Zengguo Sun

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The calibration factors of synthetic aperture radar (SAR) images are generally obtained by estimation of radar system parameters based on internal calibration and external calibration. In this paper, we propose a simple but efficient method to estimate the calibration factors based on statistical modeling of scattering coefficient. Taking expectation and(More)
Positive alpha-stable distribution is used to model the nonnegative quantity with impulsive property. Based on negative-order moments, three methods are used to estimate the parameters of positive alpha-stable distribution in this paper. First, a ratio estimator based on the ratio of negative-order moments is presented whose performance is significantly(More)
Despite considerable advances made in face recognition in recent years, the recognition performance still suffers from insufficient training samples. Hence, various algorithms have been proposed for addressing the problems of small sample size with dramatic variations in illuminations, poses and facial expressions in face recognition. Among these(More)
This paper proposes a new method to track and measure 3D information of moving object by using two PTZ(Pan-tilt Zoom) cameras. In our 3D measurement method, the optical axis of two PTZ cameras are not required to be parallel or a fixed angle, the 3D information can be measured even though the pan and tilt of two PTZ cameras are changed freely. The SIFT(More)
The parameters of K distribution are estimated in this paper, and the log-cumulant estimator is proposed based on second-kind statistics. The performance of the log-cumulant estimator is tested on the Monte Carlo simulations. Parameter estimation results demonstrate that the log-cumulant estimator leads to high estimation accuracy for the small values of(More)
The Mellin transformation-based method is developed to estimate the parameters of non-Rayleigh radar cross section (RCS) models for synthetic aperture radar (SAR) images from the observed image. Models investigated include heavy-tailed Rayleigh and Weibull. For each model, we consider the three kinds of images: intensity, square-root of intensity, and(More)