Measurement of confusion color pairs for dichromats in order to use applications supporting color vision deficiency

Recently, various applications of mobile devices supporting color vision deficiency are released. However, applications supporting color vision deficiency may not work as designed performance. Color calibration and personalization are needed when the user uses such an application, because a color representation performance of devices is distinct from each other, and users may also have individual differences in characteristics of color vision. Thus, confusion color pairs will change slightly. Conversely, it will be a clue for color calibration or personalization in oder to reduce changes. Here, we propose methods determining confusion color pairs by a simple operation to achieve it. We estimate color pairs by the procedure as a bisection method in order to determine them. A user is presented with the three visual stimuli (a reference and two targets). The user selects one of test targets whose color is perceived more similar to reference´s color. We focused on how to select visual stimuli´s colors. We propose two methods to select ones, which are represented the coordinates on u´v´-chromaticity diagram. One method uses colors on a circumference whose center corresponds to the white point. Another method uses colors on parallel lines to the line passing through primary colors (green and blue). We obtained results that it shows comparable performance determining color pairs to previous studies. Results of lines´ method show that performance is better than the circumference method. And, its measurement time is reduced.