Establishment of Quasi-2D Control Field for Computer Vision Measurement

Establishment of quasi-2D control Held was a key step to founding CCD camera digital distortion model. The quasi-2D control field was set up in 3.52m × 2.24m region. 345 control points, with photo paper as agent, and made up with two squares, and signed with black and white colours, were evenly distributed in the quasi-2D control field. The 3D-coordinates of control points in the quasi-2D control field were measured by single measurement model electronic theodolite industrial surveying system of "Building Blocks Type". The measurement accuracy of the result excels 0.15 mm. The study result shows that foundation of CCD camera digital distortion model with quasi-2D control field is cheap, accurate and convenient.