| 摘要 |
PURPOSE:To speedily and easily measure the size, etc., of an object in an enlarged image by displaying the whole image of the object of measurement statically, specifying positions on the object in a partial enlarged image, and displaying the current position of the enlarged image on the whole image one over another. CONSTITUTION:The whole image of the object of measurement is displayed fixedly at the left upper part of the screen of a monitor device by a whole-body optical system 60 through a TV camera 70. The enlarged image obtained by an enlargement optical system 62 is also displayed at the left upper part. The position of the optical system 62 is detected by a linear displacement detector and displayed as a bright-point mark on the whole image. Then, a table is so moved that the mark approaches a desired target value. Then when an edge line G-G to be measured is displayed, the position and direction of an edge detection path are determined as shown by an arrow A B and an edge detection button is turned on to detect the length L1 from the center of the screen at a point H. The table is moved to display a desired enlarged image including an edge line J-J on the opposite side and the length L2 from the center of the screen at an edge point K is found similarly. Thus, the dimension between the edge points H and K is found.
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