Optimization of Dithering Frequency Matching Technique for Mechanically Dithered Ring Laser Gyros

2016 ◽  
Vol 43 (10) ◽  
pp. 1001003
Author(s):  
马仰华 Ma Yanghua ◽  
韩宗虎 Han Zonghu ◽  
王继良 Wang Jiliang
Author(s):  
Cuiping Yu ◽  
Xincheng Ma ◽  
Xiangyu Meng ◽  
Yuanan Liu ◽  
Xiangyang Duan

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5564
Author(s):  
Jong-Hwan Son ◽  
Han-Gyeol Kim ◽  
Hee-Jeong Han ◽  
Taejung Kim

Current precise geometric correction of Geostationary Ocean Color Imager (GOCI) image slots is performed by shoreline matching. However, it is troublesome to handle slots with few or no shorelines, or slots covered by clouds. Geometric correction by frequency matching has been proposed to handle these slots. In this paper, we further extend previous research on frequency matching by comparing the performance of three frequency domain matching methods: phase correlation, gradient correlation, and orientation correlation. We compared the performance of each matching technique in terms of match success rate and geometric accuracy. We concluded that the three frequency domain matching method with peak search range limits was comparable to geometric correction performance with shoreline matching. The proposed method handles translation only, and assumes that rotation has been corrected. We need to do further work on how to handle rotation by frequency matching.


2017 ◽  
Vol 842 ◽  
pp. 012013 ◽  
Author(s):  
Xiuming Yang ◽  
Xinglin Guo ◽  
Huajiang Ouyang ◽  
Dongsheng Li

2019 ◽  
Author(s):  
Carmen Guguta ◽  
Jan M.M. Smits ◽  
Rene de Gelder

A method for the determination of crystal structures from powder diffraction data is presented that circumvents the difficulties associated with separate indexing. For the simultaneous optimization of the parameters that describe a crystal structure a genetic algorithm is used together with a pattern matching technique based on auto and cross correlation functions.<br>


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