Improvements in upscaling of pixel art

In this paper two approaches to upscaling of low resolution bitmaps created using pixel art digital form are proposed. The methods are aimed to deal with limitations of classical and dedicated algorithms typically used in gaming applications. The proposed spatial methods, proximity-based coefficient correction and transition area restriction, lead to no limitations in scale factor in comparison to the existing pixel-art algorithms. Moreover, in contrast to the classical methods the proposed approaches allow to obtain undistorted and sharp resulting images.