I PointNet++ : Improved pointnet++ for segmentation and localization of leather grasp points / Jin Guang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 4 (04/2024)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIX, N° 4 (04/2024) . - p. 174-183 Titre : I PointNet++ : Improved pointnet++ for segmentation and localization of leather grasp points Type de document : texte imprimé Auteurs : Jin Guang, Auteur ; Ren Gonchang, Auteur ; Huan Yuan, Auteur ; Sun Jiangong, Auteur Année de publication : 2024 Article en page(s) : p. 174-183 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux Manutention -- Appareils et matériel Point de préhension Robotique Robots industriels Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In order to achieve accurate identification and positioning of leather grasp points during the process of robot grasp and spreading leather, this paper proposes a leather grasp point segmentation and positioning method based on improved PointNet++(IPointNet++). Taking leather in its natural falling state as the research object, a depth camera is used to collect point cloud data of the leather. Firstly, the preprocessing of leather point clouds is completed by removing background point clouds based on PassThroughFilter and eliminating noise based on Statistics Filter. Secondly, the octree sampling method is used to replace the farthest point sampling method of the original PointNet++, which is adapted to the nonrigid deformation characteristics of the leather itself. Thereby, the entire leather is divided into two parts: the main body and the grasp area. Lastly, the three-dimensional coordinates of the leather grasp points are obtained by solving the centroid of the point cloud data in the leather grasp area grasp. In the segmentation experiments, the improved PointNet++ has raised the mIoU by 11.8% and 2.5% comparing with PointNet and PointNet++ respectively, and the OA by 6.1% and 1.1%. In the grasp experiments, the success rate of leather grasp points identification grasp is 93.33%, and the success grasp rate grasp is 82.14%. The experimental results show that the proposed method has higher segmentation accuracy and good applicability. Note de contenu : - MATERIALS AND METHODS : Data acquisition - Point cloud preprocessing - Data Labeling - IMPROVEMENT OF THE POINTNET++ MODEL (I PointNet++) : Localization of leather frasp points - EXPERIMENTAL PROCESS AND RESULT ANALYSIS : Experimental conditions - Segmentation experiment - Grasp localization experiment - Table 1 : Experimental configuration - Table 2 : Training parameter settings - Table 3 : Segmentation accuracy results (%) - Table 4 : Test data for grasp localization experiment DOI : https://doi.org/10.34314/9y3ykt93 En ligne : https://drive.google.com/file/d/1dKFXpXeaLCElVID0fjTHz0xOudBN1eLf/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40825 [article]

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