| 摘要 |
<p>PURPOSE:To easily make image information visible even in a state that plural image information are superposed and displayed, and to efficiently execute editing, by executing the logical operation to image information stored in a storing means, and image information superposed to said image information, in accordance with a designation by a designating means. CONSTITUTION:For instance, by a mouse 16, a first image information P1 is instructed, and thereafter, the display center of the first image information in a second image information P2 is instructed. Also, an icon IC5 for showing overwrite is instructed, the first image information P1 is read out of a page buffer 29 in accordance with the command of a CPU 12, and supplied to a display information control part 28 through a bus control part 25. In such display information control part 28, the first image information supplied through an interface 28a is supplied to an arithmetic part 28c, and also, the second image information P2 read out of a bit map memory 28b is supplied to this arithmetic part 28c. In the arithmetic part 28c, an overwrite arithmetic operation is executed in accordance with the superposed position of the first image information P1 and the second information P2.</p> |
