| 摘要 |
<p>PURPOSE:To improve the accuracy of reading by incorporating a CCD in a coordinate reader, detecting the coordinates of a current position by two or more detecting means or the like and operating and numerizing the parallel movement and turning angle of a cursor part. CONSTITUTION:The coordinate reader is provided with a reading part 3 on a linear graphic 2a drawn on a drawing 2 laid on a plane base plate 1. A transparent window 3a for the visual field of a camera is formed on the center part of the reading part 3 and detecting coils are embedded on its both the sides. A CCD camera 6 is arranged on the upper part of the transparent window 3a to convert the linear graphic 2a photoelectrically through a photoelectric converting element 8. Visual data through the camera 6 are numerized by a picture processing part 20. The positional information (the distance of parallel movement and the angle of rotation) of the camera 6 is obtained by the detecting coils 4, 5 and the coefficient of affine transformation is calculated by an arithmetic circuit 21. An output signal F corresponding to the coefficient and the numerized output signal B are operated by an arithmetic circuit 23 to obtain a conversion signal D every movement.</p> |
