Defect Detection of Patterned Fabric by Spectral Estimation Technique and Rough Set Classifier

2013 ◽  
Author(s):  
Min Li ◽  
Zhong-Min Deng ◽  
Lijing Wang
Keyword(s):  
Rough Set ◽  
Defect Detection ◽  
Spectral Estimation ◽  
Estimation Technique

Digital Holography Using Spectral Estimation Technique

2014 ◽  
Vol 10 (3) ◽  
pp. 235-242 ◽  
Author(s):  
Peng Xia ◽  
Yasunori Ito ◽  
Yuki Shimozato ◽  
Tatsuki Tahara ◽  
Takashi Kakue ◽  
...  
Keyword(s):  
Digital Holography ◽  
Spectral Estimation ◽  
Estimation Technique

Parallel phase-shifting digital holography using spectral estimation technique

2014 ◽  
Vol 53 (27) ◽  
pp. G123 ◽  
Author(s):  
Peng Xia ◽  
Yasuhiro Awatsuji ◽  
Kenzo Nishio ◽  
Shogo Ura ◽  
Osamu Matoba
Keyword(s):  
Digital Holography ◽  
Spectral Estimation ◽  
Phase Shifting ◽  
Estimation Technique

scholarly journals A Novel Multi-Dimensional Spectrum Estimation Technique using Antenna Array Displacement

2011 ◽  
Vol 1 (03) ◽  
Author(s):  
Viet-Ha Pham ◽  
Dominic Grenier ◽  
Jean-Yves Chouinard
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Spectral Estimation ◽  
Plane Waves ◽  
Spectrum Estimation ◽  
Estimation Technique ◽  
Antenna Aperture ◽  
Area Of Interest ◽  
Dimensional Spectrum ◽  
Small Antenna

Conventionally, in multi-dimensional spectral estimation techniques, each data snapshot in space is captured simultaneously. All antenna elements or sensors being used to collect data are sampled at the same time. By doing so, the size of the antenna array is proportional to the area of interest in space. The antenna array is prohibitively huge if the area that we want to cover is large. In this paper, in order to reduce the number of antenna elements in use, we propose a novel multi-dimensional spectrum estimation technique based on displacing small antenna arrays along predefined paths. It includes a data measurement technique which sequentially collects data samples within each snapshot in space according to a predefined order, and a spectral estimation technique which is based on the Discrete Fourier Transform (DFT) of the collected data. The key idea is to create a large synthetic antenna aperture by displacing a small antenna array along a predefined trajectory. Impinging waves are assumed uniform plane waves. The performance of the proposed technique is evaluated by simulation. The applications of the proposed technique include synthetic aperture radar, radar image processing and sonar systems.

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