KR960013040A - Region Division Method of Video Signal - Google Patents

Region Division Method of Video Signal Download PDF

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Publication number
KR960013040A
KR960013040A KR1019940023311A KR19940023311A KR960013040A KR 960013040 A KR960013040 A KR 960013040A KR 1019940023311 A KR1019940023311 A KR 1019940023311A KR 19940023311 A KR19940023311 A KR 19940023311A KR 960013040 A KR960013040 A KR 960013040A
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KR
South Korea
Prior art keywords
strong edge
block
predetermined value
filtering
image
Prior art date
Application number
KR1019940023311A
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Korean (ko)
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KR0134472B1 (en
Inventor
김진헌
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배순훈
대우전자 주식회사
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Priority to KR1019940023311A priority Critical patent/KR0134472B1/en
Publication of KR960013040A publication Critical patent/KR960013040A/en
Application granted granted Critical
Publication of KR0134472B1 publication Critical patent/KR0134472B1/en

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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
    • G06T7/12—Edge-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20021—Dividing image into blocks, subimages or windows
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20024—Filtering details

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  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

영상을 효과적으로 분할하기 위하여 수행하는 전처리 과정에서 스트롱 에지가 포함된 블럭에 대해서만 나가오 필터링하는 영상신호의 영역분할 방법이 개시되는 바, 이는 입력되는 영상신호를 소정개의 서브 블럭으로 분할하는 제1스텝과. 상기 제1스텝에서 분할된 서브 블럭에 4방향 미분 연산자를 적용하여 스트롱 에지를 찾는 제2스텝과, 상기 제2스텝에서 찾은 스트롱 에지와 미리 설정된 소정 값 이상의 스트롱 에지를 비교하는 제3스텝과, 상기 제2스텝에서 찾은 스트롱 에지와 소정 값 이상의 스트롱 에지보다 크거나 같다고 판별되면 그 스트롱 에지와 포함된 블럭에 대해 나가오 필터링을 수행하고, 작다고 판별되면 그 블럭에 대해서는 나가오 필터링을 수행하지 않는 제4스텝으로 이루어짐으로써, 영상의 에지를 선명화시키고 영상의 상세한 부분도 살린다.In the pre-processing process for effectively dividing an image, a method of region division of an image signal for filtering out only a block including a strong edge is disclosed, which includes a first step of dividing an input image signal into predetermined sub-blocks; . A second step of finding a strong edge by applying a four-way differential operator to the sub-block divided in the first step, a third step of comparing the strong edge found in the second step with a strong edge of a predetermined value or more; If it is determined that the strong edge found in the second step is greater than or equal to a strong edge equal to or greater than a predetermined value, outgoing filtering is performed on the strong edge and the included block, and when it is determined to be small, a fourth outgoing filtering is not performed on the block. By the steps, the edges of the image are sharpened and the details of the image are saved.

Description

영상신호의 영역분할 방법Region Division Method of Video Signal

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

제2도는 나가오 필터링된 화소의 일실시예를 나타낸 도면.2 is a diagram illustrating an embodiment of a Nagao filtered pixel.

제3도는 본 발명에 따른 영상신호의 영역분할 방법을 수행하기 위한 흐름도.3 is a flowchart for performing a method of segmenting a video signal according to the present invention.

제4도는 상기 제3도에 적용되는 4방향 미분 연산자를 나타낸 도면.4 is a diagram showing a four-way differential operator applied to the third diagram.

Claims (2)

입력되는 영상을 소정개의 서브 블럭으로 분할하는 제1스텝과, 상기 제1스텝에서 분할된 서브 블럭에 4방향 미분 연산자를 적용하여 스트롱 에지를 찾는 제2스텝과, 상기 제2스텝에서 찾은 스트롱 에지와 미리 설정된 소정 값 이상의 스트롱 에지를 비교하는 제3스텝과, 상기 제2스텝에서 찾은 스트롱 에지가 소정 값 이상의 스트롱 에지보다 크거나 같다고 판별되면 그 스트롱 에지가 포함된 블럭에 대해 나가오 필터링을 수행하고, 작다고 판별되면 그 블럭에 대해서는 나가오 필터링을 수행하지 않는 제4스텝으로 이루어지는 영상신호 영역분할 방법.A first step of dividing an input image into a predetermined subblock, a second step of finding a strong edge by applying a four-way differential operator to the subblock divided in the first step, and a strong edge found in the second step And a third step of comparing a strong edge of a predetermined value or more to a predetermined value and a strong edge found in the second step is greater than or equal to a strong edge of a predetermined value or more, and performing outgoing filtering on a block including the strong edge. And a fourth step of not performing Nagao filtering on the block if it is determined to be small. 제1항에 있어서, 상기 제2스텝은, 4방향 미분 연산자의 최대값을 구하여 스트롱 에지를 찾음을 특징으로 하는 영상신호 영역분할 방법.The method of claim 1, wherein the second step finds a strong edge by obtaining a maximum value of a four-way differential operator. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940023311A 1994-09-15 1994-09-15 Segmentation method of the image data KR0134472B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940023311A KR0134472B1 (en) 1994-09-15 1994-09-15 Segmentation method of the image data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940023311A KR0134472B1 (en) 1994-09-15 1994-09-15 Segmentation method of the image data

Publications (2)

Publication Number Publication Date
KR960013040A true KR960013040A (en) 1996-04-20
KR0134472B1 KR0134472B1 (en) 1998-04-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940023311A KR0134472B1 (en) 1994-09-15 1994-09-15 Segmentation method of the image data

Country Status (1)

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KR (1) KR0134472B1 (en)

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KR0134472B1 (en) 1998-04-23

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