Human Shape Recognition Algorithm Design Based on Hu Moments and Zernike Moments

Chen, Weiguo; Lu, Jinchuan

doi:10.2991/icmmita-16.2016.160

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…e Sobol' sequence is obtained by constructing a group called the 'direction number' [43]. Assuming that m i is a positive odd number less than 2 n , then…”

Section: Sensitivity Analysismentioning

confidence: 99%

Side Wear Prediction of a Subway Outer Rail on Small Radius Curves Based on System Dynamics of Discrete Supported Track

Yin

Kou

Wei

et al. 2022

Discrete Dynamics in Nature and Society

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When a subway train runs on a small radius curve, it causes serious side wear of the outer rail, and a large number of the outer rails of the curve are replaced frequently due to excessive side wear. This paper proposes three prediction models based on the response surface methodology (RSM), support vector machine (SVM), and the relative vector machine (RVM) to estimate the remaining useful life (RUL) of a metro outer rail at a small radius curve determined by rail side wear. In these proposed models, the directly measurable parameters, including various track geometries, axle loads, and primary suspension stiffnesses related to vehicle types, are taken into account. These parameters are proposed from the side wear mechanism and subjected to the method of global sensitivity analysis to rank them in order of importance. The rail side wear for various scenarios is calculated through a numerical simulation model of the vehicle-unballasted track and Specht friction wear. Furthermore, with the help of simulation experiments and field cases, the prediction performances of three different prediction models are analyzed in detail. The comparison indicates that the predictive model based on RVM is superior in the prediction of RUL based on rail wear. The findings presented in this paper can provide certain reference values for infrastructure managers (IMs).

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“…e Sobol' sequence is obtained by constructing a group called the 'direction number' [43]. Assuming that m i is a positive odd number less than 2 n , then…”

Section: Sensitivity Analysismentioning

confidence: 99%

Side Wear Prediction of a Subway Outer Rail on Small Radius Curves Based on System Dynamics of Discrete Supported Track

Yin

Kou

Wei

et al. 2022

Discrete Dynamics in Nature and Society

View full text Add to dashboard Cite

show abstract

“…Global features include contour representations, shape descriptors, and texture features. Shape Matrices, Invariant Moments (Hu, Zerinke), Histogram Oriented Gradients (HOG), and Co-HOG are some examples of global descriptors [23]. Local features describe the image patches (key points in the image) of an object.…”

Section: Introductionmentioning

confidence: 99%

Multi view registration of C.elegans embryo

Bagheri¹

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Multi-view microscopy techniques are used to increase the resolution along the optical axis for 3D imaging. Without this, the resolution is insufficient to resolve subcellular events. In addition, parts of the images of opaque specimens are often highly degraded or masked. Both problems motivate scientists to record the same specimen from multiple directions. The images, then have to be digitally fused into a single high-quality image. Selective-plane illumination microscopy has proven to be a powerful imaging technique due to its unsurpassed acquisition speed and gentle optical sectioning. However, even in the case of multi view imaging techniques that illuminate and image the sample from multiple directions, light scattering inside tissues often severely impairs image contrast. Here we show that for c-elegans embryos multi view registration can be achieved based on segmented nuclei. However, segmentation of nuclei in high density distribution like c-elegans embryo is challenging. We propose a method which uses 3D Mexican hat filter for preprocessing and 3D Gaussian curvature for the post-processing step to separate nuclei. We used this method successfully on 3 data sets of c-elegans embryos in 3 different views. The result of segmentation outperforms previous methods. Moreover, we provide a simple GUI for manual correction and adjusting the parameters for different data. We then proposed a method that combines point and voxel registration for an accurate multi view reg- istration of c-elegans embryo, which does not need any special experimental preparation. We demonstrate the performance of our approach on data acquired from fixed embryos of c-elegans worms. This multi step approach is successfully evaluated by comparison to different methods and also by using synthetic data. The proposed method could overcome the typically low resolution along the optical axis and enable stitching to- gether the different parts of the embryo available through the different views. A tool for running the code and analyzing the results is developed.

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Human Shape Recognition Algorithm Design Based on Hu Moments and Zernike Moments

Cited by 2 publications

References 4 publications

Side Wear Prediction of a Subway Outer Rail on Small Radius Curves Based on System Dynamics of Discrete Supported Track

Side Wear Prediction of a Subway Outer Rail on Small Radius Curves Based on System Dynamics of Discrete Supported Track

Multi view registration of C.elegans embryo

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