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A Robust Digital Watermarking Algorithm for Copyright Protection of Aerial Photogrammetric Images
Author(s) -
Hsu PaiHui,
Chen ChihCheng
Publication year - 2016
Publication title -
the photogrammetric record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 51
eISSN - 1477-9730
pISSN - 0031-868X
DOI - 10.1111/phor.12134
Subject(s) - digital watermarking , robustness (evolution) , watermark , computer science , computer vision , artificial intelligence , photogrammetry , digital image , digital image processing , digital data , image processing , image (mathematics) , data transmission , computer hardware , biochemistry , chemistry , gene
Current research on digital watermarking for the copyright protection of digital multimedia data has led to fairly advanced techniques with fruitful results. However, there remains a lack of research on digital watermarking for geospatial data, which is very costly to produce but is of great importance and with wide application. In this study an analysis and discussion of digital watermarking is carried out for digital aerial photogrammetric images. Focusing on the requirements for the main applications of such images, a feature‐based digital watermarking algorithm is proposed. Testing and analysis of the robustness of the watermark is performed to achieve the goal of copyright protection, even after image processing and geometric transformation have been undertaken on the watermarked image. Furthermore, the image quality is (almost) preserved to avoid detrimental effects on subsequent applications. The experimental results prove that the proposed watermarking method has a certain degree of robustness and can resist most types of image‐processing and geometric attacks, while maintaining the data quality of the aerial images.