[특허]Method of encoding a digital image using iterated image transformations to form an eventually contractive map

Method of encoding a digital image using iterated image transformations to form an eventually contractive map 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-009/36
출원번호	US-0860648 (1992-03-30)
발명자 / 주소	Jacobs Everett W. (San Diego CA) Boss Roger D. (San Diego CA) Fisher Yuval (La Jolla CA)
출원인 / 주소	The United States of America as represented by the Secretary of the Navy (Washington DC 06)
인용정보	피인용 횟수 : 30 인용 특허 : 0

초록 ▼

A method is provided for encoding an image in an iterated transformation image compression system. The image, represented by an array of pixels, is partitioned into ranges and domains. A transformation is generated for each domain such that no transformation is constrained to be contractive. Each domain\s transformation is optimized in terms of the intensity scaling and offset coefficients. A domain and corresponding optimized transformation is selected that minimizes transformation error data. These steps are repeated for a chosen plurality of the ranges that form a non-overlapping tiling of the image and such that the corresponding optimized transformations associated with the chosen plurality form an eventually contractive map. Information that identifies each of the chosen plurality of the ranges and the selected domains and corresponding optimized transformations is then stored in an addressable memory as an encoding of the image.

대표청구항 ▼

A method of data compression for compressed data storage or transmission over a data link of compressed data representing an image, said image being comprised of an array of pixels, each pixel having a position in said array, comprising the steps of: acquiring a digital image that is a digital signal representation of said image, said digital image being represented by an array of pixel values defining an entire image area, each pixel value being defined by a three-dimensional vector identifying the position of the pixel in the array and an intensity level of the pixel; partitioning the digital image into ranges, each range being a subset of the image area such that the set of ranges tile said image; partitioning the digital image into domains, each domain being a subset of the image area; generating for each range which is to be encoded a transformation for each member of said set of domains, said transformation comprising positional scaling coefficients and an intensity scaling coefficient, and further comprising positional offset coefficients and intensity offset coefficients, wherein at least one of the transformations is non-contractive; using each said transformation to transform the corresponding member of said set of domains into a corresponding transformed digital image scaled in size and intensity to map onto each range which is to be encoded; optimizing each said transformation in terms of the intensity scaling and offset coefficients, wherein an optimized transformation is indicative of a corresponding optimized transformed digital image for the associated range and may be non-contractive; comparing each said optimized transformed digital image with the associated range to provide error data as a function of the difference therebetween; selecting the domain and corresponding optimized transformation that minimizes the error data for the associated range such that some iterate of the entire set of said selected optimized transformations is contractive, thereby forming an eventually contractive map; storing in an addressable memory information that represents said image by the digital representation of said set of encoded ranges, domains and corresponding optimized transformations.

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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 of encoding a digital image using iterated image transformations to form an eventually contractive map 원문보기

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Method of encoding a digital image using iterated image transformations to form an eventually contractive map 원문보기

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