Add ArtCNN Shaders

[Zabooby]

They outperform ravu, FSRCNNX and krigbilateral in several tests here.

[dyphire]

I have previously tested the effects of the ArtCNN shader, and it shows no significant difference in upscaling of HD content compared to FSRCNNX. It is only slightly stronger in upscaling of SD content than FSRCNNX (both effect poorly, many artifacts). There is no reason to add a similar and not significantly improved shader (both trained based on CNN models), Before this, I had already streamlined the shaders in the configuration for similar reasons: https://github.com/dyphire/mpv-config/commit/bb490595aa60e028f7ef2c69a20d11ee553e4c28, https://github.com/dyphire/mpv-config/commit/7cfec9675a0aef6e19159c1fa750fbfe6b03d493 PS: The comparison here is the normal version of ArtCNN, whose DS variant is catastrophic in upscaling SD content.

Don't blindly trust the results of numerical tests, as the ravu ar shader that performed well in that test also performed poorly in upscaling SD content (more artifacts). So you can see that the upscaling shaders used as benchmarks there are not very recommended in my configuration.

Of course, in terms of upscaling high-definition content, the credibility of that numerical test is still good

[Zabooby]

By content are you referring to anime or live action?

Where in your opinion does nnedi3 fit in, similar to FSRCNNX? Good on hd and bad on sd if so why not remove it too? Similarly where does FSR's use-case lie? Would you agree that Anime4k is worse on hd in terms of destroying original detail, FSRCNNX performs better for me, why do you keep it?

Also what are your thoughts on Cfl or the chroma variant of ArtCNN as a chroma replacement for krigbilateral?

My point in asking these questions is to find the best combination of shaders for anime and live action for both sd and hd content without having a shader folder with 20+ shaders.

[dyphire]

By content are you referring to anime or live action?

both, mainly animation.

Where in your opinion does nnedi3 fit in, similar to FSRCNNX? Good on hd and bad on sd if so why not remove it too?

The biggest feature of nnedi3 is that it hardly produces artifacts during upsampling and suppresses the original artifacts in the image, making its versatility irreplaceable. It is surprising that after so many years, there is still no better algorithm to replace it.

The reason why FSRCNNX is retained is because the poor upscaling effect of SD content is almost a common problem among other shaders except for specific shaders, and its effects on HD content is indeed good.

Similarly where does FSR's use-case lie? Would you agree that Anime4k is worse on hd in terms of destroying original detail, FSRCNNX performs better for me, why do you keep it?

The EASU_rgb variant of FSR often effect similarly to nnedi3 and has lower performance consumption, which is why it is retained.

I also do not recommend using Anime4k for high-definition content as it will disrupt the original details. But its effects on SD content is significantly better than any other shader, with powerful anti aliasing and artifact removal capabilities. You may have noticed that the Anime4k usage I recommended in the configuration does not include its amplification algorithm.

https://github.com/dyphire/mpv-config/blob/014c9dbab084cfe5d6081e4ded6dae389229e42f/mpv.conf#L757-L759

Also what are your thoughts on Cfl or the chroma variant of ArtCNN as a chroma replacement for krigbilateral?

I really don't care much about chroma upscaling. The human eye has low sensitivity to chroma information and it's not worth investing too much effort and performance in it. Krigbilateral is also unnecessary. The method of inferring chroma information through luma information using Cfl shaders may not work well when there is no strong correlation between luma and chroma.

But once again, I don't care about chroma upscaling, so I won't test and compare them. The above is just a subjective judgment.

My point in asking these questions is to find the best combination of shaders for anime and live action for both sd and hd content without having a shader folder with 20+ shaders.

I won't recommend the best combination for anyone because everyone's preferences are different. Shaders with poor effects on SD content have no impact on people who only watch HD content, and for those who like image sharpening, they will not like shaders like nnedi3. So you can only rely on yourself to choose and use the shader scheme that suits you.