김회율
2018-04-19T08:18:09Z
2018-04-19T08:18:09Z
2012-03
방송공학회논문지, 2012, 17, P.316-324(9)
1226-7953
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE01822933
https://repository.hanyang.ac.kr/handle/20.500.11754/69528
In this paper, a novel descreening method using HOG(histogram of gradient)-based adaptive smoothing filter is proposed. Conventional edge-oriented smoothing methods does not provide enough smoothing to the halftone image due to the edge-like characteristic of the halftone noise. Moreover, clustered-dot halftoning method, which is commonly used in printing tends to create Moire pattern because of the intereference in color channels. Therefore, the proposed method uses HOG to distinguish edges and the amount of smoothing to be performed on the halftone image is then calculated according to the magnitude of the HOG in the edge and edge normal orientation. The proposed method was tested on various scanned halftone materials, and the results show that it effectively removes halftone noises as well as Moire pattern while preserving image details.
ko_KR
한국방송미디어공학회
descreening
halftoning
Moire pattern
adaptive smoothing
histogram of oriented gradients
HOG 기반의 적응적 평활화를 이용한 스캔된 영상의 하프톤 잡음 제거
Halftone Noise Removal in Scanned Images using HOG based Adaptive Smoothing Filter
Article
2
17
316-324
방송공학회 논문지
허규성
백열민
김회율
2012216378
S
COLLEGE OF ENGINEERING[S]
DEPARTMENT OF ELECTRONIC ENGINEERING
wykim