Abstract: A camera takes an image or images of a region including a vehicle (vehicle-in-front) running in front of a driver's own vehicle. A wheel information acquiring unit acquires the positional information of a wheel or wheels of the vehicle-in-front in the image taken by the camera. More specifically, the boundary between the wheels of the vehicle-in-front and the road surface. The processing for detecting the boundary is done by use of the difference in the brightness between the wheels and the road surface of the vehicle-in-front. A camera attitude correcting unit corrects the detected boundary by use of a self-calibration function, and a road surface condition estimating unit estimates the conditions of the road surface on which the vehicle-in-front is traveling.

Abstract: A cable fixing member is provided including a pair of bracket members that hold a cable therebetween and a fitting part that fits into the pair of bracket members. The fitting part includes a convex portion having an arc-shaped cross sectional face formed in one bracket member of the pair of bracket members; and a concave portion formed in the other bracket of the pair of bracket members and having an arc-shaped cross sectional face with which the convex portion is fitted, wherein the pair of bracket members are rotatably formed with the fitting part as a rotation center, so that facing surfaces of the pair of bracket members that hold the cable can be opened and closed.

Abstract: A camera takes an image or images of a region including a vehicle (vehicle-in-front) running in front of a driver's own vehicle. A wheel information acquiring unit acquires the positional information of a wheel or wheels of the vehicle-in-front in the image taken by the camera. More specifically, the boundary between the wheels of the vehicle-in-front and the road surface. The processing for detecting the boundary is done by use of the difference in the brightness between the wheels and the road surface of the vehicle-in-front. A camera attitude correcting unit corrects the detected boundary by use of a self-calibration function, and a road surface condition estimating unit estimates the conditions of the road surface on which the vehicle-in-front is traveling.

Abstract: A cable fixing member is provided, comprising: a pair of bracket members that hold a cable therebetween; and a fitting part that fits into the pair of bracket members, wherein the fitting part comprises: a convex portion having an arc-shaped cross sectional face formed in one bracket member of the pair of bracket members; and a concave portion formed in the other bracket member of the pair of bracket members and having an arc-shaped cross sectional face with which the convex portion is fitted, wherein the pair of bracket members are rotatably formed with the fitting part as a rotation center, so that facing surfaces of the pair of bracket members that hold the cable can be opened and closed.