Abstract
We are using color in many aspects of daily life. For instance, when seeing a color-coded image such as a subway map and a weather map, we distinguish objects or identify an object by color. Additionally, when seeing a traffic signal and when selecting ripe tomatoes from ones at various stages of ripeness, we determine their condition according to their color. In the former case, it is necessary to distinguish regions painted in different colors, but it is not necessary to know color of each region. By contrast, in the latter case, it is necessary not only to distinguish colors but also to know color of each object because each color represents a state.
However, in both cases, it is often difficult for people with color blindness. With the aim of solving the problem in the latter case, we developed a color transform method for assisting people with color blindness to guess a normal color, and also developed a software in which that method was implemented.
