Image Processing Basics: Camera Calibration
World Coordinates under Control
Applications of image processing in robotics or 3D metrology often call for the determination of real-world coordinates from the 2D data in the image file. The relationship between image coordinates and world coordinates can be described by a quantitative model of the image formation process. Geometrical camera calibration provides the values of these parameters by analysis of the images of calibration targets with well-defined reference points. The article describes the principles of this method.