yes it was reduced from 4k to upload it.

Not trying to prolong the argument, guys, adding thoughts from my perspectve.

https://ralphus.net/thegimpforum/downlo ... &mode=view

Maybe Bob DarkRoom has a point. The 480 image of the flower, is enlarged to be the same size as the AI-treated (for lack of a better term) image. It shows the treated image to be of much better quality, mostly in the clarity and in the lack of pixelation (found in the original) 480 image.

Bob, it's difficult to easily compare your two images because of the size difference, and also because your original image was of better quality. As I said earlier, I think when you upscale an image of better original quality, the results will be of "dimishing returns".

So I'm a little confused, but my initial viewing shows much better quality in the AI-treated version?

The 480 image of the flower is magnified to match the size of the AI version. But that's the whole point of upscaling an image/video clip, right? To view a larger version of the original, with better/improved quality? So in that case, it would prove the point of upscaling? Because magnification by the computer is used when you make a video "larger"?

Am I making sense?

And in any case, I'm simply looking to make ancient videos (240/360/480) a bit larger, maybe up to 720p, with increased quality. I think 480 is the minimum acceptable treated size.

[wulf]

I don't know if the tech you all are discussing will help the photos (vid caps) from Hiddenpleasures, but might be a good experiment to try if someone wants to give it a shot. And there's no need for a before and after, because we all no how crappy HP's images were.

[hornythumb]

I don't know if the tech you all are discussing will help the photos (vid caps) from Hiddenpleasures, but might be a good experiment to try if someone wants to give it a shot. And there's no need for a before and after, because we all no how crappy HP's images were.

Good idea, and we need a lot more barb wired gimps here.

[yyy02]

I don't know if the tech you all are discussing will help the photos (vid caps) from Hiddenpleasures, but might be a good experiment to try if someone wants to give it a shot. And there's no need for a before and after, because we all no how crappy HP's images were.

Guys? Would you mind taking a shot, as I'm currently in the planning stages and don't have upgraded hardware yet?

And I don't know if you can toggle the AI part off/on, as I wouldn't mind seeing the images just upscaled, without any other changes.

TIA.

[wulf]

I don't know if the tech you all are discussing will help the photos (vid caps) from Hiddenpleasures, but might be a good experiment to try if someone wants to give it a shot. And there's no need for a before and after, because we all no how crappy HP's images were.

Good idea, and we need a lot more barb wired gimps here.

I agree, barbed wire is always fun when used properly.

[BobDarkroom]

I don't know what you do. I use Edge, if I open the picture it has the size of 1600x2400 Pixel. Yes it was reduced from 4k to upload it.

I use Firefox but in the meantime I figured out why I thought it was a small size image.
Initially I clicked on the image to open it and then I went back to the GIMP page and saved the image from there.
That saved image was very small, probably because on the GIMP page the image is scaled down.
So, I tried again by right clicking on it and opening it in a new tab to open it in full size. After saving it from the new tab, I got the full size 1600 x 1200 pic !
Zooming in clearly shows the improved sharpness and the smoothing of areas that had visible pixel boundaries.

But... what I really meant to say is that in the end you made 2 images of the same size. To do that you had to magnify the original to 800 x 1200 and resize the 4k version also to 800 x 1200 to combine both in a single 1600 x 1200 pic.
That's fine for me but I was wondering if that wouldn't have an adverse effect on the quality of the reduced 4k pic.

The image that I posted a few days ago contains the original and the 4x upscaled version in a single pic at their respective size.
It was intended to show that a small pic of reasonable quality can be upscaled with good results.

However, I also found out that it doesn't work well with poor quality source images.
Conclusion : AI based picture upscaling software has its limits