| 摘要 |
PURPOSE: To evaluate each position based on each degree of complexity regarding two crossing coordinate axes while updating the position of a reference box in the same shape as the reference pattern and to automatically and objectively set the reference pattern with the image data of the most favorable position as the reference pattern. CONSTITUTION: A CPU 5 stores image data in a window obtained by a camera 4 in an image memory 7, specifies a setting area and an initial reference value Rmin, and sets the position of a reference box to the initial position of the setting area. #1 X/Y conversion and boundary processing are performed to an image in the box at a current position and degree of X and Y complexity CX and CY are obtained. When CX+CY is equal to or less than a threshold, the position is skipped and a next processing is performed. When CX+CY is equal to or more than the threshold, a reference value R=CX/CY-1 is obtained and it is substituted by a reference value Rmin in a RAM 8 along with the coordinate position of the box. This processing is repeated and an ideal position with a small reference value R is stored in the RAM 8. |
