Calibration unit for a monitoring device, monitoring device for man-overboard monitoring, and method for calibration

A monitoring device (1) for man-overboard monitoring having a calibration unit (2),

• wherein the monitoring device (1) is designed as a man-overboard monitor,
• wherein the monitoring device (1) has at least one camera (5a, 5b) for video monitoring of a ship section (4) and for providing video data,
• wherein the camera (5a, 5b) has at least one intrinsic calibration parameter (11) and at least one extrinsic calibration parameter (12),
• wherein the video data are provided to the calibration unit (2), and the calibration unit (2) includes:
• an input module (9) for input of at least one calibration element (10) by a user,
• an evaluation module (8), wherein the evaluation module (8) is configured to determine unknown calibration parameters (11, 12) based on the calibration element (10), and
• an evaluation unit (7), wherein the evaluation unit (7) is configured to determine a kinematic variable of an object moving in a monitoring region (4) based on the video data, wherein the evaluation unit (7) is designed to study the object for the presence of a man-overboard event based on the kinetic variable.

A method for calibrating a monitoring device (1) for man-overboard monitoring, the method comprising:

• using a calibration unit (2) that includes
• an input module (9) for input of at least one calibration element (10) by a user, and
• an evaluation module (8),
• to define one or more calibration elements (10), wherein unknown calibration parameters (11, 12) are determined based on video data of a camera (5a, 5b) and the one or more calibration elements (10).