Abnormality detection system, learning apparatus, abnormality detection program, and learning program

Abstract

Stable determination accuracy is secured regardless of an image size, in abnormality detection of detecting a visual defect of an object. An abnormality detection system includes an input unit, a feature extractor, an image generator, and a detector. The input unit acquires inspection images of a target object, the inspection images having different image sizes each of which is equal to or more than a predetermined size. The feature extractor is previously learned to extract a feature map from training images including a non-defective image of the target object. The image generator is previously learned to restore the training images from the feature map extracted by the feature extractor. The detector compares the inspection image of the target object, which is an inspection target, the inspection image being input to the input unit, with a corresponding restored image restored from the inspection image by the feature extractor and the image generator. The inspection image has one of the different image sizes each of which is equal to or more than the predetermined size. The detector detects an abnormality of the target object, based on a calculated similarity.

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