[특허]Rotation and scale invariant image finder

[미국특허] Rotation and scale invariant image finder 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-009/64
출원번호	US-0314730 (1999-05-18)
발명자 / 주소	Manickam Swaminathan Roth Scott D. Bushman Thomas W.
출원인 / 주소	Datacube, Inc.
대리인 / 주소	Weingarten, Schurgin, Gagnebin & Hayes LLP
인용정보	피인용 횟수 : 27 인용 특허 : 7

초록 ▼

A system for digital image recognition which combines sparse correlation with image pyramiding to reduce the number of pixels used in correlation provides effective recognition of a reference image template without exhaustive correlation of all pixels in the reference image template. An optimal sparse pixel set is selected from the pixels of the reference image template by correlating the reference image template against a search image scene which is to be searched. Such a sparse pixel set includes those pixels which are optimal in defining the correlation sensitive features of the reference image template. By terminating the accumulation of sparse pixels at an optimal point, performance is maximized without compromising accuracy of recognition. The resultant optimal sparse pixel set is then correlated against the pixels in the search image scene through a series of transformations to find a match of the reference image template within the search image scene.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of computing an optimal sparse pixel set indicative of a reference image template and adapted for grayscale correlation based digital image pattern matching comprising:computing an initial sparse pixel set from a subset of said pixels in said reference image template;initializing, by storing in an optimal pixel accumulator set, said initial sparse pixel set;correlating said optimal pixel accumulator set with said reference image template and said search image scene to determine a candidate optimal pixel based on a correlation score from the subset of pixels of said reference image template not already in said optimal pixel accumulator set;storing, in said optimal pixel accumulator set, said candidate optimal pixel if said candidate optimal pixel is highly influential on said correlation score;building, from among the remaining pixels of said reference image template, said optimal pixel accumulator set by repeating said correlating and said storing;terminating said building when said accumulator sparse pixel set contains an optimal set of pixels according to predetermined accumulation optimization logic; andstoring, in said optimal sparse pixel set said optimal pixel accumulator set.

이 특허에 인용된 특허 (7) 인용/피인용 타임라인 분석

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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

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[미국특허] Rotation and scale invariant image finder 원문보기