CALIBRATION SYSTEM AND METHOD FOR MULTI-CAMERA VISION SYSTEM

摘要

A calibration system for a multi-camera vision system of a vehicle includes a plurality of calibration targets disposed at an area at which the vehicle is positioned for a calibrating procedure. The calibration targets may include a patterned array of markings, such as colored or black/white or shaded markings or dots, disposed at forward, rearward and/or sideward regions of the vehicle. The control is operable to process image data captured by the cameras and, responsive to processing of captured image data, the control is operable to determine a particular local pattern of markings of the respective calibration target to determine the position of the respective calibration target relative to the camera that is imaging that target. Responsive to processing of captured image data, the calibration system is operable to calibrate the multi-camera vision system of the vehicle.

主权项

1. A calibration system for a multi-camera vision system of a vehicle, said calibration system comprising:
a first camera disposed at a vehicle and having a first field of view rearward of the vehicle; a second camera disposed at the vehicle and having a second field of view generally sideward of the vehicle at a driver side of the vehicle; a third camera disposed at the vehicle and having a third field of view generally sideward of the vehicle at a passenger side of the vehicle; first, second and third calibration targets disposed at an area at which the vehicle is positioned for a calibrating procedure; wherein said first calibration target is encompassed by said first field of view of said first camera; wherein said second calibration target is encompassed by said second field of view of said second camera; wherein said third calibration target is encompassed by said third field of view of said third camera; wherein each of said calibration targets comprises a patterned array of markings, and wherein the pattern of said markings is irregular at each of said calibration targets; a control comprising an image processor operable to process image data captured by said first, second and third cameras; wherein said control stores in memory the respective patterns of said markings of said first, second and third calibration targets; wherein said control is operable to process image data captured by said cameras that are being calibrated, and wherein, responsive to processing of image data captured by each of said cameras, said control is operable to determine a particular local pattern of markings of the respective calibration target viewed by said camera to determine the position of the respective calibration target relative to said camera; and wherein, responsive to processing of captured image data, said calibration system is operable to calibrate said multi-camera vision system.