electronics Article Research of Hand–Eye System with 3D Vision towards Flexible Assembly Application Peidong Liang 1, Wenwei Lin 1, Guantai Luo 1 and Chentao Zhang 1,2,* 1 Fujian (Quanzhou)-HIT Research Institute of Engineering and Technology, Quanzhou 362000, China; lpd0004@hitqz.com (P....