| 摘要 |
<P>PROBLEM TO BE SOLVED: To extract a position of an object in the unit of sub-pixel. <P>SOLUTION: An edge pixel, density gradient direction and edge position in the unit of sub-pixel are extracted from a model image obtained by photographing a high-quality model of the object and registered in a hard disk 14. After a processing object image is inputted, a CPU 11 obtains a position of an image region corresponding to the model image and after that, extracts an edge pixel whose edge position in the unit of sub-pixel is related to a corresponding pixel on the model image side in that image region. The edge position in the unit of sub-pixel is extracted for these edge pixels and quantity of deviation between the extracting position and the edge position on the model image side is calculated. The position in the unit of pixels is corrected with an average value of the quantity of deviation obtained from each edge pixel so as to obtain a real position of the object. <P>COPYRIGHT: (C)2007,JPO&INPIT |
