지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.10
- 수록면
- 298 - 308 (11page)
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초록· 키워드
오류제보하기
Digital watermarking is a modern technology evolved to prevent illegal copy or reproduction of digital content. In recent years, several digital watermarking techniques have been presented based on discrete cosine transform, discrete wavelet transform and discrete Fourier transform. In this paper, we propose a robust and efficient digital image watermarking algorithm based on Hadamard transform. This algorithm can embed or hide an entire image or pattern, such as a company’s logo or trademark, as a watermark directly into original image for copyright protection. In proposed scheme, a best-first search technique is used to find the longest increasing sequence in each block of an image in which to embed the watermark. The experimental results show that the proposed algorithm offers better image quality and more robustness under various alterations, such as JPEG compression, cropping, sharpening and filtering among others. The results have proved the higher imperceptibility and robustness of this scheme when compared with other available watermarking techniques.
목차
Abstract
Introduction
Related Work
Hadamard Transform
Search Technique and Longest Sequence
Proposed Watermarking Method
Experimental Results and Analysis
Conclusion
References
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UCI(KEPA) : I410-ECN-0101-2015-500-002466584