Zhenquan Zhuang

Learn More
A motion compensated lifting (MCLIFT) framework is proposed for the 3D wavelet video coder. By using bi-directional motion compensation in each lifting step of the temporal direction, the video frames are effectively de-correlated. With proper entropy coding and bitstream packaging schemes, the MCLIFT wavelet video coder can be scalable in frame rate and(More)
This paper presents an advanced motion threading technique for improved performance in 3D wavelet coding. First, we extend an original motion threading idea of ours to a lifting-based implementation. Methods for processing many-to-one pixel mapping and non-referred pixels and for enabling fractional-pixel alignment in motion threading are proposed to reduce(More)
This paper proposes an advanced motion-threading technique to improve the coding efficiency of the 3D wave-let coding. We extend the original motion-threading technique to the lifting wavelet structure. This extension solves the artificial motion thread truncation problem in long support temporal wavelet filtering, and enables the accuracy of motion(More)
A new Estimation of Distribution Algorithm(EDA) based-on Gaussian Mixture Model (GMM) is proposed, in which boosting, an efficient ensemble learning method, is adopted to estimate GMM. By boosting simple GMM with two components, it has the ability of learning the model structure and parameters automatically without any requirement for prior knowledge.(More)
Iris recognition using complex valued 2D Gabor filters received a great success in broad applications. Such method encoded the iris phase information which was extracted according to the complex valued 2D filters' response. In this paper, we theoretically analyzed the complex-valued 2D Gabor filters. Based on analysis, we concluded that the real part of(More)