Qiu-yu Zhang

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According to the situation that traditional speech authentication algorithms are not appropriated for the present speech communication, we proposed a speech authentication algorithm of perceptual hashing which is based on linear forecast analysis (LPC), it can satisfy the requirement of the efficiency and the robustness for the speech authentication.(More)
considering the deficiency of accurate hand gesture contour inaccessible and inefficiency in complex dynamic background in existing methods of hand gesture tracking, a two dimensional skin color probability forecast method is proposed. Based on this, a hand gesture segmentation method of multi-mode and a hand gesture tracking method of state estimation are(More)
The effect of spam filtering method based on statistics is not good enough in filtering the new-type spam with synonymous substitution and camouflage, because the method based on statistics ignores the semantic relation between words in the text, and only judges from the word itself. So, a method of spam filtering based on the semantic body is proposed in(More)
A novel probability model is presented using the probability-based method of moving information selection together with the skin color probability distribution image. After the division of the images, the moving information is obtained by the use of the statistical frame difference method. In order to locate the accurate location of the hand position, the(More)
In the process of vision-based hand gesture human­computer interaction, to extract the motion hand gesture accurately and quickly is the premise and key of improving recognition hand gesture's speed and accuracy. This article presents a method of a new dynamic hand gesture modeling and real-time extraction for hand gesture feature, combining the(More)
Email’s text is the main body of an Email. Its content is reflected by semantic body formed by a large number of semantic elements. This paper takes the advantage of HowNet in analysis of semantic element and analyzes semantic bodies in email text, then proposes the method of constructing semantic body and the calculation ways of similarity between(More)
Current research on speech content identification aim primarily at raw wideband speech signals, which are generally transmitted in a compressed format. This makes it unable to meet the demand of speech content identification in compressed domain. This paper proposes a new speech perceptual hashing algorithm for speech content identification with compressed(More)
In this study, we propose a dither modulation audio watermarking algorithm based on human auditory system which applied the theory of dither modulation. The algorithm made the two-value image watermarking to one-dimensional digital sequence firstly and used the Fibonacci to transform one-dimensional digital sequence. Then divide the audio into audio data(More)
Combined with the linear prediction-minimum mean squared error (LP-MMSE), an efficient perceptual hashing algorithm based on improved spectral entropy for speech authentication was proposed in this paper. The linear prediction analysis is conducted on speech signal after preprocessing, framing and adding windows, and obtained the minimum mean squared error(More)
Aiming at the influence of joints or part structures deformations on the accuracy of gesture recognition in representing, and large amount of calculation with shape matching directly, a method based on innerdistance contour point distribution features (IDCPDF) and histogram matching is proposed in this paper. Firstly, elliptical skin model is used to(More)
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