Color Sonification for the Visually Impaired

Abstract We present a software tool developed to help the visually impaired to perceive characteristics of the environment related to color and luminosity. The tool converts color information extracted from images into sound, where the images can be still images, or video frames from live or stored video. The color information is extracted from the hue, saturation and value attributes, which are mapped into audio attributes directly related to the perception of pitch, timbre and loudness. The tool can be used to gather information about the range of colors present in the images, presence or absence of light sources as well the location and shape of the objects in the images. It is useful for blind people, but it has also applications in other areas such as chemistry and arts.