| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for edge extraction capable of stably extracting the edges of an object even if an inspected image contains noise components in the device and method for extracting the edges of the object in the inspected image. <P>SOLUTION: In a rectangular area Q temporarily set in the object P at any position, a brightness projection value accumulated along a first side direction in the rectangular area Q is differentiated along a second side direction perpendicular to the first side direction to provide a differentiated value. The first side direction of the rectangular area q obtained by the maximum differentiated value of the plurality of differential values obtained by shifting the position of the rectangular area Q is considered as the direction of the edges of the object P in extraction. <P>COPYRIGHT: (C)2004,JPO |
