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Protecting location privacy of mobile systems is important for various location-based services in pervasive computing scenarios. How to quickly compute the target user's location without knowing each anchor user's location has drawn much attention. Under the classical nonadjacent subtraction based localization model, existing solutions based on homomophic encryption introduce much computation and...
This paper proposes a new strategy to promote the robustness of structure from motion algorithm from uncalibrated video sequences. First, an augmented affine factorization algorithm is formulated to circumvent the difficulty in image registration with noise and outliers contaminated data. Then, an alternative weighted factorization scheme is designed to handle the missing data and measurement uncertainties...
The paper focuses on robust 3D structure from motion of nonrigid objects from uncalibrated image sequences. A new affine factorization algorithm is first proposed to avoid the difficulty in image alignment for imperfect data, followed by a robust factorization scheme to handle outlying and missing data. The novelty and main contributions of the paper are as follows: (i) as a new addition to previous...
The paper focuses on 3D structure and motion factorization from uncalibrated image sequences. A rank-4 affine factorization algorithm and a robust structure and motion factorization scheme are proposed to handle outlying and missing data. The novelty and main contribution of the paper are as follows: (i) The rank-4 factorization algorithm is a new addition to previous affine factorization family using...
Water environment databases deposit a great deal of information which may predict the future development of some water minim elements in water. These databases are so complex that some environment predicted methods, generally, can not objectively analysis the associational rules of these minim elements in water. To discover some important information from these water databases, this paper proposes...
The paper is focused on the problem of structure and motion factorization from uncalibrated image sequences. Based on our early study on quasi-perspective projection, we give an analysis on the imaging errors of different projection models and propose to adopt power factorization algorithm to deal with missing data problem. The main contribution lies in two aspects. First, we carry out an error analysis...
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