A Way of Color Image Processing for the Colorblinds Considering the Color Universal Design

Abstract

This paper proposes a way of reducing the number of colors contained in a JPEG image and remove block noise at the same time. The main purpose of this research is converting a kind of color images, such as Tokyo Metro map, to easily recognizable ones. When the number of colors in a color image is appropriately small, we can assign different gray level for each color then convert it to gray scale image without any information loss. But if the number of colors are not small, the converted monochrome images are not easy to recognize the contents. Most of colorblinds can recognize some different colors, so we propose new converting way to give some colors to the converted gray scaled image.