Daniela Stanescu

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To achieve the copyright protection in digital images, watermarking is identified as a major technology to protect digital images from illegal manipulation and geometric distortions. In this paper we discuss a digital image watermarking algorithm based on Discrete Wavelet Transform – Discrete Cosine Transform –Singular Value Decomposition (DWT-DCT-SVD).(More)
Digital systems are becoming more and more present in civil environments from private homes to industrial plants. This is why autonomous digital monitoring and control equipments have encountered an increasingly demand in industrial and domestic fields of activity. Application scenarios requiring reliable and convenient solutions for remote interaction with(More)
The transmission of streaming data, because of its real-time nature, is subject to bandwidth constraints. We propose a MPEG-2 compliant decoder which uses data hiding to transmit additional data with no extra bandwidth while creating an almost imperceptible degradation of the picture. The additional data can be anything from subtitles to correction signals(More)
Digital watermarking is a very common technique used against illicit copying and distribution of copyright material. This paper presents improved methods for information hiding. We propose a new approach, based on the decorrelation property of the Karhunen-Loeve transform (KLT).
Steganography is a science dealing with writing hidden messages in a specific way that only the sender and the intended recipient are able to decipher. Important domains, besides classic computing, where steganography can be applied are domains using mobile and embedded devices. This paper focuses on the implementation of a steganographic algorithm on(More)
Steganography is a science that focuses on hiding specific messages using specialized techniques in such a way as only the sender and the intended receiver are able to decipher it, as well as knowing of its existence. Important domains, besides classic computing, where steganography can be applied are domains using mobile and embedded devices especially(More)
In a ubiquitous environment, intellignet functions are embedded in objects around the user, thus enabling him to create variuos functionalities by combining those objects. The collaborative robotic environments are a new approach to the coordination of multirobot systems which usually consist of numerous, relatively simple, small sized robots. The CORE-TX(More)
Steganography is a science that focuses on concealing messages using specialized techniques so that only the sender and receiver know of the message's existence and are able to decipher it. In this paper, we aim to present a new steganographic technique based on the Karhunen-Loève Transform we have entitled SCSA (Segment Compression Steganographic(More)
Digital watermarking is a technique used against illicit distribution of copyrighted material. In this paper we present steganographic techniques for watermarking, with an emphasis on robustness and bit-rate. Robustness is achieved using an optimal transform, and bit-rate is achieved by properly preprocessing the watermark signal.