| 摘要 |
A designated line input unit (210) displays a first road surface image (291), and a user designates a straight line within the road surface image (291). A designated line calculation unit (220) projects a point group indicating a plurality of points measured by a laser scanner onto the first road surface image (291) using a camera posture angle value indicated by camera posture angle value data (299) and a plurality of three-dimensional coordinate values included in three-dimensional point group data (293), and calculates coordinate values of the designated line on the basis of the point group projected onto the first road surface image (291). A reference image display unit (230) projects the designated line onto a second road surface image (291) using the camera posture angle value, and displays, as a reference image, the second road surface image (291) onto which the designated line is projected. The user designates a correction amount for correcting the camera posture angle value according to the deviation between the straight line within the second road surface image (291) and the designated line projected onto the second road surface image (291), and a camera posture angle value correction unit (240) corrects the camera posture angle value on the basis of the designated correction amount. |
