| 摘要 |
<p>PURPOSE:To accurately input a picture by calculating positional relations between center positions of pickup coils and actual read coordinates and detecting the error of read coordinates due to pickup coils based on these calculated values. CONSTITUTION:The center position of one pickup coil 4a out of plural pickup coils 4a and 4b is fixed on a tablet board 1 to detect first coordinates, and an image reader 6 is turned at a prescribed angle with the center position of the pickup coil 4a as the center, and thereafter, second coordinates are detected. Positional relations between the center position of the pickup coil 4a and actual read coordinates due to the pickup coil 4a are calculated based on first coordinates and second coordinates, and those between the center position of the other pickup coil 4b and actual read coordinates are calculated by the same operation, and the error of read coordinates due to pickup coils 4a and 4b is detected based on these calculated values. Thus, a picture is accurately inputted.</p> |
