Pixel art scaling algorithms are graphical filters that are often used in video game emulators to enhance 2D graphics. The re-scaling of pixel art is a specialist sub-field of image rescaling. As pixel art graphics are usually in very low resolutions, they rely on careful placing of individual pixels, often with a limited palette of colors. This results in graphics that rely on a high amount of stylized visual cues to define complex shapes with very little resolution, down to individual pixels. This makes image scaling of pixel art a particularly difficult problem. A number of specialized algorithms...