[특허]Method and system for compression and reconstruction of cultural data for use in a digital moving map display

Method and system for compression and reconstruction of cultural data for use in a digital moving map display 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-009/36
출원번호	US-0642481 (1984-08-20)
발명자 / 주소	Chan Luen C. (Indian Harbor Beach FL) Beckwith Paul B. (Indialantic FL) Pearce Jeffrey B. (Melbourne FL)
출원인 / 주소	The United States of America as represented by the Secretary of the Army (Washington DC 06)
인용정보	피인용 횟수 : 34 인용 특허 : 0

초록 ▼

A method and digital system for the compression and reconstruction of cultural data for use with display systems, such as a system for producing a real time moving map display of terrain, provides a modified footprint/common boundary technique for data compression in which the footprint extends forward of the last point generated along a line in the direction of the line to that point. The particular scheme for compressed data reconstruction employs the storage of footprint data in such a manner that change in line direction information is automatically provided along with the necessary delta data information so that the direction of the line can be constantly updated as each point is generated. The compression of area cultural features involves a double compression of data based on a common boundary approach and the inner compression techniques of the modified footprint technique. In addition, in the reconstruction of compressed cultural data, changes in scale factor are accommodated along with feature deselection based on the selected scale factor.

대표청구항 ▼

A method for compressing data which is to produce a linear feature in a display comprising the steps of: storing an address of an initial point at one end of the linear feature; storing an initial direction code identifying the direction of the linear feature at said initial point at one end thereof; and storing a plurality of delta code values which identify a further point and successive points on said linear feature with respect to the direction of said linear feature identified by said initial direction code and the direction for each successive one of the individual points thereon, said delta code values being selected from an elongated footprint pattern of points which is oriented so as to extend at each of said successive points on said linear feature away from that point in the direction of the linear feature at that point, said elongated footprint pattern including a major lobe corresponding to a single quadrant and a contiguous minor lobe at a corner of said quadrant, the orienting of said footprint pattern so as to select said delta code values at each of said successive points including positioning said pattern so that said initial point on the linear feature falls within said minor lobe and said major lobe extends away from said point in the direction of the linear feacture to that point.

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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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연합인증

Method and system for compression and reconstruction of cultural data for use in a digital moving map display 원문보기

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Method and system for compression and reconstruction of cultural data for use in a digital moving map display 원문보기

초록 ▼

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연구과제 타임라인

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이 특허를 인용한 특허 (34)

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