Imaging system, calibration method, and calibrator

A calibration method performed by an imaging system that calibrates a parameter of an imaging apparatus, the calibration method comprising:

• causing a movable object that includes a marker for use in calibration to move into an imaging area of the imaging apparatus;
• causing the imaging apparatus to image the marker;
• and
• calibrating an internal parameter of the imaging apparatus, using an image that includes the marker, the image being captured by the imaging apparatus imaging the marker.

A calibrator for a camera, comprising:

• a controlling circuit configured to control a movable body to move into a shooting area of the camera, a marker being provided on the movable body for calibration of the camera;
• a photographing circuit configured to control the camera to photograph the marker;
• a calculating circuit configured to calculate at least one parameter of the camera based on the photographed marker;
• and
• an instructing circuit configured to transmit the at least one parameter to the camera to calibrate the camera.