Calibration device and method for combined camera in three-dimensional space

The invention discloses a device and a method for calibrating a combined camera in a three-dimensional space. The device comprises a rectangular calibration plate, a calibration module arranged on the calibration plate, and camera systems which surround the periphery of the calibration plate and are symmetrically arranged on the circumference of the same circle in an equal-arc manner, the method comprises the following steps: placing a cylindrical calibration object in a camera public shooting space area formed by a multi-camera system, and simultaneously shooting the three-dimensional calibration object in a multi-camera system coplanar synchronization mode; and carrying out operations of laser ray extraction, point set clustering, ellipse fitting and matrix matching on the shot image in sequence, thereby completing camera calibration. According to the device and the method for calibrating the combined camera in the three-dimensional space, high-precision, high-robustness and high-efficiency camera calibrati