Research On Multi-view 3d Reconstruction Of Mechanical Parts Using Rgb-d Camera

The 3D reconstruction technology is a process of constructing a real scene or a three-dimensional model of an object by means of computer digitization.This technology is a hot topic in the field of reverse engineering in recent years.The current manufacturing industry requires rapid design and manufacture of products,so the development of reverse engineering,model reconstruction and other technologies is attracting more and more attentions from the manufacturing sector.Model reconstruction of mechanical parts is an important application direction of reverse engineering in the manufacturing industry,but the traditional 3D reconstruction technology requires 3D data measurement equipment which is extremely costly,and the method of reconstruction is very complicated.Therefore,the 3D model reconstruction technology with low price,high efficiency and simple operation has received more and more attention.This paper studies the multi-view 3D reconstruction technology of mechanical parts based on depth image and color image.The main research contents are as follows:The RGB-D camera is firstly used to extract the depth image and color image of mechanical parts in multiple angles of view,and convert it into 3D point cloud data in the 3D scene through the 2D-3D transformation matrix.Then use the bilateral filtering algorithm to remove the point cloud data noise,so as to segment 3D point cloud data of mechanical components in 3D scene;use Principal Component Analysis(PCA)to calculate the normal vector of point cloud data;use improved Iterative Closest Points(ICP)to realize the registration of point cloud data of multiple and adjacent view angles.The obtained point cloud data from registration is rotated and fused to finally produce the point cloud data of the mechanical part.This method optimizes the problem of excessive computational complexity caused by the registration and superposition of each view in Kinect multi-view 3D reconstruction.And the point cloud error is small.Then the paper studies the surface reconstruction algorithm based on Poisson equation.The method combines the advantages of global fitting surface reconstruction method and local fitting surface reconstruction method.The cubic polynomial interpolationalgorithm is used to effectively smooth the sawtooth generated after texture mapping,to generate the three-dimensional model of a part with complete closure,smooth surface and few voids.The three-dimensional reconstruction scheme proposed in this paper is simple in operation and low in cost,and can reconstruct the mechanical part model by a personal computer and a common RGB-D camera.The experimental results show that the proposed 3D reconstruction method has better robustness and accuracy,and the reconstructed 3D model has clear details and small dimensional error.