| 主权项 |
1. A method of attaching a vehicle-mounted camera including a cover housing including a tabular top plate and a camera main assembly, the vehicle-mounted camera being attached to a glass surface on a vehicle interior side of a window glass via a positioning member in a posture in which the top plate extends along the window glass facing forward or rearward of a vehicle body, and capable of capturing an image of a scene of a vehicle exterior, the method comprising:
assuming in advance a plurality of inclination angles as inclination angles of the glass surface; assuming in advance a plurality of positioning angles smaller in number than the plurality of inclination angles; specifying an inclination angle of the glass surface of the vehicle body to which the vehicle-mounted camera is to be attached to provide a specified inclination angle; selecting at least one positioning angle from the plurality of positioning angles assumed in advance and preparing a positioning member having the at least one positioning angle selected to provide a prepared positioning member; and fixing the vehicle-mounted camera to the glass surface of the vehicle body via the prepared positioning member; wherein the camera main assembly includes a lens assembly and an image sensor; the cover housing includes an attachment seat; a surface of the prepared positioning member includes a housing-side positioning portion to come into contact with the attachment seat at at least three housing-side contact points and a glass-side positioning portion to come into contact with the glass surface of the vehicle body at at least three glass-side contact points; one point among the at least three housing-side contact points is provided in a position different from a straight line passing through remaining points of the at least three housing-side contact points; one point among the at least three glass-side contact points is provided in a position different from a straight line passing through remaining points of the at least three glass-side contact points; the at least one positioning angle selected is a difference between a direction determined by the at least three housing-side contact points and a direction determined by the at least three glass-side contact points; the at least one positioning angle selected is selected by a method of referring to the specified inclination angle of the glass surface and a difference between the direction determined by the at least three housing-side contact points and a direction of an optical axis of the camera main assembly;
the vehicle-mounted camera includes: a board connected to the camera main assembly and accommodated in the cover housing; and
a processing circuit mounted on the board and capable of executing, by electronically processing an image captured by the camera main assembly, at least attachment direction detection processing and direction calculation processing; in the attachment direction detection processing, in a state in which the vehicle-mounted camera is attached to the glass surface via the positioning member, a target object image of a target object for direction detection located in a known direction when viewed from the vehicle body is acquired through image-capturing by the camera main assembly; a position of the target object for direction detection on the target object image is detected; an attachment direction deviation of the camera main assembly calculated using the known direction and the position of the target object for direction detection is retained in the processing circuit; and in the direction calculation processing, from a position on an image of an object captured by the camera main assembly, a direction in which the object is located when viewed from the vehicle body is calculated using both of the known direction and the position of the target object for direction detection or the attachment direction deviation. |
