We introduce a line reconstruction algorithm that aims to tackle the distribution shift problem seen in 1080p anime. FSRCNNX and Anime4K are real-time while waifu2x and Real-ESRGAN are not. The images are sorted by algorithm speed, bicubic being the fastest. Results from the experimental SRGAN shaders for 360p -> 4K: (zoom in to view details) What Anime4K does provide is a way to upscale, in real time, 1080p anime for 4K screens while providing a similar effect to SRGANs and being much better than waifu2x (See comparisons).Ĭurrently, research is being done on better real-time upscaling for lower resolution or older content. This is also not replacement for SRGANs, as they perform much better on low-resolution images or images with lots of degradation (albeit not in real time). Older anime (especially pre-digital era production) have artifacts that are very difficult to remove, such as bad deinterlacing, camera blur during production, severe ringing, film grain, older MPEG compression artifacts, etc. ForewordĪnime4K is optimized for native 1080p anime encoded with h.264, h.265 or VC-1.Įven if it might work, it is not optimized for downscaled 720p, 480p or standard definition anime (eg. If you (as a person or a company) own the art and do not wish it to be associated with this project, please contact us at and we will gladly take it down. All rights are reserved to their original owners. Re-encoding anime into 4K should be avoided as it is non-reversible, potentially damages original content by introducing artifacts, takes up to O(n 2) more disk space and more importantly, does so without any meaningful decrease in entropy (lost information is lost).ĭisclaimer: All art assets used are for demonstration and educational purposes. The simplicity and speed of Anime4K allows the user to watch upscaled anime in real time, as we believe in preserving original content and promoting freedom of choice for all anime fans. Anime4K is a set of open-source, high-quality real-time anime upscaling/denoising algorithms that can be implemented in any programming language.

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