Monocular Vision Ranging and Camera Focal Length Calibration

The camera calibration in monocular vision represents the relationship between pixels’ units which is obtained from a and object real world. As an essential procedure, calculates three-dimensional geometric information captured two-dimensional images. Therefore, modified method based on polynomial regression proposed to simplify. In this method, parameter vector by pixel coordinates of obstacles corresponding distance values using regression. set parameter’s vectors can measure ground field under camera’s posture position. experimental results show that lowest accuracy focal length for measurement 97.09%, average was 99.02%.