KR950004903A - Gamma Correction Circuit - Google Patents

Gamma Correction Circuit Download PDF

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Publication number
KR950004903A
KR950004903A KR1019930013568A KR930013568A KR950004903A KR 950004903 A KR950004903 A KR 950004903A KR 1019930013568 A KR1019930013568 A KR 1019930013568A KR 930013568 A KR930013568 A KR 930013568A KR 950004903 A KR950004903 A KR 950004903A
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KR
South Korea
Prior art keywords
color
signal
gamma
gamma correction
color difference
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Application number
KR1019930013568A
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Korean (ko)
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KR0132875B1 (en
Inventor
김성훈
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김광호
삼성전자 주식회사
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Priority to KR1019930013568A priority Critical patent/KR0132875B1/en
Publication of KR950004903A publication Critical patent/KR950004903A/en
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Publication of KR0132875B1 publication Critical patent/KR0132875B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/202—Gamma control

Abstract

보색필터를 채택한 단판식 비디오카메라의 감마보정회로가 개시된다.A gamma correction circuit of a single-plate video camera employing a complementary color filter is disclosed.

보색필터를 갖는 고체촬상소자와 고체촬상소자에서 발생된 신호(S1,S2)를 처리하여 색선순차신호를 발생하는 상관이중 샘플링기를 갖는 카메라에 있어서, 색선순차신호로부터 휘도신호를 추출하는 휘도신호추출기; 휘도신호추출기를 통하여 추출된 휘도신호에 대하여 감마보정을 행하는 제1감마보정기, 색선순차신호에 대하여 감마보정을 행하는 제2감마보정기; 제2감마보정기를 통하여 감마보정된 색선순차신호로부터 색차신호를 추출하는 색차신호추출기; 제1감마보정기를 통하여 감마보정된 휘도신호와 색차신호추출기를 통하여 추출된 색차신호를 합성하는 혼합기를 포함한다.A camera having a solid state image pickup device having a complementary color filter and a correlated double sampler that processes the signals S1 and S2 generated from the solid state image pickup device to generate color sequence signals, wherein the luminance signal extracts a luminance signal from the color sequence sequence signals. Extractor; A first gamma corrector for performing gamma correction on the luminance signal extracted by the luminance signal extractor, and a second gamma corrector for performing gamma correction on the color line sequential signal; A color difference signal extractor for extracting a color difference signal from the gamma-corrected color sequence signal through a second gamma corrector; And a mixer for synthesizing the luminance signal gamma corrected through the first gamma corrector and the color difference signal extracted through the color difference signal extractor.

본 발명에 따른 감마보정회로는 색선순차신호로부터 휘도신호와 색차신호를 추출하고 각각에 대하여 감마보정을 행하고 그 결과를 합성함으로써 종래의 원색색신호에 대한 감마보정회로에 비하여 간단한 구성을 갖는 효과를 갖는다.The gamma correction circuit according to the present invention has the effect of having a simpler structure than the conventional gamma correction circuit for the primary color signal by extracting the luminance signal and the color difference signal from the color line sequence signal, performing gamma correction on each of them, and synthesizing the results. .

Description

감마보정회로Gamma Correction Circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 감마보정회로의 바람직한 실시예를 보이는 블럭도, 제2도는 제1도에 도시된 색차신호검출기를 상세히 보이는 블럭도, 제3a-제3c도는 색선순차신호 및 잘못된 감마보정을 보이는 특성도.1 is a block diagram showing a preferred embodiment of a gamma correction circuit according to the present invention, FIG. 2 is a block diagram showing in detail the color difference signal detector shown in FIG. 1, and FIGS. 3a to 3c are color sequence signals and wrong gamma correction. Also shows characteristics.

Claims (3)

보색필터를 갖는 고체촬상소자와 상기 고체촬상소자에서 발생된 신호(S1,S2)를 처리하여 색선순차신호를발생하는 상관이중샘플링기를 갖는 카메라에 있어서, 상기 색선순차신호로부터 휘도신호를 추출하는 휘도신호추출기; 상기 휘도신호추출기를 통하여 추출된 휘도신호에 대하여 감마보정을 행하는 제1감마보정기; 상기 색선순차신호에 대하여감마보정을 행하는 제2감마보정기; 상기 제2감마보정기를 통하여 감마보정된 색선순차신호로부터 색차신호를 추출하는 색차신호추출기; 상기 제1감마보정기를 통하여 감마보정된 휘도신호와 상기 색차신호추출기를 통하여 추출된 색차신호를 합성하는 혼합기를 포함함을 특징으로 하는 감마보정회로.A camera having a solid state image pickup device having a complementary color filter and a correlated double sampler for processing the signals S1 and S2 generated by the solid state image pickup device to generate a color line sequence signal, wherein the luminance is extracted from the color line sequence signal. Signal extractor; A first gamma corrector for performing gamma correction on the luminance signal extracted through the luminance signal extractor; A second gamma corrector for performing gamma correction on the color sequence signal; A color difference signal extractor extracting a color difference signal from a gamma-corrected color sequence signal through the second gamma corrector; And a mixer for synthesizing the luminance signal gamma corrected through the first gamma corrector and the color difference signal extracted through the color difference signal extractor. 제1항에 있어서, 상기 휘도신호추출기는 상기 색선순차 신호의 샘플링주차수를 차단주파수로 하는 저역통과 여파기인 것을 특징으로 하는 감마보정회로.The gamma correction circuit according to claim 1, wherein the luminance signal extractor is a low pass filter whose sampling frequency is the cutoff frequency of the color line sequence signal. 제1항에 있어서, 상기 색차신호추출기는 상기 색차신호를 처리하며 상기 색선순차신호의 샘플링주파수를중심주파수로 하는 대역통과여파기를 더 구비하는 것을 특징으로 하는 감마보정회로.The gamma correction circuit of claim 1, wherein the color difference signal extractor further comprises a band pass filter for processing the color difference signal and using a sampling frequency of the color sequence signal as a center frequency. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930013568A 1993-07-19 1993-07-19 A gamma correction circuit KR0132875B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930013568A KR0132875B1 (en) 1993-07-19 1993-07-19 A gamma correction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930013568A KR0132875B1 (en) 1993-07-19 1993-07-19 A gamma correction circuit

Publications (2)

Publication Number Publication Date
KR950004903A true KR950004903A (en) 1995-02-18
KR0132875B1 KR0132875B1 (en) 1998-04-16

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Application Number Title Priority Date Filing Date
KR1019930013568A KR0132875B1 (en) 1993-07-19 1993-07-19 A gamma correction circuit

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KR0132875B1 (en) 1998-04-16

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