Vision system for vehicle

Patent metadata

Field	Value
Publication number	US-9643605-B2
Application number	US-201514922640-A
Country	US
Kind code	B2
Filing date	Oct 26, 2015
Priority date	May 3, 2002
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A forward-facing vision system for a vehicle includes a forward-facing camera disposed in a windshield electronics module attached at a windshield of the vehicle and viewing through the windshield. A control includes a processor that, responsive to processing of captured image data, detects taillights of leading vehicles during nighttime conditions and, responsive to processing of captured image data, detects lane markers on a road being traveled by the vehicle. The control, responsive to lane marker detection and a determination that the vehicle is drifting out of a traffic lane, may control a steering system of the vehicle to mitigate such drifting, with the steering system manually controllable by a driver of the vehicle irrespective of control by the control. The processor, based at least in part on detection of lane markers via processing of captured image data, determines curvature of the road being traveled by the vehicle.

First claim

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A forward-facing vision system for a vehicle, said forward-facing vision system comprising:
a forward-facing camera comprising an imaging sensor and a lens;
said imaging sensor comprising a plurality of photo-sensing pixels arranged in a matrix of multiple horizontal rows of photo-sensing pixels and multiple vertical columns of photo-sensing pixels;
wherein said forward-facing camera is disposed in a windshield electronics module attached at a windshield of a vehicle equipped with said forward-facing vision system, said forward-facing camera, when disposed in said windshield electronics module attached at the windshield, viewing through the windshield exteriorly of the equipped vehicle;
wherein said imaging sensor is operable to capture image data representative of a scene exterior of the equipped vehicle and in the field of view of said forward-facing camera;
a control comprising a processor;
wherein said processor, responsive to processing of captured image data, detects taillights of leading vehicles within the exterior field of view of said forward-facing camera when the equipped vehicle is operated under nighttime conditions;
wherein said processor, responsive to processing of captured image data, detects lane markers within the exterior field of view of said forward-facing camera on a road being traveled by the equipped vehicle;
wherein said control, responsive to said lane markers detection and to a determination based at least in part on processing of captured image data by said processor that the equipped vehicle is drifting out of a traffic lane that the equipped vehicle is currently travelling in and when a turn signal of the equipped vehicle is not being activated, controls a steering system of the equipped vehicle to adjust the steering direction of the equipped vehicle to mitigate such drift out of the traffic lane the equipped vehicle is travelling in, and wherein said steering system is manually controllable by a driver of the equipped vehicle irrespective of control by said control;
wherein said processor processes captured image data via an edge detection algorithm to detect edges of vehicles present exteriorly of the equipped vehicle and within the exterior field of view of said forward-facing camera;
wherein said processor processes captured image data to estimate distance from the equipped vehicle to a detected vehicle that is present exteriorly of the equipped vehicle and within the exterior field of view of said forward-facing camera;
wherein said processor, based at least in part on detection of lane markers via processing of captured image data, determines curvature of the road being traveled by the equipped vehicle; and
wherein said processor processes captured image data for at least one driver assistance system of the equipped vehicle selected from the group consisting of (i) a traffic sign recognition system of the equipped vehicle, (ii) a stop light recognition system of the equipped vehicle, (iii) a stop sign recognition system of the equipped vehicle and (iv) a vehicle speed control system of the equipped vehicle.

2. The forward-facing vision system of claim 1 , wherein, responsive to processing of captured image data by said processor, said forward-facing vision system approximates distance to a vehicle detected within the exterior field of view of said forward-facing camera.

3. The forward-facing vision system of claim 1 , wherein said processor, responsive to processing of captured image data, detects headlights of oncoming vehicles within the exterior field of view of said forward-facing camera when the equipped vehicle is operated under nighttime conditions.

4. The forward-facing vision system of claim 1 , wherein said control receives image data from a camera mounted at a driver-side exterior rearview mirror of the equipped vehicle and wherein said control receives image data from a camera mounted at a passenger-side exterior rearview mirror of the equipped vehicle.

5. The forward-facing vision system of claim 1 , wherein said processor processes less than approximately 75 percent of captured image data.

6. The forward-facing vision system of claim 1 , wherein said control, responsive to taillight detection via processing of captured image data, provides an output for a headlamp control system of the equipped vehicle that controls at least one headlamp of the equipped vehicle.

7. The forward-facing vision system of claim 6 , wherein image data captured by said forward-facing camera is processed by said processor one way for said headlamp control system and is processed by said processor another way for said at least one driver assistance system of the equipped vehicle.

8. The forward-facing vision system of claim 1 , wherein said at least one driver assistance system of the equipped vehicle comprises a vehicle speed control system of the equipped vehicle, and wherein, responsive at least in part to processing of captured image data by said processor, speed of the equipped vehicle is adjusted in accordance with at least one of (i) a road condition detected by said forward-facing vision system and (ii) a traffic condition detected by said forward-facing vision system.

9. The forward-facing vision system of claim 8 , wherein said vehicle speed control system, responsive at least in part to processing of captured image data by said processor, adjusts a cruise control setting of an adaptive cruise control system of the equipped vehicle.

10. The forward-facing vision system of claim 9 , wherein, responsive at least in part to processing by said processor of captured image data detecting a curve in the road ahead of the equipped vehicle, speed of the equipped vehicle is reduced to an appropriate speed for traveling around the detected curve without a driver of the equipped vehicle manually deactivating cruise control of the equipped vehicle, and wherein the equipped vehicle resumes the speed set by the adaptive cruise control system after travelling through the detected curve to again travel along a generally straight section of road.

11. The forward-facing vision system of claim 1 , wherein, when the detected leading vehicle is determined to be within a threshold distance from the equipped vehicle, speed of the equipped vehicle is reduced.

12. The forward-facing vision system of claim 1 , wherein said forward-facing vision system is operable to provide image data to a remote device that is remote from the equipped vehicle, and wherein said forward-facing vision system provides said image data to indicate at least one of (i) a location of the equipped vehicle and (ii) a condition of the equipped vehicle.

13. The forward-facing vision system of claim 1 , wherein said processor is operable to determine whether detected edges constitute a portion of a vehicle located exterior of and ahead of the equipped vehicle, and wherein said processor is operable to track said detected edges over multiple frames of image data captured by said imaging sensor.

14. The forward-facing vision system of claim 1 , wherein said at least one driver assistance system of the equipped vehicle comprises a vehicle speed control system of the equipped vehicle, and wherein said vehicle speed control system comprises an adaptive cruise control system, and wherein said adaptive cruise control system comprises said forward-facing camera and a radar.

15. The forward-facing vision system of claim 14 , wherein, during operation of said adaptive cruise control system, said forward-facing camera is primary to said ra

Assignees

• Magna Electronics Inc

Inventors

• Pawlicki John A
• Mcmahon Martha A
• Chinn Steven G
• Gibson Joel S

Classifications

• B60W30/18

  Propelling the vehicle · CPC title

• B60K31/0008 Primary

  including means for detecting potential obstacles in vehicle path · CPC title

• B60W2555/20

  Ambient conditions, e.g. wind or rain · CPC title

• B60W2554/4041

  Position · CPC title

• B60W2554/80

  Spatial relation or speed relative to objects · CPC title