Title :
Estimation of calibration factors using K model of scattering coefficient
Author :
Zengguo Sun ; Zhihua Zhang
Author_Institution :
Coll. of Comput. Sci. & Technol., Huaqiao Univ., Xiamen, China
Abstract :
A simple method is proposed to estimate the calibration factors from the image digital number (DN) in order to determine the linear relation of the scattering coefficient to the log-transformed DN. Taking the expectation and variance on the linear relation, and modeling the scattering coefficient as the K distribution, the analytical expressions of such estimators are obtained for linear receiver and square-law receiver. Monte Carlo simulation results demonstrate that the proposed calibration factor estimators lead to high estimating accuracy, so they are efficient for estimating the calibration factors from the DN.
Keywords :
Monte Carlo methods; electromagnetic wave scattering; K distribution; K model; Monte Carlo simulation; calibration factor estimation; calibration factor estimators; estimating accuracy; image DN; image digital number; linear receiver; linear relation; log-transformed DN; scattering coefficient modeling; square-law receiver; Calibration; Monte Carlo methods; Radar imaging; Radar scattering; Receivers; K distribution; Monte Carlo simulation; calibration factor estimation; image digital number; scattering coefficient;
Conference_Titel :
Natural Computation (ICNC), 2014 10th International Conference on
Conference_Location :
Xiamen
Print_ISBN :
978-1-4799-5150-5
DOI :
10.1109/ICNC.2014.6975962
