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- W2898095767 abstract "Abstract Computer vision‐based displacement measurement for structural monitoring has grown popular. However, tracking natural low‐contrast targets in low‐illumination conditions is inevitable for vision sensors in the field measurement, which poses challenges for intensity‐based vision‐sensing techniques. A new edge‐enhanced‐matching (EEM) technique improved from the previous orientation‐code‐matching (OCM) technique is proposed to enable robust tracking of low‐contrast features. Besides extracting gradient orientations from images as OCM, the proposed EEM technique also utilizes gradient magnitudes to identify and enhance subtle edge features to form EEM images. A ranked‐segmentation filtering technique is also developed to post‐process EEM images to make it easier to identify edge features. The robustness and accuracy of EEM in tracking low‐contrast features are validated in comparison with OCM in the field tests conducted on a railroad bridge and the long‐span Manhattan Bridge. Frequency domain analyses are also performed to further validate the displacement accuracy." @default.
- W2898095767 created "2018-11-02" @default.
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- W2898095767 date "2018-10-12" @default.
- W2898095767 modified "2023-10-14" @default.
- W2898095767 title "Edge‐Enhanced Matching for Gradient‐Based Computer Vision Displacement Measurement" @default.
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- W2898095767 doi "https://doi.org/10.1111/mice.12415" @default.
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