Visual Inspection Device, Visual Inspection Method, And Computer Program

A visual inspection method executable by a visual inspection device which compares a captured image of an inspection object with a group of images of items regarded as non-defective items to make a non-defective/defective determination, the method comprising the steps of

• accepting inputs of a plurality of images constituting a group of images of items regarded as non-defective items and storing these images;
• setting a defect threshold for detecting a defective portion of an inspection object based on the plurality of stored images;
• calculating a defect amount to be compared with the determination threshold for making the non-defective/defective determination on the inspection object with respect to each of the plurality of stored images based on the set defective threshold;
• testing, by statistical processing, whether or not each of the calculated defect amounts is an outlier;
• and
• displaying and outputting outlier information for specifying an image whose defect amount has been tested to be the outlier.

A computer program that is present on a movable recording medium, the computer program executable by a visual inspection device which compares a captured image of an inspection object with a group of images of items regarded as non-defective items to make a non-defective/defective determination, the computer program causing the visual inspection device to function as:

• an image inputting unit for accepting inputs of a plurality of images constituting a group of images of items regarded as non-defective items and storing these images;
• a threshold setting unit for setting a defect threshold for detecting a defective portion of an inspection object based on the plurality of stored images;
• a defect amount calculating unit for calculating a defect amount to be compared with the determination threshold for making the non-defective/defective determination on the inspection object with respect to each of the plurality of stored images based on the set defective threshold;
• an outlier testing unit for testing, by statistical processing, whether or not each of the calculated defect amounts is an outlier;
• and
• an information displaying unit for displaying and outputting outlier information for specifying an image whose defect amount has been tested to be the outlier.