Abstract
There are various purposes and techniques to create digital image data (Raster data). The digital image data of historical materials are open to the public through the Internet homepages due to the improvement of information technologies. These data, however, no more than converted digital image data from photographs. The author examines the future possibilities of the digital image data and values, mainly about designs and applications of the digital image data. The author also examines color saturation, precision and resolution of the digital image data which have boundless potentialities to the future.
