[특허]Method and apparatus for detecting changes in dynamic images

Method and apparatus for detecting changes in dynamic images 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-009/00
출원번호	US-0312049 (1994-09-23)
우선권정보	JP-0345813 (1991-12-27)
발명자 / 주소	Okamoto Yasukazu (Chiba-ken JPX)
출원인 / 주소	Kabushiki Kaisha Toshiba (Kawasaki JPX 03)
인용정보	피인용 횟수 : 58 인용 특허 : 0

초록 ▼

A method and apparatus for detecting changes in dynamic images. The method and apparatus are capable of detecting movement at a high precision of a moving object against a static background, regardless of the variation of the image taking environmental condition, such as a lighting condition. In the apparatus, input images of a moving object are taken against a static background sequentially, and difference images are obtained from successive ones of the input images. Then, an appropriate noise model for a lightness variation due to an image taking environmental condition under which the input images are taken is estimated according to the input images and the difference images. Changed regions in an entire imaging view field are detected according to the input images, the difference images, and the appropriate noise model.

대표청구항 ▼

An apparatus for detecting a moving object in dynamic images, comprising: image input means for sequentially taking input images of the moving object against a static background; difference calculation means for obtaining difference images from successive input images taken by said image input means as picture elements; noise model estimation means for estimating an appropriate noise model representing a lightness variation due to an image taking environmental condition under which the input images are taken by the image input means, the estimation being made according to the input images taken by the image input means and the difference images obtained by the difference calculation means by estimating values of noise model parameters in a regression model, and specifying a ratio of a difference in lightness at each picture element of each difference image with respect to an average difference in lightness over an entire imaging view field of each difference image as a function of lightness at each picture element in each input image expressed in terms of the noise model parameters; change determining means for determining changed regions in the entire imaging view field by compensating for the lightness variation by subtracting from the difference images obtained by the difference calculation means an estimated lightness variation based on the noise model estimated by the noise model estimation means; and detecting means for detecting the moving object in the dynamic images according to the changed regions determined by the change determining means.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Method and apparatus for detecting changes in dynamic images 원문보기

초록 ▼

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Method and apparatus for detecting changes in dynamic images 원문보기

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연구과제 타임라인

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