상세정보
학술대회
Hybrid Watermarking for Improving Detector Performance
- 발행일
- 200610
- 출처
- International Conference on Multimedia (MM) 2006, pp.161-164
- 협약과제
- 06MC1100, 멀티플랫폼 유통환경을 위한 콘텐츠 보호 기술 개발, 서영호
- 초록
- In this paper, we describe the adaptive hybrid watermarking scheme to improve the watermark detector's performance. In the hybrid watermarking, the conventional spatial watermarking and QIM scheme are applied simultaneously to the spatial domain of the image. According to the edge-map of the image the spatial watermarking is applied to the flat region and the QIM is applied to the high frequency region including edge and texture. The threshold between flat and edge is decided empirically and watermark blocks are embedded repeatedly into the image. In the detection process, we show how to estimate the threshold value by ACF(Auto-Correlation Function). Experimental results show the proposed hybrid watermarking estimates the watermark signal correctly than the conventional spatial watermarking.
- KSP 제안 키워드
- Edge map, High Frequency(HF), Threshold Value, auto-correlation function(ACF), detection process, detector performance, flat region, spatial domain, watermarking scheme