| 摘要 |
PURPOSE:To reduce the rate of mis-recognition by substituting a mark decided for an ideal pattern in advance into an original picture pattern at the point of time of detection by a detecting circuit so as to eliminate adverse effect of disturbance of a picture data at input. CONSTITUTION:A picture data 201 from a reading section 101 is written in a memory 104 as a memory write picture signal 203 via a selecting circuit 103. A control section 102 outputs a memory control signal 204 corresponding to a write address and a write pulse in this case, for attaining the write control. When the write of a picture data corresponding in the memory 104 is finished, the control section 102 enters a detecting routine of a specific mark, and a data included in the range of mark detection is transmitted to a mark detecting section 106 via a sharing circuit 105. When it is confirmed to be a specific mark, a signal of the specific pattern is generated from a pattern generating circuit 108, a selecting signal 202 is switched and the signal 209 of specific pattern is transmitted to the memory 104. |
