KR970057725A - Digital Video Quality Enhancement Device - Google Patents

Digital Video Quality Enhancement Device Download PDF

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Publication number
KR970057725A
KR970057725A KR1019950046902A KR19950046902A KR970057725A KR 970057725 A KR970057725 A KR 970057725A KR 1019950046902 A KR1019950046902 A KR 1019950046902A KR 19950046902 A KR19950046902 A KR 19950046902A KR 970057725 A KR970057725 A KR 970057725A
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KR
South Korea
Prior art keywords
image quality
window
contrast
value
pixel
Prior art date
Application number
KR1019950046902A
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Korean (ko)
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KR100219595B1 (en
Inventor
이재준
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950046902A priority Critical patent/KR100219595B1/en
Publication of KR970057725A publication Critical patent/KR970057725A/en
Application granted granted Critical
Publication of KR100219595B1 publication Critical patent/KR100219595B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Image Processing (AREA)

Abstract

본 발명은 디지탈영상 화질개선장치에 관한 것으로서, 명암대비를 증가시키고자 하는 화소에 N×N(여기서 N은 자연수) 윈도우의 중심이 오게 하여 윈도우내의 평균과 분산을 계산하기 위한 부분평균 및 부분분산 계산부, 계산된 분산과 영상특성을 나타내는 상수에 의해 k값을 계산하기 위한 k값 계산부와, 산출된 k값과 N×N 윈도우의 화소평균을 이용하여 해당 화소의 명암대비를 증가시키기 위한 명암대비 개선부로 구성된다. 따라서, 영상의 국부적인 특성을 구한 후 이를 이용하여 국부적으로 화질개선에 적합한 처리를 행해 주므로 화질개선처리로 인한 화질의 열화를 초래하지 않고서 영상전체에 걸쳐 화질을 개선시킬 수 있다.The present invention relates to a digital image quality improving device, wherein a pixel of which a contrast is to be increased has a center of an N × N (where N is a natural number) window so that a partial mean and partial dispersion for calculating an average and a variance in the window are provided. A calculation unit, a k-value calculation unit for calculating a k value by a constant representing a calculated variance and image characteristics, and an increase in contrast of the corresponding pixel using the calculated k value and the pixel average of the N × N window Consist of the contrast part. Therefore, since the local characteristics of the image are obtained and processed according to the image quality improvement locally, the image quality can be improved throughout the image without incurring deterioration of the image quality due to the image quality improvement process.

Description

디지탈영상 화질개선장치Digital Video Quality Enhancement Device

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

제3도는 본 발명에 의한 디지탈영상 화질개선장치를 나타낸 블럭도.3 is a block diagram showing a digital image quality improving apparatus according to the present invention.

Claims (1)

명암대비를 증가시키고자 하는 화소에 N×N(여기서 N은 자연수)윈도우의 중심이 오게 하여 상기 윈도우내의 평균과 분산을 계산하기 위한 평균 및 분산 계산부;An average and variance calculation unit for calculating an average and a variance in the window by placing a center of an N × N (where N is a natural number) window at a pixel to increase contrast; 상기 계산된 분산과 영상특성을 나타내는 상수에 의해 k값을 계산하기 위한 k값 계산부; 및A k value calculator for calculating a k value by a constant representing the calculated dispersion and image characteristics; And 상기 산출된 k값과 상기 N×N 윈도우의 화소평균을 이용하여 해당 화소의 명암대비를 증가시키기 위한 명암대비 개선부를 포함하는 것을 특징으로 하는 디지탈영상 화질개선장치.And a contrast enhancement unit for increasing the contrast of the corresponding pixel by using the calculated k value and the pixel average of the N × N window. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950046902A 1995-12-05 1995-12-05 Digital image quality developing device KR100219595B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950046902A KR100219595B1 (en) 1995-12-05 1995-12-05 Digital image quality developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950046902A KR100219595B1 (en) 1995-12-05 1995-12-05 Digital image quality developing device

Publications (2)

Publication Number Publication Date
KR970057725A true KR970057725A (en) 1997-07-31
KR100219595B1 KR100219595B1 (en) 1999-09-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950046902A KR100219595B1 (en) 1995-12-05 1995-12-05 Digital image quality developing device

Country Status (1)

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KR (1) KR100219595B1 (en)

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KR100219595B1 (en) 1999-09-01

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