Full‐field deformation measurement by videogrammetry using self‐adaptive window matching

2019 ◽  
Vol 34 (165) ◽  
pp. 36-62 ◽  
Author(s):  
Sa Gao ◽  
Xiaohua Tong ◽  
Peng Chen ◽  
Zhen Ye ◽  
Ouling Hu ◽  
...  
Keyword(s):  
Deformation Measurement ◽  
Full Field ◽  
Adaptive Window ◽  
Self Adaptive

scholarly journals Vision-based Deformation Measurement for Pile-soil Testing

2019 ◽  
Vol 275 ◽  
pp. 03009
Author(s):  
Kun Zhou ◽  
Linhua Chen ◽  
Shanshan Yu
Keyword(s):  
Measurement Method ◽  
Optical Measurement ◽  
High Sensitivity ◽  
Steel Tube ◽  
Image Features ◽  
Deformation Measurement ◽  
Measurement Technology ◽  
Full Field ◽  
Progressive Development ◽  
Point Tracking

Image measurement technology has been widely used in monitoring the deformation of the soil field around the pile with its advantages of no damage, no contact, full-field measurement, no added quality and high sensitivity. But there are few researches on image-based bearing deformation measurement of the pile. Through an indoor pile-soil semi-model test, the rigid body displacement and load-bearing deformation of a new type of prefabricated steel tube pile foundation under horizontal load was measured based on image features. In this study, the concept of optical extensometer is first applied to the measurement of local average strain of a non-uniform deformed structure. Based on an improved feature point tracking algorithm SURF-BRISK, non-contact measurement of tiny strain of pile body is realized. In addition, based on DIC technology, this study also obtained the progressive development of displacement field of soil around pile. The above work fully reflects the non-contact convenience and full-field richness of the optical measurement method compared with the traditional measurement method.

Seismic attributes estimation using a self-adaptive window

2014 ◽  
Author(s):  
Tengfei Lin* ◽  
Junxin Guo ◽  
Bo Zhang ◽  
Kurt Marfurt ◽  
Deshuang Chang
Keyword(s):  
Seismic Attributes ◽  
Adaptive Window ◽  
Self Adaptive
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