ABNORMAL AREA DETECTION DEVICE AND ABNORMAL AREA DETECTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a high speed and general abnormal region detection device for highly precisely detecting the presence and position of abnormality by using higher-order local autocorrelation features.

SOLUTION: This abnormal area detection device is provided with a means for extracting feature data by higher-order local autocorrelation for every pixel from image data; a means for adding the feature data about the pixel group of a predetermined range including pixels for every pixel; a means for calculating an index showing the abnormality of the feature data to a partial space showing a normal region; a means for deciding abnormality based on the index; and a means for outputting the pixel position decided to be abnormal. This abnormal area detection device may be provided with a means for extracting a plurality of higher-order local autocorrelation feature data whose displacement width is different and a means for searching a partial space showing a normal area based on main component vectors by a main component analyzing method from the feature data. Thus, it is possible to decide abnormality according to pixels, and to accurately detect the position of an abnormal area.

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