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A High-Quality Real Time Upscaler for Anime Video


Anime4K is a set of open-source, high-quality real-time anime upscaling/denoising algorithms that can be implemented in any programming language.

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. 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).

A Few Comparisons (1080p to 4K Upscaling)

Denoising is enabled when possible. (Anime4K, waifu2x and NGU)

Disclaimer: All art assets used are for demonstration and educational purposes. All rights are reserved to their original owners. 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.