[특허]Object tracking method for automatic zooming and the apparatus therefor

Object tracking method for automatic zooming and the apparatus therefor 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04N-005/232
출원번호	US-0134833 (1993-10-12)
우선권정보	KR-0018552 (1992-10-09); KR-0018663 (1993-09-16)
발명자 / 주소	Yu Kyeong-su (Suwon KRX)
출원인 / 주소	Samsung Electronics Co., Ltd. (Kyungki KRX 03)
인용정보	피인용 횟수 : 140 인용 특허 : 0

초록 ▼

An object tracking apparatus for an automatic zoom lens control in a video camera includes a memory for storing data for zoom track lines showing the relationship between the distance variation of a zoom lens and the distance variation of a focus lens while the distance of an object is kept constant, a zoom encoder for producing a zoom position signal showing the zoom lens position, a microcomputer for detecting the variation amount of the zooming position, and a zoom motor for variably controlling the zoom lens position corresponding to the detected zoom speed. A corresponding method for automatic object tracking using a zoom lens is also described.

대표청구항 ▼

An object tracking method for maintaining an image size constant during automatic zooming in a video camera having an internal memory for storing data defining a plurality of zoom track lines, each of said zoom track lines showing a relationship between distance variation of a zoom lens and a distance variation of a focus lens for a respective fixed distance, and a zoom lens operatively coupled to a zoom driving circuit having a variable picture-enlarging function and an AF control function for detecting an AF evaluation value using a value in which a focusing area corresponding to the distance variation of a photographed object input from a charge-coupled device (CCD) is integrated for a predetermined field period, wherein the zoom driving circuit further comprises a computer for receiving zoom track line data, receiving detected zoom and focus lens positions, calculating a required distance variation and speed of driving the zoom lens, and outputting to a zoom lens driving circuit data regarding zoom lens distance variation, so as to perform a zooming operation, said method comprising the steps of: setting an automatic zooming mode for maintaining a constant size of said photographed object within a screen; detecting a focal length corresponding to the initial zooming position; reading out optimal focus position data corresponding to a detected initial zooming position from said internal memory so as to detect an object distance using one of said zoom track lines corresponding to the data; determining an initial size of the viewed object using the detected initial zooming position, initial object distance and a vertical length of a CCD screen; reading out optimal focus position data corresponding to the detected distance variation of said photographed object from said internal memory so as to detect present object distance using one of said zoom track lines corresponding to the data; calculating the focal length of a zoom lens varying corresponding to the distance variation of said photographed object, using the detected initial object distance, the present object distance and the vertical length of the CCD screen; comparing the detected initial object distance and the present object distance so as to determine the zooming direction; calculating the variation amount of a zoom position and a zoom lens driving speed corresponding to calculated distance variation of said photographed object: and driving the zoom driving circuit in response to the zoom variation and zoom lens driving speed amount corresponding to the calculated varying focal length in the WIDE or TELE direction according to the result of the comparing step.

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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

Object tracking method for automatic zooming and the apparatus therefor 원문보기

초록 ▼

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연구과제 타임라인

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연합인증

Object tracking method for automatic zooming and the apparatus therefor 원문보기

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연구과제 타임라인

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