Research On Coding Structure Light Information Processing In3D Measurement

Structured light3D measurement technology for nearly30years of history,coded structured light as the the mainstream development direction of structure light3D measurement, high efficiency, high precision measurement of the characteristics.At the same time, the structure of light adaptive3D measurement technology hasdeveloped by leaps and bounds as optical3D measurement technology for theemerging structure of the21st century. with measurement of high efficiency, highmeasurement accuracy. At the same time, the adaptive structure light3Dmeasurement technology has developed by leaps and bounds as optical3Dmeasurement technology for the emerging structure of the21st century.In this paper, mainly aim at the adaptive coding structured light technologyresearch, mainly targeted for the existing three-dimensional measurement whiteobjects limitations, design a adaptive encoding and decoding method for colorobject. The same time, for the regularity of the phenomenon of the target surface, inorder to improve the measurement speed, design an adaptive Gray Graycodestructured light3D measurement methods. The specific contents are as follows:First. Adopt projectors, digital cameras, computers independently to build athree-dimensional measurement platform, employ photography geometric model forsystem calibration, application the point cloud data has got, calculate the derivedpoint cloud data model and the object surface contour consistent, and achieved goodexperimental results.Second. Forcus on3D measurement technology for color the surface of theobject, to use regression analysis method in the mathematical modeling to design astructure of light color component of the adaptive access to technology, and to solvethe model parameter with the principle of least squares, The model was validatedusing Matlab software, Through experiments that the adaptive access to technology can be applied in the three-dimensional measurement of colored surface objects.Based on color component Adaptive access to technology, a color Graycodestructured light adaptive codec is designed for color objects in order to achieve three-dimensional measurement.Third. For the uneven surface of the object, design a based on the change ofsurface curvature adaptive measurement method, using an improved point ofcurvature calculation, adopt the error matrix eigenvalue to calculate the normalvectors of discrete points. Using least squares surface fitting to calculate the point ofcurvature, meanwhile, curvature values and structure of light measurement accuracyrelations analyzed, designed a based on the measured target curvature adaptivemethods of measurement. Based on the curvature and structure of light measure theaccuracy of the relationship, designed a Gray-scale Graycode adaptive coding andecoding technology, to achieve the adaptive three-dimensional measurement for theobject surface of regularly changes in order.Final. Simulation experiment for system platform and adaptive coding structurelight technology, the experiments show that the measured point cloud data areconsistent with the shape of the surface, there are very high precision. Meanwhile,simulation the adaptive coding structured light technology, Draw color adaptivecodec technology can be applied in the three-dimensional measurement of the colorof objects, Curvature-based adaptive measurement can reduce the unnecessarypoint cloud data, improve the measurement speed.