Luminance-preserving and temporally stable daltonization

Abstract

It is difficult for people with color vision deficiency (CVD) to distinguish between certain colors, e.g., reds and greens may be indistinguishable, causing a loss of information. Image recoloring, daltonization, techniques aim to improve the experience for people with CVD. Preserving luminance between the original image as seen by a person with normal color vision and someone with a CVD assists in preserving image appearance. Conventional algorithms attempt to daltonize images by exploiting the content of the image itself. While this is a suitable idea for an image in isolation, temporal inconsistencies (e.g., flickering) occur when applied to a stream of images, as a color c could be mapped to a color a in one frame and b in another. In contrast, the luminance-preserving technique operates on pixels and provides a consistent mapping and therefore is temporally stable.