Research On 3D Measurement Method Of Complex Scene Based On Structured-light Filed Technology

Among various three-dimensional(3D)methods,optical 3D measurement technology has been widely used in industry,entertainment,biomedicine and other fields with its non-contact characteristic.In recent years,the interests of 3D measurement focus on continuously optimizing accuracy,gradually overcoming the restrictions on scenarios,and reducing equipment costs,etc.Structured-light field technology is a new type of optical 3D measurement technology,effectively combining the high-precision of structured-light and the real-time advantages of light field imaging technology.As it also has simple hardware structure and also is expected to achieve rapid and even real-time 3D reconstruction,structured-light filed technology has broad prospects for applications.Normally,in order to balance accuracy when achieve real-time measurement,the current structured-light field usually limits the complexity of measured scenes,such as simple background,single target,contour smoothing,etc..However,these requirements are all contradictory to the goal of overcoming the restrictions on scenarios,especially achieving 3D measurement with extremely high complexity.Therefore,this paper aims at proposing a real-time and high-precision 3D measurement system which can be used in complex scenarios based on structured-light field technology.We provide a valid route for universal 3D measurement applications,and fully prove its versatility,real-time characteristic and accuracy by experiments.This paper focuses on introducing structured-light field technology,single-shot wrapped phase calculation,and the optimized system set-up and algorithm design.The main contributions of this work are described as follows,and 1,3,4,5 conclude the innovations.1.Establish a 3D measurement system that can be applied to real-time measurement tasks of complex scenes.This system overcomes the limitations in scene complexity of current structured-light field technology,and provides 3D measurement applications which require complicated,dynamic,and precise measurement with a way out.2.Calibrate the system based on the mature calibration principle of the light-field device and the joint calibration principle of the binocular system.It provides a parameter guarantee for the subsequent preliminary 3D measurement and final 3D reconstruction.3.Make full use of the 4D light field data,and propose a multi-clue fusion segmentation algorithm.Unlike other light field segmentation techniques that only use depth cues as guidance,this paper innovatively use the short-term peak-frequency cues obtained by Windowed Fourier Filtering(WFF)as another clue.4.Design an adaptive-WFF algorithm,revising the global parameter design strategy to an adaptive one which is designed according to local features.This algorithm is proved to have more stability and higher accuracy.5.Solve the stratification of point cloud by optimizing both system design and algorithm process and finally improve the robustness and fault tolerance of the whole system.What’s more,a priori guidance about fringe coding is discussed here,weighing system accuracy and performance stability at the same time.