| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image processing method for reducing erroneous detection of a foreign matter caused by non-uniform lighting and refraction of irradiation light upon inspection of a non transparent foreign matter in a transparent container filled with a liquid. Ž<P>SOLUTION: A pseudo reference image is obtained by a noise image reduction processing such as a smoothing processing on an original image of the container to be inspected. A brightness difference from the original image is determined using the brightness of the reference image as a standard, and a differential image is formed. By inspecting the differential image, it is possible to eliminate influence of brightness variations in the image caused by non-uniform lighting and refraction of irradiation light and thereby to reduce erroneous detection. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
