CALIBRATION INDICATOR USED FOR CALIBRATION OF ONBOARD CAMERA, CALIBRATION METHOD OF ONBOARD CAMERA USING CALIBRATION INDICATOR, AND PROGRAM FOR CALIBRATION DEVICE OF ONBOARD CAMERA USING CALIBRATION INDICATOR

摘要

For use in calibration of an onboard camera, there are provided a calibration index free of erroneous detection and a method of calibrating an onboard camera using such calibration index. The calibration index for use in onboard camera calibration includes a curved graphic formed of a curved line surrounding a predetermined region and a linear graphic comprising at least two straight lines forming an intersection point within the region surrounded by the curved graphic, the curved graphic and the linear graphic being formed in a same plane. A plurality of segments separated by the curved line forming the curved graphic and the straight lines forming the linear graphic are colored in a checkered pattern.