A Hierarchical Visual Grasping Architecture Based on YOLOv5 With Hyperparameter Optimization

Caihong Zhao, Yuhang Ye, Xu Zhou, Yanyu Chen and Yuanhao Yang
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Caihong Zhao: Suzhou University of Technology, China
Yuhang Ye: Suzhou University of Technology, China
Xu Zhou: Suzhou University of Technology, China
Yanyu Chen: Suzhou University of Technology, China
Yuanhao Yang: Suzhou University of Technology, China

International Journal of Swarm Intelligence Research (IJSIR), 2025, vol. 16, issue 1, 1-27

Abstract: Fruit picking in complex orchard environments is limited by the low detection and recognition accuracy due to clustered background, illumination variation, and partial occlusion. To improve the picking performance, a hierarchical visual grasping architecture based on You Look Only Once (YOLO) algorithm and adaptive error compensation is proposed. The upper layer uses YOLOv5 and inverse kinematics to recognize and localize the target. Ant colony optimization is specifically used for hyperparameter tuning of YOLOv5 to improve the detection accuracy. The middle layer dynamically compensates for the output torque of the joint actuator through the feedback linearization method. The lower layer finishes precise grasping through nonlinear mapping model between the pulse width modulation signal and the servo angle. Experimental results validate that the proposed architecture outperforms traditional methods by reaching 98.2% and 97.7% recognition accuracy in obstacle-free scenarios and complex environments, a higher grasping success rate, and a lower positioning deviation.

Date: 2025
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