A Computer Tool for 3D Shape Recovery of Fruits

Gaspar, Miguel; Pascoal‐Faria, Paula; Amado, Sandra; Alves, Nuno

doi:10.4028/www.scientific.net/amm.890.181

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…Most of these studies were based on the development of linear material models, and the serrated rheological phenomenon produced on the force–deformation curve of fruit makes the fruit more embodied viscoelastic, which is a nonlinear phenomenon caused by the stress relaxation property of biomaterials. Therefore, it is necessary to use experimental methods in contrast to simulation methods to carry bruise data measured after compressive experiments into improved injury models for calculation (Gaspar et al, 2019). At present, some studies have been carried out to investigate the bruise of fruits after being loaded, such as apples (Hu, 2017; Opara & Fadiji, 2018), peaches (Ahmadi et al, 2010; Kabas & Vladut, 2015), potatoes (Cai et al, 2020), pears (Kabas, 2010; Lee et al, 2014), tomatoes (Li et al, 2012; Li et al, 2013), kiwifruit (Du et al, 2019; Gao et al, 2021) and blueberries.…”

Section: Introductionmentioning

confidence: 99%

Study on the mechanism of local compression bruising in kiwifruit based on FEM

Mao,

Xie,

Wang

et al. 2023

J Food Process Engineering

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This study focuses on the relationship between local compression and local bruise volume of kiwifruits by means of finite element method (FEM). The effects of four indenter shapes and three compression directions on the local kiwifruit bruise were considered. The local bruise volume and the irregular cross section area of kiwifruit were calculated. Multi‐scale kiwifruit 3D modelling based on irregular cross‐sectional area computed by slice‐integration method. Local compression bruise was simulated by FEM. The results of the local bruise test show that the contact force and the bruise volume of kiwifruit are positive linear correlation. Comparing the simulation with the experimental, the mean absolute percentage error (MAPE) of the reconstructed model is 0.0394, and the R2 of contact force–bruise volume curve is 0.8203. The maximum equivalent forces and abrasions occur in the 0° and 90° loading directions with the square indenter has been showed by FEM results.Practical applicationsSe‐enriched kiwifruit has high nutrition and economic value. Kiwifruits are often influenced by a variety of factors and processes from harvest to consumption time. Cleaning, transport, and various processing operations including peeling and slicing in the kiwifruit industry are responsible for local bruise to kiwifruit. Therefore, understanding the mechanism of local bruise caused by local contact force of kiwifruit plays an important role in reducing kiwifruit waste in the postharvest stage. Local bruise mechanisms can be used in harvesting and post‐harvest mechanical design and product transportation and positioning equipment.

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Section: Introductionmentioning

confidence: 99%

Study on the mechanism of local compression bruising in kiwifruit based on FEM

Mao,

Xie,

Wang

et al. 2023

J Food Process Engineering

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“…Kochi et al [12] developed a three-dimensional shape-measuring system using images and a reliable assessment technique to measure shape features with high accuracy and volume. Gaspar et al [13] presented a volumetric reconstruction of the interior of a pear fruit using parallel slices and successfully overcame the difficulties in the registration of the tomograms by taking advantage of the possibility of scanning both sides. Kabutey et al [14] used 3D scanner Intel RealSense to determine three-dimension virtual models of avocado, salak, dragon fruit, and mango.…”

Section: Introductionmentioning

confidence: 99%

Fruit Morphological Measurement Based on Three-Dimensional Reconstruction

Wang

Chen

2020

Agronomy

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Three-dimensional (3D) shape information is valuable for fruit quality evaluation. Grading of the fruits is one of the important postharvest tasks that the fruit processing agro-industries do. Although the internal quality of the fruit is important, the external quality of the fruit influences the consumers and the market price significantly. To solve the problem of feature size extraction in 3D fruit scanning, this paper proposes an automatic fruit measurement scheme based on a 2.5-dimensional point cloud with a Kinect depth camera. For getting a complete fruit model, not only the surface point cloud is obtained, but also the bottom point cloud is rotated to the same coordinate system, and the whole fruit model is obtained by iterative closest point algorithm. According to the centroid and principal direction of the fruit, the cut plane of the fruit is made in the x-axis, y-axis, and z-axis respectively to obtain the contour line of the fruit. The experiment is divided into two groups, the first group is various sizes of pears to get the morphological parameters; the second group is the various colors, shapes, and textures of many fruits to get the morphological parameters. Comparing the predicted value with the actual value shows that the automatic extraction scheme of the size information is effective and the methods are universal and provide a reference for the development of the related application.

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