KR960006613A - Image coding device using contour - Google Patents

Image coding device using contour Download PDF

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Publication number
KR960006613A
KR960006613A KR1019940018640A KR19940018640A KR960006613A KR 960006613 A KR960006613 A KR 960006613A KR 1019940018640 A KR1019940018640 A KR 1019940018640A KR 19940018640 A KR19940018640 A KR 19940018640A KR 960006613 A KR960006613 A KR 960006613A
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KR
South Korea
Prior art keywords
contour
outline
image
unit
information
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KR1019940018640A
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Korean (ko)
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KR0125127B1 (en
Inventor
정해묵
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배순훈
대우전자 주식회사
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Priority to KR1019940018640A priority Critical patent/KR0125127B1/en
Publication of KR960006613A publication Critical patent/KR960006613A/en
Application granted granted Critical
Publication of KR0125127B1 publication Critical patent/KR0125127B1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/20—Contour coding, e.g. using detection of edges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/136—Incoming video signal characteristics or properties

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)

Abstract

본 발명에 의한 윤곽선을 이용한 화상 부호화장치에서는 하나의 폐쇄 윤곽을 임의의 그레이 레벨로 메꾸어서 화상을 복원할 때 두 세그먼트의 그레이 레벨을 비교하여 그레이 레벨이 급격이 변하는 부분은 저역통과필터링을 하지 않고, 그렇지 않은 부분은 저역통과필터링을 함으로서 그레이 레벨의 차이로 인해 윤곽선 경계에서 발생하는 허위윤곽을 감소시킨 것이다.In the picture coding apparatus using the contour according to the present invention, when one image is reconstructed by filling one closed outline to an arbitrary gray level, the gray level of the two segments is rapidly changed by comparing the gray levels of the two segments without low pass filtering. The low-pass filtering reduces the false contours that occur at the contour boundary due to the difference in gray levels.

Description

윤곽선을 이용한 화상 부호화장치Image coding device using contour

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

Claims (5)

윤곽선 정보를 이용하여 원화상의 윤곽선화상을 구성하기 위한 윤곽선 구축부; 상기 윤곽선 구축부에 구축된 윤곽선 화상을 내용정보를 이용하여 충전하기 위한 윤곽선 충전부; 상기 윤곽선 충전부에서 출력되는 디코딩된 화상을 저역통과필터링하기 위한 저역통과필터; 상기 윤곽선 충전부에서 출력되는 디코딩된 화상의 국부분산을 상기 윤곽선 정보를 이용하여 구한 다음 소정의 문턱치와 비교하고, 그 결과를 선택신호로 출력하기 위한 분산계산 및 비교부; 및 상기 분산계산 및 비교부에서 출력되는 선택신호에 따라 상기 윤곽선 충전부에서 출력되는 화상과 상기 저역통과필터에서 출력되는 화상을 선택적으로 출력하기 위한 절환부로 이루어진 윤곽선을 이용한 화상 부호화장치.An outline construction unit for constructing an outline image of the original image using the outline information; An outline charging unit for charging an outline image constructed in the outline construction unit using content information; A low pass filter for low pass filtering the decoded image output from the contour filling unit; A dispersion calculator for comparing the local partial calculation of the decoded image output from the contour charging unit with the contour information, comparing the predetermined threshold with a predetermined threshold, and outputting the result as a selection signal; And a switching unit for selectively outputting the image output from the contour filling unit and the image output from the low pass filter according to the selection signal output from the dispersion calculation and comparison unit. 제1항에 있어서, 상기 분산계산 및 비교부는 상기 윤곽선 충전부에서 출력되는 디코딩된 화상의 국구분산을 상기 윤곽선 정보를 이용하여 구하기 위한 국부분산 계산부와, 이 국부분산 계산부에서 구한 국부분산을 소정의 문턱치와 비교하기 위한 비교기와, 이 비교기의 출력신호와 소정의 마스킹정보에 대하여 논리곱을 수행하기 위한 앤드게이트로 구성된 것을 특징으로 하는 윤곽선을 이용한 화상 부호화장치.2. The apparatus of claim 1, wherein the variance calculator and comparer calculates a local variance of the decoded image output from the contour filler using the contour information, and a local partial calculator obtained by the local partial calculator. And a comparator for performing comparison with a threshold value of the comparator and an AND gate for performing a logical product on the output signal of the comparator and predetermined masking information. 제1항에 있어서, 상기 절환부는 상기 국부분산이 문턱치보다 작고, 상기 마스킹정보가 '하이'논리상태일 경우에만 상기 저역통과필터에서 출력되는 화상을 출력하는 것을 특징으로 하는 윤곽선을 이용한 화상 부호화장치.The image encoding apparatus according to claim 1, wherein the switching unit outputs an image output from the low pass filter only when the local partial acid is smaller than a threshold and the masking information is in a 'high' logic state. . 제3항에 있어서, 상기 마스킹정보는 윤곽선 픽셀이 n×n 화소단위의 중앙에 위치하는 경우에만 '하이'논리레벨을 출력하는 것을 특징으로 하는 윤곽선을 이용한 화상 부호화장치.The image encoding apparatus according to claim 3, wherein the masking information outputs a 'high' logic level only when the contour pixel is located at the center of n × n pixel units. 제3항에 있어서, 상기 마스킹정보는 윤곽선 픽셀이 n×n 화소단위의 중앙이 아닌 주변에 위치하는 경우에만 '하이'논리레벨을 출력하는 것을 특징으로 하는 윤곽선을 이용한 화상 부호화장치.4. The image encoding apparatus according to claim 3, wherein the masking information outputs a 'high' logic level only when the contour pixel is located at the periphery instead of the center of n × n pixel units. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940018640A 1994-07-29 1994-07-29 Image encoder using contour KR0125127B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940018640A KR0125127B1 (en) 1994-07-29 1994-07-29 Image encoder using contour

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940018640A KR0125127B1 (en) 1994-07-29 1994-07-29 Image encoder using contour

Publications (2)

Publication Number Publication Date
KR960006613A true KR960006613A (en) 1996-02-23
KR0125127B1 KR0125127B1 (en) 1997-12-01

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