Nonlocal Recoloring Algorithm for Color Vision Deficiencies with Naturalness and Detail Preserving People with Color Vision Deficiencies (CVD) may have difficulty in recognizing and communicating color information, especially in the multimedia era. In this paper, we proposed a recoloring algorithm to enhance visual perception of people with CVD. In the algorithm, color modification for color blindness is conducted in HSV color space under three constraints: detail, naturalness and authenticity. A new nonlocal recoloring method is used for preserving details. Subjective experiments were conducted among normal vision subjects and color blind subjects. Experimental results show that our algorithm is robust, detail preserving and maintains naturalness. (Source codes are freely available to noncommercial users at the website ( https:doi.org10.6084m9.figshare.9742337.v2)).

Improving Color Discrimination for Color Vision Deficiency (CVD) with TemporalDomain Modulation Color Vision Deficiency (CVD) is often characterized by the inability to distinguish color due to a defective or missing cone in the eye. Although it is possible to modify the observed color to make it easier for users to distinguish, this can lead to color confusion with unaffected colors. To address this problem we investigate how flicker can assist distinguishing colors for CVD patients. In preliminary study, we evaluated the efficiency of color and brightness modulation with 4 participants with normal vision. Our findings suggests that while brightness modulation was ineffective, color modulation can help users distinguish between different colors.