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The advantages of Cooperative Navigation (CN) stem from the observation sharing. However, the applicability is constrained by the available communication bandwidth. Exploiting fewer bits representing the real-valued observation is an alternative approach. Maximum A Posteriori (MAP) and Minimum Mean Square Error (MMSE) estimators for the quantized version estimation and the state parameter estimation...
A robust tracking algorithm based on the particle filter with multi-cue adaptive fusion is proposed which can overcome the shortcoming of single visual cue in complex environments. The color and the texture based on the discrete wavelet transform (DWT) are used to describe the tracking target. The weights are adaptively adjusted using the democratic integration according to the current tracking situations,...
This paper proposes a new method for moving-objects detection based on fusion of background subtraction and an improved three frames differencing. In the method, the adaptive background model is build by Gaussian model for each pixel in the image sequences, and combined with temporal differencing method to update the selective background, and simultaneously use background subtraction method to extract...
In order to improve the navigation accuracy of an autonomous underwater vehicle, a terrain passive integrated navigation system, which consists of strapdown inertial navigation system, underwater terrain map, bathometer, magnetic compass and doppler log is presented. In the integrated system, the position measure equation of terrain match algorithm is as measurement equation, which adding to the doppler...
Blotches are the common artifacts in archived films image sequences. The processing procedure of the existing methods can be characterized as two parts: detection and restoration. This paper focuses on some problems about both parts. For blotches detection, a new post processing method based on region labeling is presented to remove the noises. For restoration, the simplified motion vector repair...
A new sub-pixel subdivision location algorithm for estimating the position of the star on the focal plane array is proposed. An analytical study of the optics theoretical point spread functions is presented and it is shown that the star intensity distribution is close to the Gaussian point spread function model. Based on the numerical model of the star, a Gaussian curved fitting algorithm for centroiding...
In this paper, the nonlinear approximation by piecewise constants is investigated, and a partition method for balancing the total variation over the intervals is proposed. Based on this method, the result of Kahane is proved, and the application in signal restoration is given. Finally, the numerical experiments are conducted to assess the proposed method in comparison with different wavelet thresholding...
A novel and effective approach to the global motion estimation and moving object extraction is proposed in this paper. Firstly, the translational motion model was used by the fact that complex motion can be decomposed as a sum of translational components. Then in this application, the edge gray horizontal and vertical projections were used as the block matching feature for the motion vector estimation...
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