KR910011482A - Inverse gamma correction circuit and correction data extraction method of video printer device - Google Patents

Inverse gamma correction circuit and correction data extraction method of video printer device Download PDF

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Publication number
KR910011482A
KR910011482A KR1019890020094A KR890020094A KR910011482A KR 910011482 A KR910011482 A KR 910011482A KR 1019890020094 A KR1019890020094 A KR 1019890020094A KR 890020094 A KR890020094 A KR 890020094A KR 910011482 A KR910011482 A KR 910011482A
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KR
South Korea
Prior art keywords
data
signal voltage
inverse gamma
gamma correction
video printer
Prior art date
Application number
KR1019890020094A
Other languages
Korean (ko)
Other versions
KR920005312B1 (en
Inventor
차동일
Original Assignee
강진구
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 강진구, 삼성전자 주식회사 filed Critical 강진구
Priority to KR1019890020094A priority Critical patent/KR920005312B1/en
Publication of KR910011482A publication Critical patent/KR910011482A/en
Application granted granted Critical
Publication of KR920005312B1 publication Critical patent/KR920005312B1/en

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06KGRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/18Conditioning data for presenting it to the physical printing elements
    • G06K15/1867Post-processing of the composed and rasterized print image
    • G06K15/1872Image enhancement
    • G06K15/1878Adjusting colours
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0271Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

내용 없음.No content.

Description

비디오 프린터 장치의 역 감마 보정회로 및 보정 데이터 추출방법Inverse gamma correction circuit and correction data extraction method of video printer device

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

제4도는 본 발명에 따른 역 감마 보정 회로도.4 is an inverse gamma correction circuit diagram in accordance with the present invention.

Claims (2)

2a계조 표현 능력을 갖는 비디오 프린터 장치에 있어서, 카메라의 아나로그 영상신호의 신호 전압을 2a×4배의 클럭으로 샘플링하여 소정 a비트의 디지탈 데이터로 변환하는 A/D변환기(30)와, 상기 A/D변환기(30)에 의하여 소정 a비트로 변환 출력되는 데이터를 소정 어드레서(ADD1)의 지정에 의하여 저장하는 화상메모리(32)와, 광량이 2a등분된 각 값이 광량의 1/2.2승에 비례하는 신호 전압을 2a×4배 취한 각각의 값을 어드레스로 하는 곳에 격납되어 있으며, 상기 화상메모리(32)로부터 출력되는 화상데이터를 어드레스로 입력하여 리니어한 데이터를 출력하는 화상데이터를 어드레스로 입력하여 리니어한 데이터를 출력하는 보정메모리(34)와, 상기 보정메모리(34)에서 출력되는 데이터를 소정 어드레스(ADD2)의 입력에 의해 저장하고 출력하는 라인메모리(36)로 구성함을 특징으로 하는 비디오 프린터 장치의 역 감마 보정회로.A video printer apparatus having a 2 a gradation representation capability, comprising : an A / D converter 30 for sampling a signal voltage of an analog video signal of a camera with a clock of 2 a x 4 times and converting the signal voltage into a predetermined a bit of digital data; And an image memory 32 for storing the data converted into a predetermined bit by the A / D converter 30 by designation of a predetermined addresser ADD1, and each value whose light quantity is equal to 2 a equals one of the light quantity. The image is stored in a location where each value obtained by taking a signal voltage proportional to the /2.2 power is 2 a × 4 times as an address, and inputs the image data output from the image memory 32 as an address to output linear data. A correction memory 34 for inputting data as an address and outputting linear data, and a line memory 36 for storing and outputting data output from the correction memory 34 by input of a predetermined address ADD2. An inverse gamma correction circuit of a video printer apparatus, characterized by comprising: 2a계조 표현 능력을 갖는 비디오 프린터 장치의 화상 데이터 역감마 보정데이터 추출방법에 있어서, 각 계조당 계조의 리니어성을 갖기 위하여 광량의 1/2.2승에 비례하는 영상 신호 전압을 2a×4배 이상 샘플링하고 상기 2a×4배 이상의 샘플링 값으로부터 2a×4배 이상의 광량을 추출하는 제1과정과, 광량을 기준으로 2a개의 기준 광량값에 상응하는 2a의 신호 전압의 크기를 추출하여 상기 2a×4배 이상의 샘플링값과 2a개의 기준 신호 전압과의 관계로부터 역감마 보정데이터를 추출하는 제2과정으로 이루어짐을 특징으로 하는 역감마 보정데이터 추출방법. A method of extracting image data inverse gamma correction data of a video printer apparatus having a 2 a gray scale expressing capability, wherein a video signal voltage proportional to 1 / 2.2 power of the light amount is 2 a × 4 times in order to have linearity of the gray scale per gray level. over sampling and extract the signal voltage on the 2 a × 4 times or more first process of extracting a 2 a × 4 or more times the amount of light from the sample value and, 2 a, which, based on the light amount corresponding to 2 a single standard light quantity value to the 2 × 4 or more times a sample value and a second reference signal voltage and the relationship of how the data from the inverse gamma correction process, the second inverse gamma correction extract data, characterized by extracting constituted by any of the. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890020094A 1989-12-29 1989-12-29 Video printers inverse gamma compensation circuit and data extraction method KR920005312B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890020094A KR920005312B1 (en) 1989-12-29 1989-12-29 Video printers inverse gamma compensation circuit and data extraction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890020094A KR920005312B1 (en) 1989-12-29 1989-12-29 Video printers inverse gamma compensation circuit and data extraction method

Publications (2)

Publication Number Publication Date
KR910011482A true KR910011482A (en) 1991-08-07
KR920005312B1 KR920005312B1 (en) 1992-07-02

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Application Number Title Priority Date Filing Date
KR1019890020094A KR920005312B1 (en) 1989-12-29 1989-12-29 Video printers inverse gamma compensation circuit and data extraction method

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KR (1) KR920005312B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100807612B1 (en) * 2005-05-13 2008-03-03 파이오니아 가부시키가이샤 Image signal processing circuit display apparatus and image signal processing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100807612B1 (en) * 2005-05-13 2008-03-03 파이오니아 가부시키가이샤 Image signal processing circuit display apparatus and image signal processing method

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Publication number Publication date
KR920005312B1 (en) 1992-07-02

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