Abstract
Several image recoloring methods have been proposed to compensate for the loss of contrast caused by color vision deficiency (CVD). However, these methods only work for dichromacy (a case in which one of the three types of cone cells loses its function completely), while the majority of CVD is anomalous trichromacy (another case in which one of the three types of cone cells partially loses its function). In this paper, a novel degree-adaptable recoloring algorithm is presented, which recolors images by minimizing an objective function constrained by contrast enhancement and naturalness preservation. To assess the effectiveness of the proposed method, a quantitative evaluation using common metrics and subjective studies involving 14 volunteers with varying degrees of CVD are conducted. The results of the evaluation experiment show that the proposed personalized recoloring method outperforms the state-of-the-art methods, achieving desirable contrast enhancement adapted to different degrees of CVD while preserving naturalness as much as possible.
Highlights
T HREE kinds of cone cells, so-called L-cones, M-cones, and S-cones, are distributed on the retina of the human eye and are sensitive to long, medium, and shortwavelength visible light, respectively
Approximately 200 million people suffer from color vision deficiency (CVD), which is related to abnormalities in cone cells, and no medical cure is available [1]
To address the abovementioned problem, this paper proposes a novel personalized recoloring method that adapts contrast enhancement and naturalness preservation based on individual degrees of CVD
Summary
T HREE kinds of cone cells, so-called L-cones, M-cones, and S-cones, are distributed on the retina of the human eye and are sensitive to long-, medium-, and shortwavelength visible light, respectively These cone cells play a critical role in forming the color vision of an individual. The abnormal cone is assumed to lose its function completely; in anomalous trichromacy, only a part of the function is lost. Both anomalous trichromacy and dichromacy can be classified as protan, deutan, or tritan defects depending on whether the abnormalities occur in the L-, M-, or S-cones, respectively. Deutan, and tritan defects in anomalous trichromacy and dichromacy are named protanomaly, deuteranomaly, tritanomaly, protanopia, deuteranopia, and tritanopia, respectively
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