Semi-automatic Camera Calibration Using Coplanar Control Points

Camera calibration is a prerequisite for computer vision and photogrammetry applications that infer knowledge about an object?s shape and location from images. Many implementations of camera calibration methods are freely available on the Internet. We have reviewed eleven existing camera calibration tools within a feature oriented framework for comparison, and our findings show that achieving the required accuracy can be quite cumbersome. Automatic detection of control points and live capture of calibration images are two key features that would simplify the process. We have developed a new camera calibration tool, with automatic control point extraction and live capture. Our semi-automatic application achieves the same level of accuracy as one of the most widely used camera calibration tools in computer vision applications.