KR920022804A - Fade's Shedding Compensation Circuit and Method Using Close Image Sensor - Google Patents

Fade's Shedding Compensation Circuit and Method Using Close Image Sensor Download PDF

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Publication number
KR920022804A
KR920022804A KR1019910008550A KR910008550A KR920022804A KR 920022804 A KR920022804 A KR 920022804A KR 1019910008550 A KR1019910008550 A KR 1019910008550A KR 910008550 A KR910008550 A KR 910008550A KR 920022804 A KR920022804 A KR 920022804A
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South Korea
Prior art keywords
signal
image
compensation
shedding
overflow
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KR1019910008550A
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Korean (ko)
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KR930007975B1 (en
Inventor
곽두신
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정용문
삼성전자 주식회사
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Priority to KR1019910008550A priority Critical patent/KR930007975B1/en
Publication of KR920022804A publication Critical patent/KR920022804A/en
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Publication of KR930007975B1 publication Critical patent/KR930007975B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
    • H04N1/00005—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for relating to image data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/21—Intermediate information storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0077—Types of the still picture apparatus
    • H04N2201/0093—Facsimile machine

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Image Input (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

내용 없음.No content.

Description

밀착형 이미지 센서를 사용한 팩시밀리의 쉐딩 보상회로 및 방법Fade's Shedding Compensation Circuit and Method Using Close Image Sensor

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

제2도는 본 발명에 따른 쉐딩보상 회로도,2 is a shedding compensation circuit diagram according to the present invention,

제3도는 본 발명에 따른 이미지 신호에 대한 쉐딩파형도,3 is a shading waveform diagram of an image signal according to the present invention;

제4도는 본 발명에 따른 흐른도.4 is a flow diagram according to the invention.

Claims (2)

밀착형 이미지센서를 사용한 팩시밀리 시스템의 쉐딩보상회로에 있어서, 쉐딩파형 시작신호, 원고의 한라인 독취신호 제1-제2 이미지 레벨 선택신호를 발생하고 오버플로우 감지신호를 받아 후술하는 오버플로우 감지부(20)의 리세트신호를 출력하며 이미지 보상신호를 입력하여 시스템의 전반동작을 제어 처리하는 제어부(1)와, 이미지 센서(5)로부터 이미지 신호를 입력하여 상기 제어부(1)의 제1,제2이미지 레벨 선택 신호에 의해 이미지 신호의 레벨을 각각 다르게 선택 출력하기 위한 이미지 신호 레벨 선택부(4)와, 각 픽셀별 보상계수값을 저장하는 램(a)과, 상기 이미지신호 레벨 선택부(4)에서 선택된 이미지신호를 받아 쉐딩보상파형에 따른 보상계수를 발생하고 원고 독취시 상기 램(9)에 저장된 보상계수값을 기준으로 쉐딩파형을 보상하여 상기 이미지신호 레벨 선택부(4)에서 선택된 서로다른 이미지신호의 쉐딩파형을 비교하여 오버플로우 신호를 출력하는 쉐딩보상부(7)와, 상기 쉐딩보상부(7)에서 출력된 오버플로우신호를 감지하기 위한 오버플로우 감지부(2)으로 구성함을 특징으로 하는 쉐딩보상회로.In a shading compensation circuit of a facsimile system using a close-type image sensor, an overflow detection unit which generates a shedding waveform start signal, a one-line read signal of the original, and a first-second image level selection signal and receives an overflow detection signal, which will be described later. A control unit 1 which outputs the reset signal of 20 and inputs an image compensation signal to control the first half operation of the system; and inputs an image signal from the image sensor 5 to the first, An image signal level selector 4 for selectively outputting a level of an image signal differently by a second image level select signal, a RAM for storing a compensation coefficient value for each pixel, and the image signal level selector Receives the image signal selected in (4) to generate a compensation coefficient according to the shedding compensation waveform, and compensating the shedding waveform on the basis of the compensation coefficient value stored in the RAM (9) when reading the original The shading compensator 7 outputs an overflow signal by comparing the shading waveforms of different image signals selected by the unknown signal level selector 4, and the overflow signal output from the shedding compensator 7 is detected. Shading compensation circuit, characterized in that consisting of an overflow detection unit (2) for. 밀착형 이미지센서를 사용한 팩시밀리 시스템의 쉐딩보상방법에 있어서, 이미지신호의 레벨은 각각 다르게 출력시키기 위해 이미지레벨 선택신호를 발생하는 제1과정과, 상기 제1과정에서 이미지 레벨 선택신호를 발생하고 오버플로우가 발생하는가를 검색하는 제2과정과, 상기 제2과정에서 오버플로우가 발생될시 오버플로우감지부(2)를 리세트시키고 다시 제1과정으로 되돌아가는 제3과정과, 상기 제2과정에서 오버플로우가 발생되지 않을시 정상적인 쉐딩보상을 수행하는 제4과정으로 이루어짐을 특징으로 하는 쉐딩보상 방법.In the shading compensation method of a facsimile system using a close-type image sensor, a first process of generating an image level selection signal for outputting different levels of the image signal, and generating and over generating an image level selection signal in the first process. A second step of searching whether a flow occurs; a third step of resetting the overflow detection unit 2 when the overflow occurs in the second step and returning to the first step; and the second step Shading compensation method characterized in that the fourth step of performing a normal shedding compensation when the overflow does not occur. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910008550A 1991-05-25 1991-05-25 Shading compensating circuit and method KR930007975B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910008550A KR930007975B1 (en) 1991-05-25 1991-05-25 Shading compensating circuit and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910008550A KR930007975B1 (en) 1991-05-25 1991-05-25 Shading compensating circuit and method

Publications (2)

Publication Number Publication Date
KR920022804A true KR920022804A (en) 1992-12-19
KR930007975B1 KR930007975B1 (en) 1993-08-25

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KR1019910008550A KR930007975B1 (en) 1991-05-25 1991-05-25 Shading compensating circuit and method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100351965B1 (en) * 1994-10-31 2003-01-24 주식회사 하이닉스반도체 Color image array scanner having high-resolution monochrome mode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100351965B1 (en) * 1994-10-31 2003-01-24 주식회사 하이닉스반도체 Color image array scanner having high-resolution monochrome mode

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Publication number Publication date
KR930007975B1 (en) 1993-08-25

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