| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively and efficiently perform the alignment between a spectacle lens and a lens holder highly precisely in a short period of time. SOLUTION: A lens meter 5 photographs the spectacle lens for processing. An image processing apparatus 6 binarizes the photographed image to extract the feature parameters of individual graphics included in the binarized images, extracts the graphics that the feature parameters meet prescribed conditions as hidden marks previously formed in the spectacle lens, and determines a geometrical center position based on the positions of the hidden marks, and determines the angle deviation of the spectacle lens. A host computer 9 performs angle correction according to the angle deviation of the layout data corresponding to the spectacle lens for processing to obtain the processing center position based on the layout data after the correction. COPYRIGHT: (C)2007,JPO&INPIT
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