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Recent research shows that lip shape and lip movement contain abundant identity-related information and can be used as a new kind of biometrics in speaker identification or authentication. In this paper, we propose a new lip feature representation for lip biometrics which is able to describe the static and dynamic characteristics of a lip sequence. The new representation captures both the physiological...
This paper presents a new visual speaker authentication scheme which can extract the most representative details of a speaker's lip feature. For each speaker, the entire utterance pronouncing a specific prompt text is divided into several word-level segments and a mute segment. Three kinds of lip feature details are investigated including: i) lip movements in each word segment; ii) lip movements in...
Image splicing detection has attracted more and more attention with the development of powerful image modification and manipulation tools. It has been proved that some statistics of block DCT coefficients contain useful information for image splicing detection. However, how to evaluate the discriminative power of different feature sets using the block DCT coefficients and how to provide the optimum...
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