Vision-guided robotic harvesting of Toona sinensis sprouts: Integrating biomechanical calibration with improved YOLO instance segmentation - Zhiming Shi; Pengfei Dai; Fan He; Silan Wang; Hongkang Shi; Chunlei Wang; Shouyong Xie; Yunwu Li; Shoutai Li (Computers and Electronics in Agriculture, 2026)