Principle of two-dimensional code calibration board

The two-dimensional code after the algorithm can correct the lens distortion, and it is actually a flat plate with a fixed spacing pattern array.

CalibrationTarget is used to correct lens distortion in machine vision, image measurement, photogrammetry, 3D reconstruction and other applications. Determine the conversion relationship between physical size and pixels; In order to determine the relationship between the three-dimensional geometric position of a point on the surface of a space object and its corresponding point in the image, it is necessary to establish the geometric model of camera imaging. The geometric model of the camera can be obtained by shooting the flat plate with a pattern array with fixed spacing and calculating the calibration algorithm, so as to obtain high-precision measurement and reconstruction results. And a flat plate with a fixed pitch pattern array is a calibration plate.