Title:
ABNORMAL REGION DETECTING DEVICE AND ABNORMAL REGION DETECTING METHOD
Document Type and Number:
WIPO Patent Application WO/2007/145235
Kind Code:
A1
Abstract:
A high-speed general-purpose abnormal region detecting device for detecting presence/absence
of an abnormality and its position with high accuracy by using the high-order
local autocorrelation feature. The abnormal region detecting device comprises
means for extracting feature data of each pixel from image data by high-order
local autocorrelation, means for adding feature data on each pixel in a pixel
group in a predetermined range including the pixel, means for computing an index
indicating the abnormality of the feature data in comparison with the normality
of a partial space exhibiting a normal region, means for judging if the region
is abnormal or not on the basis of the index, and means for outputting the position
of the pixel which is judged to be abnormal. A plurality of items of high order
local autocorrelation feature data having different displacement widths may
be extracted. The abnormal region detecting device may comprise means for determining
a partial space representing a normal region depending on the main component
vector by main component analysis scheme from the feature data. Abnormality
judgment for each pixel is possible, and the position of an abnormal region can
be accurately detected.
Inventors:
OTSU, Nobuyuki (Tsukuba Central 2 1-1, Umezono 1-chom, Tsukuba-shi Ibaraki 68, 3058568, JP)
大津 展之 (〒68 茨城県つくば市梅園１－１－１中央第２ 独立行政法人産業技術総合研究所内 Ibaraki, 3058568, JP)
大津 展之 (〒68 茨城県つくば市梅園１－１－１中央第２ 独立行政法人産業技術総合研究所内 Ibaraki, 3058568, JP)
Application Number:
JP2007/061871
Publication Date:
December 21, 2007
Filing Date:
June 13, 2007
Export Citation:
Assignee:
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY (3-1 Kasumigaseki 1-chome, Chiyoda-ku Tokyo, 21, 1008921, JP)
独立行政法人産業技術総合研究所 (〒21 東京都千代田区霞が関１丁目３番１号 Tokyo, 1008921, JP)
OTSU, Nobuyuki (Tsukuba Central 2 1-1, Umezono 1-chom, Tsukuba-shi Ibaraki 68, 3058568, JP)
独立行政法人産業技術総合研究所 (〒21 東京都千代田区霞が関１丁目３番１号 Tokyo, 1008921, JP)
OTSU, Nobuyuki (Tsukuba Central 2 1-1, Umezono 1-chom, Tsukuba-shi Ibaraki 68, 3058568, JP)
International Classes:
G06T7/00; G01N21/956
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