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In this paper, we propose a new steganalytic method to detect the message hidden in a black and white image using the steganographic technique developed by Liang, Wang and Zhang. Our detection method estimates the length of hidden message embedded in a binary image. Although the hidden message embedded is visually imperceptible, it changes some image statistic (such as inter-pixels correlation). Based...
In this paper RDFStats is introduced, which is a generator for statistics of RDF sources like SPARQL endpoints and RDF documents. RDFStats does not only provide a statistics generator, but also a powerful API for persisting and accessing statistics including several estimation functions that also support SPARQL filter-like expressions. For many Semantic Web applications like the Semantic Web Integrator...
Due to the bilinear nature of Wigner-Ville and other time-frequency distributions, they produce poor results in the presence of additive noise. Though smoothed versions of the Wigner-Ville distribution (WVD) such as smoothed pseudo Wigner-Ville distribution (SPWVD) can suppress the noise effect, they still contain considerable noise. In this paper, we introduce a novel noise suppression method for...
This paper describes the theory and design of an advanced engineering prototype of a quantile system of data compression for space telemetry. The basic idea is to transmit a few quantiles (or percentage points, as they are sometimes called) of a histogram of experimental values formed aboard a spacecraft. Only these quantiles are transmitted to Earth, and yet a large part of the information that was...
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