Abstract: Image data representing a two-dimensional image is stored in N data storage devices driven in parallel. The two-dimensional image is divided into small divisional areas arranged in rectilinearly oriented lines and rows such that the number of areas in each line is equal to 2N and the number of areas in each row is equal to or less than 2N. The small divisional areas are stored in the N data storage devices such that no more than two of the areas in the same line are stored in the same storage device and no more of than two of the areas in the same row are stored in the same storage device. Additionally, two areas from the same line which are stored in the same storage device are positioned either adjacent to one another in the line or at opposite ends of the line and two areas from the same row which are stored in the same storage device are positioned either adjacent to one another in the row or at opposite ends of the row.

Abstract: An information input/output system is made up of an information processing device and a wireless coordinate indicator. The information processing device provided with a display for displaying an object to be processed at a desired position, a position detector for detecting positional information based on indication information from the wireless coordinate indicator, a code extractor for extracting coded information from the indication information, an information controller for storing detected positional information and the extracted coded information by associating the information items with each other, and an information processing device for carrying out predetermined processing. The wireless coordinate indicator provided with a storage device for storing the coded information, and a signal transmission device for transmitting the coded information and the positional information to the information processing device.