Results 141 to 150 of about 46,600 (175)

Efficient ESPI method to identify vibration characteristics of transparent films.

Optics Letters, 2021
Electronic speckle pattern interferometry (ESPI) has been frequently used to study vibration characteristics of engineering structures. However, efficient ESPI methods for identifying the vibration characteristics of transparent membranes are rarely ...
Yinhang Ma, Hanyang Jiang, Hao Cheng, Minyang Wu, Xiaoyuan He, Fujun Yang   +5 more
semanticscholar   +1 more source

Binarization for low-quality ESPI fringe patterns based on preprocessing and clustering.

Applied Optics, 2021
Massive inherent speckle noise and extremely low contrast make it difficult to binarize electronic speckle pattern interferometry (ESPI) fringe patterns.
Lei Chen, Chen Tang, Min Xu, Z. Lei
semanticscholar   +1 more source

Batch denoising of ESPI fringe patterns based on convolutional neural network.

Applied Optics, 2019
The denoising of electronic speckle pattern interferometry (ESPI) fringe patterns is a key step in the application of ESPI. In this paper, we propose a method for batch denoising of ESPI fringe patterns based on a convolution neural network (CNN). In the
Fugui Hao, Chen Tang, Min Xu, Z. Lei
semanticscholar   +1 more source

The self-(in)sufficiency of the Caribbean: Ecosystem services potential Index (ESPI) as a measure for sustainability

, 2020
Sustainability of Small Island Developing States (SIDS) is a growing concern particularly under climate change scenarios. Under the Ecosystem Service (ES) framework, we analyse the performance of five Caribbean countries (Cuba, Dominican Republic, Haiti,
Nelson Grima, S. Singh
semanticscholar   +1 more source

Skeleton extraction and inpainting from poor, broken ESPI fringe with an M-net convolutional neural network.

Applied Optics, 2020
Extracting skeletons from fringe patterns is the key to the fringe skeleton method, which is used to extract phase terms in electronic speckle pattern interferometry (ESPI).
Chenxiu Liu, Chen Tang, Min Xu, Fugui Hao, Z. Lei   +4 more
semanticscholar   +1 more source

Generalized denoising network LGCT-Net for various types of ESPI wrapped phase patterns.

Journal of The Optical Society of America A-optics Image Science and Vision
In this paper, we propose a generalized network based on our proposed Local-Global Channel Transformer (LGCT) module for denoising various types of ESPI wrapped phase patterns (including low-density, medium-density, high-density, variable-density, and ...
Hongxuan He, Chen Tang, Le Liu, Liao Zhang, Zhenkun Lei   +4 more
semanticscholar   +1 more source

Binarization of ESPI fringe patterns based on an M-net convolutional neural network.

Applied Optics, 2020
The fringe skeleton method is the most straightforward method to estimate phase terms in electronic speckle pattern interferometry (ESPI). It usually needs to binarize the fringe patterns.
Chenxiu Liu, Chen Tang, Min Xu, Z. Lei
semanticscholar   +1 more source

An investigation of fracture properties and size effects of concrete using the ESPI technique

, 2020
In order to study the size effect in concrete fracture, three-point bending tests are performed on five groups of geometrically similar concrete beams.
Hongniao Chen, R. Su, A. Fok, Bo Yuan
semanticscholar   +1 more source

A clustering framework based on FCM and texture features for denoising ESPI fringe patterns with variable density

Optics and lasers in engineering, 2019
Denoising of electronic speckle pattern interferometry (ESPI) fringe patterns with variable density is challenging. In this paper, we present a method to denoise ESPI fringe patterns with variable density by constructing a clustering framework.
Mingming Chen, Chen Tang, Min Xu, Z. Lei
semanticscholar   +1 more source

Leaks detection in stainless steel kegs via ESPI

Optics and lasers in engineering, 2018
Integrity assessment of kegs is necessary to preserve the quality of the content stored and, consequently, human health. Here we show that inspection optical technique based on ESPI can be adopted successfully for assessing fully integrity of stainless ...
V. Pagliarulo, V. Bianco, P. Memmolo, C. Distante, B. Ruggiero, P. Ferraro   +5 more
semanticscholar   +1 more source