KR960015338A - Image Change Detection Circuit in Thermal Imager - Google Patents

Image Change Detection Circuit in Thermal Imager Download PDF

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Publication number
KR960015338A
KR960015338A KR1019940026371A KR19940026371A KR960015338A KR 960015338 A KR960015338 A KR 960015338A KR 1019940026371 A KR1019940026371 A KR 1019940026371A KR 19940026371 A KR19940026371 A KR 19940026371A KR 960015338 A KR960015338 A KR 960015338A
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KR
South Korea
Prior art keywords
digital
video signal
signal
analog
frame
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Application number
KR1019940026371A
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Korean (ko)
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KR100313278B1 (en
Inventor
남상욱
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김광호
삼성전자 주식회사
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Priority to KR1019940026371A priority Critical patent/KR100313278B1/en
Publication of KR960015338A publication Critical patent/KR960015338A/en
Application granted granted Critical
Publication of KR100313278B1 publication Critical patent/KR100313278B1/en

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems

Abstract

열상장비에 있어서 본 발명에 의한 영상변화 감지회로에서는 하나의 프레임 메모리를 사용하여 이전 프레임 영상신호와 현재 프레임 영상신호의 동일 유무를 판단하여 미리 설정해 둔 정도를 초과한 경우 영상에 변화가 있는 것으로 판단하여 경보를 울림으로써 침입자의 유무를 쉽게 파악할 수 있는 이점이 있다.In the thermal imaging equipment, the image change detection circuit according to the present invention uses one frame memory to determine whether the previous frame video signal and the current frame video signal are the same and to determine that there is a change in the image when the preset level is exceeded. By alerting you there is an advantage that you can easily determine the presence of intruders.

Description

열상장비에 있어서 영상변화 감지회로Image Change Detection Circuit in Thermal Imager

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명에 의한 영상변화 감지회로의 일실시예에 따른 회로도이다.2 is a circuit diagram according to an embodiment of an image change detection circuit according to the present invention.

Claims (4)

물체 및 배경으로 부터 나오는 적외선을 감지하는 적외선 감지기;와, 상기 적외선 감지기에서 출력되는 적외선 영상신호를 디지탈 영상신호로 변환하는 아날로그/디지탈 변환기와, 상기 아날로그/디지탈 변환기에서 출력되는 디지탈 영상신호를 디스플레이하는데 필요한 소정의 신호처리를 행하는 디지탈신호처리기와, 상기 디지탈신호처리기에서 출력되는 디지탈 영상신호를 필터링하는 디지탈 필터와, 상기 디지탈 필터에서 출력되는 디지탈 영상신호를 아날로그 영상신호로 변환하는 디지탈/아날로그 변환기와, 상기 디지탈/아날로그 변환기에서 출력되는 아날로그 영상신호를 디스플레이하는 디스플레이수단을 구비하는 열상장비에 있어서, 상기 아날로그/디지탈 변환기에서 출력되는 디지탈 영상신호를 프레임 단위로 저장하기 위한 프레임 메모리; 상기 프레임 메모리에서 독출되는 이전 프레임 영상신호와 입력되는 현재 프레임 영상신호를 비교하여 상기 이전 프레임 영상신호와 상기 현재 프레임 영상신호가 서로 다른 경우 소정의 신호를 출력하기 위한 비교기; 상기 비교기로 부터 소정의 신호가 출력될 때마다, 미리 설정된 초기값에서 부터 카운트를 시작하는 카운터; 및 상기 카운터에서의 카운트결과, 소정의 값을 초과한 경우 경보를 울리는 경보기를 포함하는 것을 특징으로 하는 영상변화 감지회로.An infrared detector for detecting infrared rays from an object and a background; an analog / digital converter for converting an infrared image signal output from the infrared detector into a digital image signal; and a digital image signal output from the analog / digital converter; A digital signal processor for performing a predetermined signal processing required for performing the digital signal processing, a digital filter for filtering the digital video signal output from the digital signal processor, and a digital / analog converter for converting the digital video signal output from the digital filter into an analog video signal. And a display means for displaying an analog video signal output from the digital / analog converter, the thermal imager comprising: a frame method for storing the digital video signal output from the analog / digital converter on a frame-by-frame basis; Mori; A comparator for comparing a previous frame video signal read out from the frame memory with a current frame video signal and outputting a predetermined signal when the previous frame video signal and the current frame video signal are different from each other; A counter that starts counting from a preset initial value each time a predetermined signal is output from the comparator; And an alarm that sounds an alarm when a count result of the counter exceeds a predetermined value. 제1항에 있어서, 상기 회로는 상기 아날로그/디지탈 변환기에서 출력되는 현재 프레임의 영상신호를 일시적으로 저장하기 위한 래치를 더 포함하는 것을 특징으로 하는 영상변화 감지회로.The image change detection circuit of claim 1, wherein the circuit further comprises a latch for temporarily storing an image signal of a current frame output from the analog / digital converter. 제2항에 있어서, 상기 래치는 현재 프레임의 영상신호가 상기 프레임 메모리에 기입되기 전에 메모리 리드신호에 의해 이전 프레임의 영상신호를 독출해야 하므로 상기 메모리 리드신호의 반주기에 해당하는 기간 동안 현재 프레임의 영상신호를 저장하는 것을 특징으로 하는 영상변화 감지회로.The method of claim 2, wherein the latch is required to read the video signal of the previous frame by the memory read signal before the video signal of the current frame is written to the frame memory. An image change detection circuit, characterized by storing an image signal. 제1항에 있어서, 상기 회로는 상기 카운터에서의 카운트결과가 소정의 값을 초과한 경우 출력되는 신호에 의해 턴온되는 트랜지스터를 구비한 경보기구동부를 더 포함하는 것을 특징으로 하는 영상변화 감지회로.The image change detection circuit according to claim 1, wherein the circuit further comprises an alarm driving unit having a transistor turned on by a signal outputted when the count result at the counter exceeds a predetermined value. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940026371A 1994-10-14 1994-10-14 Image change detection circuit in thermal image system KR100313278B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940026371A KR100313278B1 (en) 1994-10-14 1994-10-14 Image change detection circuit in thermal image system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940026371A KR100313278B1 (en) 1994-10-14 1994-10-14 Image change detection circuit in thermal image system

Publications (2)

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KR960015338A true KR960015338A (en) 1996-05-22
KR100313278B1 KR100313278B1 (en) 2001-12-28

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100345441B1 (en) * 2000-01-14 2002-07-26 국방과학연구소 Nonuniformity correction method and apparatus for thermal imaging system
KR100390316B1 (en) * 2001-09-21 2003-07-04 삼성탈레스 주식회사 Method for correcting non-uniformity of images in a thermal lnaging device
KR20030067212A (en) * 2002-02-07 2003-08-14 삼성탈레스 주식회사 Surveillance and security methode using thermal image system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100345441B1 (en) * 2000-01-14 2002-07-26 국방과학연구소 Nonuniformity correction method and apparatus for thermal imaging system
KR100390316B1 (en) * 2001-09-21 2003-07-04 삼성탈레스 주식회사 Method for correcting non-uniformity of images in a thermal lnaging device
KR20030067212A (en) * 2002-02-07 2003-08-14 삼성탈레스 주식회사 Surveillance and security methode using thermal image system

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