arXiv:2606. 26260v1 Announce Type: cross Abstract: In laser penetration welding, the assessment of penetration state and weld seam morphology plays a crucial role in determining the weld quality.
By Sen Li, Haichao Cui, Chendong Shao, Yaqi Wang, Xinhua Tang
The study evaluates automatic weld seam segmentation using RGB and polarimetric images, comparing convolutional neural networks (CNNs) and transformer architectures. In controlled RGB settings, CNNs achieve a mean mask mAP50 of up to 0.87, but performance drops significantly under uncontrolled conditions. Polarimetric imaging, combined with geometric augmentation, reaches a mean mask mAP50 of up to 093 even in uncontrolled settings, and transformer models, especially RF‑DETR, maintain high accuracy under viewpoint shifts while CNNs fail.
By Simone Garbin, Leonardo Venturoso, Marco Todescato
The paper presents a multi‑modal deep learning model that uses temporal attention to detect internal welding defects such as porosity, lack of penetration, fusion, undercut, and cold lap in fillet joints during real‑time Gas Metal Arc Welding. Trained on images and sound data from an industrial collaborative welding robot, the model achieves an F1 score of 0.99. Explainable AI techniques are applied to interpret the model’s behavior, highlighting key image and sound spectrogram regions and the most effective modality for each defect type, thereby enhancing trust and reliability in AI‑driven welding inspection.
By Mobina Mobaraki, Mahyar Asadi, Klaske Van Heusden, Guy A. Dumont
arXiv:2608.29475v1 Announce Type: new
Abstract: Surface material recognition from incomplete visual observations remains a challenging problem in robotic perception and environmental understanding. T...
By Sindhuja Penchala, Sudip Mittal, Noorbakhsh Amiri Golilarz
arXiv:2609.39738v1 Announce Type: new
Abstract: Learning to generate machining process plans and toolpaths from B-rep CAD requires coupling discrete operation decisions with continuous tool motion as...
By Xiaolei Zhou, Boyi Lin, Yuchao Feng, Jianwei Zheng
arXiv:2609.36844v1 Announce Type: new
Abstract: Transparent surfaces are ubiquitous in built environments, yet they remain a persistent failure case for robotic perception. RGB cameras perceive the b...
By Suhani Grover, Astik Srivastava, Viswas Dinesh, Avinash Sharma, K. Madhava Krishna