Method for the operation of an assistance system of a motor vehicle, as well as assistance system
First Claim
Patent Images
1. A method of operating a driver assistance system of a motor vehicle for detecting a rectangular traffic sign bounded by four edges in an environment outside of the motor vehicle, comprising steps:
- with a camera of the driver assistance system, acquiring an image of the traffic sign;
with a computing unit of the driver assistance system, analyzing only a portion of the image which comprises two vertically longitudinally extending rectangular areas that are arranged parallel and spaced apart relative to one another, and one horizontally longitudinally extending rectangular area that is arranged perpendicular to and in a spacing distance between the two vertically longitudinally extending rectangular areas, and thereby determining exactly three first line segments in the portion of the image of the traffic sign by detecting at least one substantially horizontal second line segment that exists in the horizontally longitudinally extending rectangular area in the image, detecting substantially vertical second line segments that exist in the vertically longitudinally extending rectangular areas in the image, and determining the three first line segments by selecting as the first line segments, a respective one of the second line segments that best satisfies at least one prescribed criterion in each one of the rectangular areas; and
with the computing unit, identifying a reproduction of the traffic sign based on and dependent on the three first line segments that were determined.
1 Assignment
0 Petitions
Accused Products
Abstract
A method is provided for operating a driver assistance system of a motor vehicle to detect a polygon-shaped (and especially rectangular) traffic sign with a number of edges. A camera acquires an image of the traffic sign. Within at least a portion of the image, a number of first line segments is determined, which is less than the number of edges of the traffic sign. Based on the first line segments, a reproduction of the traffic sign is identified.
9 Citations
13 Claims
-
1. A method of operating a driver assistance system of a motor vehicle for detecting a rectangular traffic sign bounded by four edges in an environment outside of the motor vehicle, comprising steps:
-
with a camera of the driver assistance system, acquiring an image of the traffic sign; with a computing unit of the driver assistance system, analyzing only a portion of the image which comprises two vertically longitudinally extending rectangular areas that are arranged parallel and spaced apart relative to one another, and one horizontally longitudinally extending rectangular area that is arranged perpendicular to and in a spacing distance between the two vertically longitudinally extending rectangular areas, and thereby determining exactly three first line segments in the portion of the image of the traffic sign by detecting at least one substantially horizontal second line segment that exists in the horizontally longitudinally extending rectangular area in the image, detecting substantially vertical second line segments that exist in the vertically longitudinally extending rectangular areas in the image, and determining the three first line segments by selecting as the first line segments, a respective one of the second line segments that best satisfies at least one prescribed criterion in each one of the rectangular areas; and with the computing unit, identifying a reproduction of the traffic sign based on and dependent on the three first line segments that were determined. - View Dependent Claims (2, 3, 4, 5, 6, 9, 10, 11, 12, 13)
-
-
7. A driver assistance system of a motor vehicle for detecting a rectangular traffic sign bounded by four edges in an environment outside of the motor vehicle, said driver assistance system comprising:
-
a camera configured and adapted to acquire an image of the traffic sign, and a computing unit configured and adapted to analyze only a portion of the image which comprises two vertically longitudinally extending rectangular areas that are arranged parallel and spaced apart relative to one another, and one horizontally longitudinally extending rectangular area that is arranged perpendicular to and in a spacing distance between the two vertically longitudinally extending rectangular areas, and thereby to determine exactly three first line segments in the portion of the image of the traffic sign by detecting at least one substantially horizontal second line segment that exists in the horizontally longitudinally extending rectangular area in the image, detecting substantially vertical second line segments that exist in the vertically longitudinally extending rectangular areas in the image, and determining the three first line segments by selecting as the first line segments, a respective one of the second line segments that best satisfies at least one prescribed criterion in each one of the rectangular areas, and wherein the computing unit is further configured and adapted to identify a reproduction of the traffic sign based on and dependent on the three first line segments that were determined. - View Dependent Claims (8)
-
Specification