Abstract
Our modular approach to data hiding is an innovative conceptin the data hiding research field. It enables the creation of modular digitalwatermarking methods that have extendable features and are designed foruse in web applications. The methods consist of two types of modules – abasic module and an application-specific module. The basic module mainlyprovides features which are connected with the specific image format. As JPEG is a preferred image format on the Internet, we have put a focuson the achievement of a robust and error-free embedding and retrieval ofthe embedded data in JPEG images. The application-specific modules areadaptable to user requirements in the concrete web application. The experimental results of the modular data watermarking are very promising. They indicate excellent image quality, satisfactory size of the embedded data andperfect robustness against JPEG transformations with prespecified compression ratios.ACM Computing Classification System (1998): C.2.0.
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