DCT계수와 천이지도 분석을 이용한 개선된 영상 내 자막영역 검출방법An Improved Method for Detecting Caption in image using DCT-coefficient and Transition-map Analysis
- Other Titles
- An Improved Method for Detecting Caption in image using DCT-coefficient and Transition-map Analysis
- Authors
- 안권재; 주성일; 김계영; 최형일
- Issue Date
- Apr-2011
- Publisher
- 한국컴퓨터정보학회
- Keywords
- Text Detection; Character Recognition; DCT; Transition map; 문자탐지; 문자인식; 이산코사인변환; 천이지도
- Citation
- 한국컴퓨터정보학회논문지, v.16, no.4, pp.63 - 74
- Journal Title
- 한국컴퓨터정보학회논문지
- Volume
- 16
- Number
- 4
- Start Page
- 63
- End Page
- 74
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/13799
- ISSN
- 1598-849X
- Abstract
- In this paper, we proposed the method for detecting text region on image using DCT-coefficient and transition-map analysis. The detecting rate of traditional method for detecting text region using DCT-coefficient analysis is high, but false positive detecting rate also is high and the method using transition-map often reject true text region in step of verification because of sticky threshold. To overcome these problems, we generated PTRmap(Promising Text Region map) through DCT-coefficient analysis and applied PTRmap to method for detecting text region using transition map. As the result, the false positive detecting rate decreased as compared with the method using DCT-coefficient analysis, and the detecting rate increased as compared with the method using transition map.
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