One Method of Self-Calibration in Spite of Varying Internal Camera Parameters

Camera calibration is an indispensable step to obtain 3D geometric information from 2D images, in conventional most of research for camera self-calibration still concentrates on camera internal parameters constant. When camera internal parameters occur variety, general method can’t gear to the circumstance. To research this problem, this paper presents a new method which based on the modulus constraint for camera self-calibration in spite of varying internal camera parameters. This method has certain value to further work of the camera self-calibration, and builds the foundation for the camera self-calibration varying internal parameters.