KR960006616A - Boundary Detection Method and Device - Google Patents

Boundary Detection Method and Device Download PDF

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Publication number
KR960006616A
KR960006616A KR1019940018643A KR19940018643A KR960006616A KR 960006616 A KR960006616 A KR 960006616A KR 1019940018643 A KR1019940018643 A KR 1019940018643A KR 19940018643 A KR19940018643 A KR 19940018643A KR 960006616 A KR960006616 A KR 960006616A
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South Korea
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gray level
pixel
threshold value
providing
difference
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KR1019940018643A
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Korean (ko)
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KR0141308B1 (en
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정해묵
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배순훈
대우전자 주식회사
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/136—Segmentation; Edge detection involving thresholding
    • 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
    • H04N19/20—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding

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  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Analysis (AREA)

Abstract

본 경계검출방법 및 장치는 영상부호화시스템에 있어서, 화소의 그레이레벨에 따라 경계영역을 검출하는 임계값을 가변시킴으로써, 화소의 그레이레벨에 따라 적응적으로 경계영역을 검출하기 위한 것이다. 이를 위하여 본 경계검출방법은 현재 인가되는 화소의 그레이레벨과 인접한 화소의 그레이레벨간의 차이를 계산하는 과정; 현재 인가되는 화소의 그레이레벨이 해당되는 범위를 판단하는 과정; 범위판단과정에서 판단된 결과에 따라 대응되는 소정의 임계값을 제공하는 과정; 임계값 제공과정에서 제공된 임계값을 기준으로 상기 차이계산과정에서 계산된 차이값을 비교하여 상기 현재 인가되는 화소가 경계영역에 해당되는 지를 판단하는 과정을 포함하여 수행한다.The boundary detection method and apparatus are for adaptively detecting the boundary region according to the gray level of the pixel by varying the threshold value for detecting the boundary region according to the gray level of the pixel in the image encoding system. To this end, the boundary detection method includes the steps of calculating a difference between the gray level of the currently applied pixel and the gray level of an adjacent pixel; Determining a range in which the gray level of the currently applied pixel corresponds; Providing a predetermined threshold value according to the result determined in the range determination process; And comparing the difference value calculated in the difference calculation process based on the threshold value provided in the threshold value providing process to determine whether the currently applied pixel corresponds to the boundary region.

Description

경계검출방법 및 장치Boundary Detection Method and Device

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

제1도는 종래의 경계검출장치의 개략도.1 is a schematic diagram of a conventional boundary detection device.

제2도는 본 발명에 따른 경계검출장치의 블럭도.2 is a block diagram of a boundary detection device according to the present invention.

제3도는 본 발명에 따른 그레이레벨과 임계값간의 관계도.3 is a relationship diagram between a gray level and a threshold value according to the present invention.

Claims (6)

각 화소의 그레이레벨을 이용하여 경계영역을 검출하기 위한 경계영역 검출방법에 있어서, 현재 인가되는 화소의 그레이레벨과 상기 화소에 인접한 화소의 그레이레벨간의 차이를 계산하는 과정; 상기 현재 인가되는 화소의 그레이레벨이 해당되는 범위를 판단하는 과정; 상기 범위판단과정에서 판단된 결과에 따라 대응되는 소정의 임계값을 제공하는 과정; 상기 임계값 제공과정에서 제공된 임계값을 기준으로 상기 차이계산과정에서 계산된 차이값을 비교하여 상기 현재 인가되는 화소가 경계영역에 해당되는 지를 판단하는 과정을 포함함을 특징으로 하는 경계선검출방법.A boundary area detection method for detecting a boundary area using gray levels of each pixel, the method comprising: calculating a difference between a gray level of a currently applied pixel and a gray level of a pixel adjacent to the pixel; Determining a range corresponding to a gray level of the currently applied pixel; Providing a predetermined threshold corresponding to a result determined in the range determination process; And comparing the difference value calculated in the difference calculation process based on the threshold value provided in the threshold value providing process to determine whether the currently applied pixel corresponds to a boundary area. 제1항에 있어서, 상기 임계값 제공과정은 상기 범위판단과정에서 판단한 결과 상기 화소의 그레이레벨이 낮거나 높은 범위에 해당되는 경우에는 상기 그레이레벨에 대하여 세분화된 임계값을 제공함을 특징으로 하는 경계영역 검출방법.The boundary of claim 1, wherein the threshold value providing process provides a subdivided threshold value for the gray level when the gray level of the pixel corresponds to a low or high range as determined in the range determination process. Area detection method. 제2항에 있어서, 상기 임계값 제공과정은 상기 그레이레벨값이 낮거나 높은 범위에서는 상기 그레이레벨에 대하여 선형적인 특성을 갖는 임계값을 제공함을 특징으로 하는 경계선 검출방법.The boundary line detection method according to claim 2, wherein the threshold value providing process provides a threshold having a linear characteristic with respect to the gray level when the gray level value is low or high. 각 화소의 그레이레벨을 이용하여 경계영역을 검출하기 위한 경계영역 검출장치에 있어서; 기준이 되는 화소의 그레이레벨과 상기 화소에 인접되어 있는 화소의 그레이레벨간의 차를 계산하기 위한 차이계산수단; 상기 차이계산수단에서 계산된 차값과 소정의 임계값을 비교하여 상기 기준이 되는 화소가 경계영역에 해당되는 지를 판단하는 경계영역 판단수단; 상기 기준이 되는 화소의 그레이레벨에 따라 상기 경계영역 판단수단의 상기 임게값을 가변적으로 제공하기 위한 임계값 제공수단을 포함함을 특징으로 하는 경계검출장치.A border area detection device for detecting a border area by using gray levels of each pixel; Difference calculating means for calculating a difference between the gray level of the pixel serving as a reference and the gray level of the pixel adjacent to the pixel; Boundary area determination means for comparing the difference value calculated by the difference calculation means with a predetermined threshold value to determine whether the pixel as the reference corresponds to the boundary area; And threshold value providing means for variably providing the threshold value of the boundary area determining means in accordance with the gray level of the pixel as the reference. 제4항에 있어서, 상기 임계값 제공수단을 상기 기준이 되는 화소의 그레이레벨이 해당되는 범위를 판단하기 위한 범위판단부, 상기 범위파단부의 판단결과 상기 화소의 그레이레벨이 낮거나 높은 범위에 해당되는 경우에는 상기 그레이레벨에 대하여 세분화된 임계값을 제공하는 임계값 제공부를 포함함을 특징으로 하는 경계검출장치.The display apparatus according to claim 4, wherein the threshold value providing means determines a range in which the gray level of the pixel as the reference corresponds, and the gray level of the pixel corresponds to a low or high range as a result of the determination of the range breaker. And a threshold value providing unit for providing a subdivided threshold value for the gray level. 제5항에 있어서, 상기 임계값 제공부는 상기 그레이레벨이 낮거나 높은 범위에 해당되는 경우에는 상기 그레이레벨에 대하여 선형적인 특성을 갖는 임계값을 제공함을 특징으로 하는 경계검출장치.6. The boundary detection apparatus according to claim 5, wherein the threshold providing unit provides a threshold having a linear characteristic with respect to the gray level when the gray level falls within a low or high range. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940018643A 1994-07-29 1994-07-29 Method for detection the contour and device thereof KR0141308B1 (en)

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KR1019940018643A KR0141308B1 (en) 1994-07-29 1994-07-29 Method for detection the contour and device thereof

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KR0141308B1 KR0141308B1 (en) 1998-06-15

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100602149B1 (en) * 1999-07-07 2006-07-19 엘지전자 주식회사 Method of image compression for video decoding based on motion compensation
KR20160082105A (en) 2014-12-30 2016-07-08 롯데알미늄 주식회사 Cold Showcase
KR20160081147A (en) 2014-12-30 2016-07-08 롯데알미늄 주식회사 Cold Showcase
KR20160082106A (en) 2014-12-30 2016-07-08 롯데알미늄 주식회사 Cold Showcase
KR20190086274A (en) * 2018-01-12 2019-07-22 한국기계연구원 Particle analysis method for composite, particle dispersion analysis method for composite and particle dispersion analysis system for composite
KR20220046519A (en) * 2019-06-12 2022-04-14 베이하이 에이치케이씨 옵토일렉트로닉스 테크놀로지 컴퍼니 리미티드 Text boundary processing method, display panel and computer readable storage medium

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100658349B1 (en) * 2005-08-23 2006-12-15 엘지전자 주식회사 Display apparatus and image processing method thereof
KR101582800B1 (en) * 2014-09-02 2016-01-19 재단법인 실감교류인체감응솔루션연구단 Method for detecting edge in color image adaptively and apparatus and computer-readable recording media using the same
WO2024049196A1 (en) * 2022-08-31 2024-03-07 주식회사 엘지에너지솔루션 Boundary line detection device and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100602149B1 (en) * 1999-07-07 2006-07-19 엘지전자 주식회사 Method of image compression for video decoding based on motion compensation
KR20160082105A (en) 2014-12-30 2016-07-08 롯데알미늄 주식회사 Cold Showcase
KR20160081147A (en) 2014-12-30 2016-07-08 롯데알미늄 주식회사 Cold Showcase
KR20160082106A (en) 2014-12-30 2016-07-08 롯데알미늄 주식회사 Cold Showcase
KR20190086274A (en) * 2018-01-12 2019-07-22 한국기계연구원 Particle analysis method for composite, particle dispersion analysis method for composite and particle dispersion analysis system for composite
KR20220046519A (en) * 2019-06-12 2022-04-14 베이하이 에이치케이씨 옵토일렉트로닉스 테크놀로지 컴퍼니 리미티드 Text boundary processing method, display panel and computer readable storage medium

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