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1. JP2007334766 - ABNORMAL AREA DETECTION DEVICE AND ABNORMAL AREA DETECTION METHOD

Office Japan
Application Number 2006167961
Application Date 16.06.2006
Publication Number 2007334766
Publication Date 27.12.2007
Grant Number 4603512
Grant Date 08.10.2010
Publication Kind B2
IPC
G06T 7/00
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
G01B 11/24
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
24for measuring contours or curvatures
G01N 21/956
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws, defects or contamination
95characterised by the material or shape of the object to be examined
956Inspecting patterns on the surface of objects
G06T 1/00
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
1General purpose image data processing
CPC
G06T 7/001
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
0002Inspection of images, e.g. flaw detection
0004Industrial image inspection
001using an image reference approach
G06K 9/522
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
36Image preprocessing, i.e. processing the image information without deciding about the identity of the image
46Extraction of features or characteristics of the image
52by deriving mathematical or geometrical properties from the whole image
522Frequency domain transformation; Autocorrelation
G06K 9/6247
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
62Methods or arrangements for recognition using electronic means
6217Design or setup of recognition systems and techniques; Extraction of features in feature space; Clustering techniques; Blind source separation
6232Extracting features by transforming the feature space, e.g. multidimensional scaling; Mappings, e.g. subspace methods
6247based on an approximation criterion, e.g. principal component analysis
G06T 2207/30141
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
2207Indexing scheme for image analysis or image enhancement
30Subject of image; Context of image processing
30108Industrial image inspection
30141Printed circuit board [PCB]
Applicants NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL & TECHNOLOGY
国立研究開発法人産業技術総合研究所
Inventors OTSU NOBUYUKI
大津 展之
NANRI TAKUYA
南里 卓也
Agents 久保田 直樹
Title
(EN) ABNORMAL AREA DETECTION DEVICE AND ABNORMAL AREA DETECTION METHOD
(JA) 異常領域検出装置および異常領域検出方法
Abstract
(EN)

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.

COPYRIGHT: (C)2008,JPO&INPIT

(JA)

【課題】高次局所自己相関特徴を用いて異常の有無と共にその位置を高い精度で検出できる高速かつ汎用的な異常領域検出装置を提供すること。
【解決手段】異常領域検出装置は、画像データから画素毎に高次局所自己相関によって特徴データを抽出する手段、画素毎に、その画素を含む所定の範囲の画素群について特徴データを加算する手段、正常領域を示す部分空間に対する特徴データの異常さを示す指標を計算する手段、指標に基づき異常判定する手段、異常と判定した画素位置を出力する手段とを備える。変位幅の異なる複数の高次局所自己相関特徴データを抽出してもよい。更に、特徴データから主成分分析手法により主成分ベクトルに基づく正常領域を示す部分空間を求める手段を備えていてもよい。画素対応に異常判定が可能であり、異常領域の位置を正確に検出可能である。
【選択図】図2

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