Abstract: A lane line recognition apparatus includes an imaging device, a lane-line-search-region setting section, a light-streak-search-region setting section, a light-streak determination section, a light-streak-reaching determination section, and a mask processing section. The imaging device is to be mounted on a vehicle and captures an image of a traveling environment in front of the vehicle. The lane-line-search-region setting section sets a lane-line search region on the image. The light-streak-search-region setting section sets a light-streak search region adjacently to the lane-line search region. The light-streak determination section determines whether a light streak that crosses, in a vertical direction of the image, the light-streak search region is found. The light-streak-reaching determination section determines, if the light streak is found, whether the light streak reaches the lane-line search region.

Abstract: A lane line recognition apparatus includes an imaging device, a lane-line-search-region setting section, a light-streak-search-region setting section, a light-streak determination section, a light-streak-reaching determination section, and a mask processing section. The imaging device is to be mounted on a vehicle and captures an image of a traveling environment in front of the vehicle. The lane-line-search-region setting section sets a lane-line search region on the image. The light-streak-search-region setting section sets a light-streak search region adjacently to the lane-line search region. The light-streak determination section determines whether a light streak that crosses, in a vertical direction of the image, the light-streak search region is found. The light-streak-reaching determination section determines, if the light streak is found, whether the light streak reaches the lane-line search region.

Abstract: For a lane line search range set in a captured image obtained through imaging of the travel direction of a vehicle, a first lane line detection process detects a lane line based on a luminance image for more than half of rows within the search range, and detects a lane line based on a color difference image for the other rows, while a second lane line detection process detects a lane line based on the color difference image for a greater number of rows than in the first process. Then, a mode switchover control process performs mode switchover determination between the first and second modes based on the number of rows where a lane line of a predefined width or wider has been detected, from among the rows where a lane line has been detected, and performs mode switchover control based on the determination result.

Abstract: In the lane line detection performed by a left-right similar object detection module, changes in brightness in the road width direction in a image plane are evaluated, a point group serving as a lane line candidate is extracted, and a lane line model is generated by calculating the parallax of left and right lane line candidate points and transforming the result into real space coordinates. A camera displacement diagnosis module determines a camera displacement by calculating a diagnostic value based on a difference between the parallaxes of the left and right lane lines in the same horizontal line between reference comparative images captured by a stereo camera unit. Where the camera displacement has occurred, a vehicle control device is instructed to stop the control function or make a transition to failsafe control, and a warning is issued instructing a user to take the vehicle to a maintenance site for inspection.

Abstract: For a lane line search range set in a captured image obtained through imaging of the travel direction of a vehicle, a first lane line detection process detects a lane line based on a luminance image for more than half of rows within the search range, and detects a lane line based on a color difference image for the other rows, while a second lane line detection process detects a lane line based on the color difference image for a greater number of rows than in the first process. Then, a mode switchover control process performs mode switchover determination between the first and second modes based on the number of rows where a lane line of a predefined width or wider has been detected, from among the rows where a lane line has been detected, and performs mode switchover control based on the determination result.

Abstract: In the lane line detection performed by a left-right similar object detection module, changes in brightness in the road width direction in a image plane are evaluated, a point group serving as a lane line candidate is extracted, and a lane line model is generated by calculating the parallax of left and right lane line candidate points and transforming the result into real space coordinates. A camera displacement diagnosis module determines a camera displacement by calculating a diagnostic value based on a difference between the parallaxes of the left and right lane lines in the same horizontal line between reference comparative images captured by a stereo camera unit. Where the camera displacement has occurred, a vehicle control device is instructed to stop the control function or make a transition to failsafe control, and a warning is issued instructing a user to take the vehicle to a maintenance site for inspection.