| 摘要 |
PROBLEM TO BE SOLVED: To provide a coordinates input device capable of stably detecting an image by improving the stability of image reading without reducing operation time. SOLUTION: This coordinates input device is provided with a code symbol illuminator and a device for intermittently turning on the illuminator and adjusts the lighting time of the illuminator. Reading facility is detected by the brightness, visibility, distortion quantity, passing speed, error correction rate, etc., of a read image. |
