Research On 2D Front-Visual Point Image Based On Stereo Images

A main task in Computer Vision is the target recognition problem from 2D image to 3D entity. The main problem exists in such field is the way to extract multi-scale and multi-visual point 2D image and offer a multi-scale and multi-visual matching template for further target recognition by using 3D information rebuilt from multi-visual point 2D image. In this paper we proposed a method to produce multi-scale and multi-visual point image sequence by two steps:3D structure rebuilt from remote-control image and the projective geometry model we built to simulate visual point transform caused by movement of observer in air vehicles.In this paper, we set up an algorithm to produce multi-visual point images based on satellite remote-control stereo images and did necessary research and experiments involved in Digital Photogrammetry and Computer Vision.Firstly, we built a practical 3D reconstruction algorithm based on target's stereo image pair, then we built a 3D model of target by using VTK(Visual toolkit).Secondly, we proposed a coordinate system transform from object space coordinates to simulation 3D space coordinates, which means the transform from Geocentric coordinate system which determines the location of observer in air vehicles to the plane coordinate system which determines the location of target's 3D model in the simulation 3D space. In this paper we also transformed and located the observer attitude coordinate system which described the camera pose by 3 angle parameters: elevation,roll,azimuth, from object space to simulation 3D space structured by OpenGL toolkit. Therefore, we rebuilt the relative location relationship between target and observer in air vehicle in the simulation 3D space and produce 2D reference images with the same visual point as observer in air vehicle.This paper proposed a new method to produce multi-scale and multi-visual images. It's necessary to match 2D reference image with 3D target generally used in applications in city plan and construction,eco-environmental construction planning,unpiloted technology and precision guidance technology.