Measurement of 3-DOF Planar Motion of the Object Based on Image Segmentation and Matching

Yang, Shuming; Shi, Xuejiao; Lv, Changshuo; Yang, Xiaokai

doi:10.1007/s41871-019-00041-7

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…Top-Hat transform [24] is used to detect the location of the plankton in the image as shown in Figure 7b, the weakness of this algorithm is that there are some missed cases. Figure 7c and Figure 7d show the detection results of the frame difference method [25] and the motion estimation and image matching method [26], respectively. We show the result from the scan line marking method [27] in Figure 7e results from the simple block-based sum of absolute differences flow (SD) method [28], and the Lucas-Kanade (LK) optical flow method [29] are given in Figure 7f,g.…”

Section: Comparison With Six Target Detection Methodsmentioning

confidence: 99%

Detection of the Deep-Sea Plankton Community in Marine Ecosystem with Underwater Robotic Platform

Wang

Yang

Ding³

et al. 2021

Sensors

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Variations in the quantity of plankton impact the entire marine ecosystem. It is of great significance to accurately assess the dynamic evolution of the plankton for monitoring the marine environment and global climate change. In this paper, a novel method is introduced for deep-sea plankton community detection in marine ecosystem using an underwater robotic platform. The videos were sampled at a distance of 1.5 m from the ocean floor, with a focal length of 1.5–2.5 m. The optical flow field is used to detect plankton community. We showed that for each of the moving plankton that do not overlap in space in two consecutive video frames, the time gradient of the spatial position of the plankton are opposite to each other in two consecutive optical flow fields. Further, the lateral and vertical gradients have the same value and orientation in two consecutive optical flow fields. Accordingly, moving plankton can be accurately detected under the complex dynamic background in the deep-sea environment. Experimental comparison with manual ground-truth fully validated the efficacy of the proposed methodology, which outperforms six state-of-the-art approaches.

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Section: Comparison With Six Target Detection Methodsmentioning

confidence: 99%

Detection of the Deep-Sea Plankton Community in Marine Ecosystem with Underwater Robotic Platform

Wang

Yang

Ding³

et al. 2021

Sensors

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show abstract

“…As a typical kind of delectometry, phase-measuring deflectometry (PMD) [1] with sinusoidal fringes [2][3][4] or binary pattern [5] has been developed for a decade for surface measurement from slopes or gradients. Particularly, software-configurable optical test system [6,7] based on PMD has been proposed for measuring large aspherical surfaces rapidly, robustly, 2 of 11 and accurately, similar to other kinds of image-based measurement methods [8]. Accurate phase measurement [9], systematic calibration [10,11], and three-dimensional (3D) reconstruction from slope information [12][13][14] are among the active topics.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Deformation Measurement of Specular Surface with Deflectometry and Speckle Digital Image Correlation

Wang

Cheng

et al. 2020

Sensors

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The deformation measurement of a specular surface is of great importance during the quality inspection and installation of optical elements or wafers, especially those with large apertures. We propose a deflectometry method with speckle digital image correlation (DeSDIC) to realize the dynamic and high-accuracy measurement of the deformation on specular surfaces, with a simple system structure and robustness to noises and environmental vibrations. Random speckle pattern displayed on liquid crystal display is reflected by the original surface under test (SUT), and the distorted pattern is recorded by a camera. This originally distorted pattern is taken as the reference image, and the patterns captured afterwards are digitally correlated with the reference image to calculate the gradient change and deformation of the SUT. The theoretical relationships and an experimental one-step calibration scheme are proposed. Both static and dynamic deformations of a deformable mirror were experimentally measured to demonstrate the feasibility and accuracy of DeSDIC, which is comparable to phase-measuring deflectometry and interferometry.

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Micro-Vision Super-Resolution Restoration and Positioning Based on Ultraprecision Machining Topography Guidance

Zhu,

Zhao,

2024

IEEE Trans. Instrum. Meas.

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Measurement of 3-DOF Planar Motion of the Object Based on Image Segmentation and Matching

Cited by 3 publications

References 20 publications

Detection of the Deep-Sea Plankton Community in Marine Ecosystem with Underwater Robotic Platform

Detection of the Deep-Sea Plankton Community in Marine Ecosystem with Underwater Robotic Platform

Dynamic Deformation Measurement of Specular Surface with Deflectometry and Speckle Digital Image Correlation

Micro-Vision Super-Resolution Restoration and Positioning Based on Ultraprecision Machining Topography Guidance

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