KR970028462A - Method and apparatus for compensating non-identity of focal plane array infrared detector - Google Patents

Method and apparatus for compensating non-identity of focal plane array infrared detector Download PDF

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KR970028462A
KR970028462A KR1019950045835A KR19950045835A KR970028462A KR 970028462 A KR970028462 A KR 970028462A KR 1019950045835 A KR1019950045835 A KR 1019950045835A KR 19950045835 A KR19950045835 A KR 19950045835A KR 970028462 A KR970028462 A KR 970028462A
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고진신
이진걸
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김광호
삼성전자 주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits
    • G01J2001/444—Compensating; Calibrating, e.g. dark current, temperature drift, noise reduction or baseline correction; Adjusting

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  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

본 발명은 촛점면 배열 적외선 검출기의 비동일성 보상방법 및 장치를 개시한다. 본 발명의 장치는 입력영상의 밝기를 감지하여 아날로그 신호를 출력하는 촛점면 배열 검출기와, 촛점면 배열 검출기로부터 출력되는 아날로그 신호를 필터링하는 저역통과필터와, 저역통과필터의 출력을 디지탈로 변환하는 아날로그-디지탈 변환기를 구비하는 촛점면 배열 적외선 검출기의 비동일성 보상장치에 있어서, 아날로그-디지탈 변환기의 출력을 해당 어드레스에 저장하는 FPA 데이타 저장부; 아날로그-디지탈 변환기의 출력중에서 특정 화소부위의 출력을 입력하여 기준잡음성분을 추출하는 기준잡음성분 추출부; 가산기의 출력과 기준잡음성분 추출부의 출력을 입력하여 필터의 특성이 잡음의 전달특성과 유사하도록 적응시키는 적응형 필터; 및 FPA 데이타 저장부의 출력에서 적용형 필터의 출력을 감산하는 연산부를 포함한다.The present invention discloses a method and apparatus for compensating for non-identity of a focal plane array infrared detector. The apparatus of the present invention detects the brightness of an input image and outputs an analog signal, a low pass filter for filtering an analog signal output from the focal plane array detector, and a digital output for converting the output of the low pass filter. An apparatus for compensating for non-identity of a focal plane array infrared detector having an analog-to-digital converter, comprising: an FPA data storage unit for storing an output of an analog-to-digital converter at a corresponding address; A reference noise component extracting unit extracting a reference noise component by inputting an output of a specific pixel portion among the outputs of the analog-digital converter; An adaptive filter adapted to input the output of the adder and the output of the reference noise component extractor so that the characteristics of the filter are similar to those of the noise transfer; And an operation for subtracting the output of the applied filter from the output of the FPA data storage.

따라서, 본 발명은 적응형 필터를 사용하여 필터의 특성이 잡음의 전달특성과 유사하도록 적응시켜 촛점면 배열 적외선 검출기의 출력에서 적응성 필터의 출력을 감산하므로서 촛점면 배열 검출기의 비동일성을 보상할 수 있다.Accordingly, the present invention can compensate for the inhomogeneity of the focal plane array detector by subtracting the output of the adaptive filter from the output of the focal plane array infrared detector by adapting the characteristics of the filter to the noise transfer characteristics using the adaptive filter. have.

Description

촛점면 배열 적외선 검출기의 비동일성 보상방법 및 장치Method and apparatus for compensating non-identity of focal plane array infrared detector

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

제1도는 초점면 배열 적외선 검출기의 평면 구성도.1 is a plan view of a focal plane array infrared detector.

제2도는 종래의 촉점면 배열 적외선 검출기 출력보상장치의 구성도.2 is a block diagram of a conventional tactile plane array infrared detector output compensation device.

제3도는 제2도에 도시한 중간값 검출필터의 상세회로도.3 is a detailed circuit diagram of the intermediate value detection filter shown in FIG.

제4도는 본 발명에 의한 촛점면 배열 적외선 검출기의 비동일성 보상장치의 일실시예를 나타낸 블럭도.4 is a block diagram showing an embodiment of an apparatus for compensating for non-identity of a focal plane array infrared detector according to the present invention.

제5도는 본 발명에 의한 촛점면 배열 적외선 검출기의 비동일성 보상장치의 다른 실시예를 나타낸 블럭도.5 is a block diagram showing another embodiment of a non-identity compensation device of a focal plane array infrared detector according to the present invention.

Claims (7)

촛점면 배열 적외선 검출기의 출력을 영상신호성분과 잡음성분으로 모델링하는 제1단계; 촛점면 배열 적외선 검출기의 균일한 밝기의 빛을 조사하여 기준잡음성분을 추출하는 제2단계; 상기 제2단계에서 추출되는 기준잡음성분을 적응형 필터에 입력하고, 상기 제1단계의 출력에서 적응형 필터의 출력을 감산하여 오차신호를 출력하는 제3단계; 및 상기 제3단계에서 출력되는 오차신호의 평균자승이 최소가 되도록 적응형 필터의 계수를 갱신하여 상기 제1단계에서 출력되는 잡음성분과 유사한 신호를 출력하는 제4단계를 포함하는 촛점면 배열 적외선 검출기의 비동일성 보상방법.A first step of modeling the output of the focal plane array infrared detector into an image signal component and a noise component; A second step of extracting a reference noise component by irradiating light of uniform brightness of a focal plane array infrared detector; A third step of inputting the reference noise component extracted in the second step into an adaptive filter and subtracting the output of the adaptive filter from the output of the first step to output an error signal; And a fourth step of outputting a signal similar to the noise component output in the first step by updating the coefficient of the adaptive filter so that the mean square of the error signal output in the third step is minimized. Method for compensating for non-identity of detectors. 입력영상의 밝기를 감지하여 아날로그 신호를 출력하는 촛점면 배열 검출기와, 촛점면 배열 검출기로부터 출력되는 아날로그 신호를 필터링하는 저역통과필터와, 저역통과필터의 출력을 디지탈로 변환하는 아날로그-디지탈 변환기를 구비하는 촛점면 배열 적외선 검출기의 비동일성 보상장치에 있어서, 아날로그-디지탈 변환기의 출력을 해당 어드레스에 저장하는 FPA 데이타 저장부; 상기 아날로그-디지탈 변환기의 출력중에서 특정 화소부위의 출력을 입력하여 기준잡음성분을 추출하는 기준잡음성분 추출부; 가산기의 출력과 상기 기준잡음 성분 추출부의 출력을 입력하여 필터의 특성이 잡음의 전달특성과 유사하도록 적응시키는 적응형 필터; 및 상기 FPA 데이타 저장부의 출력에서 상기 적응형 필터의 출력을 감산하는 연산부를 포함하는 촛점면 배열 적외선 검출기의 비동일성 보상장치.A focal plane array detector that detects the brightness of the input image and outputs an analog signal, a lowpass filter that filters the analog signal output from the focal plane array detector, and an analog-to-digital converter that converts the output of the lowpass filter into digital An apparatus for compensating for inhomogeneity of a focal plane array infrared detector, comprising: an FPA data storage unit for storing an output of an analog-to-digital converter at a corresponding address; A reference noise component extracting unit extracting a reference noise component by inputting an output of a specific pixel portion among the outputs of the analog-digital converter; An adaptive filter adapted to input an output of an adder and an output of the reference noise component extractor so that the characteristics of the filter are similar to those of the noise transfer; And an operation unit for subtracting the output of the adaptive filter from the output of the FPA data storage unit. 제2항에 있어서, 상기 촛점면 배열 검출기는 입력영상을 감지하여 소정의 아날로그 신호를 출력하는 화소부위와, 기준영상을 감지하여 기준잡음성분을 출력하는 화소부위로 구성함을 특징으로 하는 촛점면 배열 적외선 검출기의 비동일성 보상장치.The focal plane arrangement of claim 2, wherein the focal plane array detector comprises a pixel portion that detects an input image and outputs a predetermined analog signal, and a pixel portion that detects a reference image and outputs a reference noise component. Non-identity compensation device of array infrared detector. 제2항에 있어서, 상기 촛점면 배열 검출기는 입력영상을 감지하여 소정의 아날로그 신호를 출력하는 제1촛점면 배열 검출기와, 기준영상을 감지하여 기준잡음성분을 출력하는 제2촛점면 배열 검출기로 각각 구성함을 특징으로 하는 촛점면 배열 적외선 검출기의 비동일성 보상장치.3. The focal plane array detector of claim 2, wherein the focal plane array detector is a first focal plane array detector that detects an input image and outputs a predetermined analog signal, and a second focal plane array detector that detects a reference image and outputs a reference noise component. Non-identity compensation device of the focal plane array infrared detector, characterized in that each configuration. 제2항에 있어서, 상기 적응형 필터는 상기 기준잡음성분 추출부의 출력을 입력하고 상기 가산기의 출력을 피드백하여, FPA 데이타 저장부에서 출력되는 잡음성분으로 적응시킴을 특징으로 하는 촛점면 배열 적외선 검출기의 비동일성 보상장치.The focal plane array infrared detector of claim 2, wherein the adaptive filter inputs the output of the reference noise component extractor and feeds back the output of the adder to adapt the noise component output from the FPA data storage unit. Non-identity compensation device. 제3항에 있어서, 상기 기준잡음성분을 출력하는 화소부위에 균일한 밝기의 빛을 조사하여 기준잡음성분을 추출함을 특징으로 하는 촛점면 배열 적외선 검출기의 비동일성 보상장치.4. The apparatus of claim 3, wherein the reference noise component is extracted by irradiating light having a uniform brightness to the pixel portion outputting the reference noise component. 제4항에 있어서, 상기 제2촛점면 배열 검출기에 균일한 밝기의 빛을 조사하여 기준잡음성분을 추출함을 특징으로 하는 촛점면 배열 적외선 검출기의 비동일성 보상장치.The apparatus of claim 4, wherein a reference noise component is extracted by irradiating light of uniform brightness to the second focal plane array detector. 6. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950045835A 1995-11-30 1995-11-30 Method and apparatus for compensating non-identity of focal plane array infrared detector Expired - Fee Related KR0143935B1 (en)

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