Research on Real-Time 3D Image Acquisition System Based on Stripe Projection

In response to the demand for rapid acquisition of three-dimensional profiles in industrial online inspection, a real-time 3D image acquisition system has been designed and researched. This system is based on the principles of optical projection and binocular vision fusion, utilizing a DLP projector and industrial cameras to construct a hardware platform, along with the development of an efficient 3D reconstruction algorithm. A three-frequency phase-shifting coding scheme is employed in the stripe pattern design, and a phase unwrapping algorithm guided by a quality map is proposed to enhance reconstruction reliability. The system achieves parallel processing through a CUDA heterogeneous computing platform and establishes a four-stage pipeline structure to optimize real-time performance. Experimental results show that the system meets the expected goals in key metrics such as spatial resolution, measurement accuracy, and real-time performance. In practical applications on the mobile phone casing inspection production line, the system demonstrates superior detection efficiency and reliability compared to traditional methods. The research results provide a complete solution for rapid 3D inspection, holding significant engineering application value in fields like industrial quality inspection and reverse engineering.