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Atmospheric aerosols affect weather and global general circulation by modifying cloud and precipitation processes, but the magnitude of cloud adjustment by aerosols remains poorly quantified and represents the largest uncertainty in estimated forcing of climate change. Here we assess the effects of anthropogenic aerosols on the Pacific storm track, using a(More)
This paper introduces a new method for extracting salient features from surfaces that are represented by triangle meshes. Our method extracts salient geometric feature points in the Laplace–Beltrami spectral domain instead of usual spatial domains. Simultaneously, a spatial region is determined as a local support of each feature point, which is(More)
CT colonography (CTC) is a minimally invasive screening technique for colorectal polyps and colon cancer. Since electronic colon cleansing (ECC) cannot completely remove the presence of pseudo-polyps, most CTC protocols acquire both prone and supine images to improve the visualization of the lumen wall and to reduce false positives. Comparisons between the(More)
Parameterization of complex surfaces constitutes a major means of visualizing highly convoluted geometric structures as well as other properties associated with the surface. It also enables users with the ability to navigate, orient, and focus on regions of interest within a global view and overcome the occlusions to inner concavities. In this paper, we(More)
In this paper, we propose a novel area-preserving surface flattening method, which is rigorous in theory, efficient in computation, yet general in application domains. Leveraged on the state-of-the-art flattening techniques, an infinitesimal area restoring diffeomorphic flow is constructed as a Lie advection of differential 2-forms on the manifold, which(More)
—With the advance of 3D acquisition techniques, more and more 3D motion data with fine details become available. In order to efficiently represent the data, we explored different motion compensation algorithms through conventional techniques and analyzed their performance both in theory and by experiments. A novel motion compression framework based on local(More)
DEDICATION I dedicate this dissertation to my family, especially ... to my father and mother for opening my eyes to the world and instilling importance of hard work; encouragement and support; and last but not least, to my beloved nephew, Hirbod. ii ACKNOWLEDGMENTS First and foremost, I would like to thank my advisor, Dr. Jing Hua, for his continuous(More)
Lai, Zhaoqiang, "Multi-scale and multi-spectral shape analysis: from 2d to 3d" (2011). Wayne State University Dissertations. Paper 355. DEDICATION To the memories of my grandfather. ii ACKNOWLEDGMENTS First and foremost, I would like to thank my advisor, Dr. Jing Hua, for his continuous support in the Ph.D. program. Dr. Jing Hua is an excellent role model(More)