“In order to solve the problems of weak stability and low accuracy caused by factors such as measurement environment interference and geometric characteristics of the measured object in structured light 3D measurement systems, the research progress in the field of 3D measurement was introduced. The research team established a forward and backward complementary Gray code combined with phase-shifting method and dual projection single camera system to provide a solution to the stability and accuracy problems of structured light measurement, and the projection efficiency was improved by 55.51%.”