Enhanced clear path detection in the presence of traffic infrastructure indicator

• US 9,652,980 B2
• Filed: 04/23/2014
• Issued: 05/16/2017
• Est. Priority Date: 04/24/2008
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Naik, Sanjeev M., Zhang, Wende
• Primary Examiner(s): LIN, ABBY YEE
• Application Number:
  US14/259,367
• Publication Number:
  US 20140236463A1
• Time in Patent Office: 1,119 Days
• CPC Class Codes: B60W 2420/403 Image sensing, e.g. optical camera
• CPC Class Codes: B60W 30/09 Taking automatic action to avoid collision, e.g. braking and steering
• CPC Class Codes: G06V 20/58 Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
• CPC Class Codes: G06V 20/582 of traffic signs
• CPC Class Codes: G06V 20/584 of vehicle lights or traffic lights
• CPC Class Codes: G06V 20/588 Recognition of the road, e.g. of lane markings; Recognition of the vehicle driving pattern in relation to the road
• CPC Class Codes: G08G 1/00 Traffic control systems for road vehicles arrangement of road signs or traffic signals E01F9/00 ; automatic vehicle control B62D
• CPC Class Codes: G08G 1/163 involving continuous checking

Abstract

A method for detecting a clear path of travel for a vehicle utilizing analysis of a plurality of images generated by a camera device located upon the vehicle includes monitoring the images. The images are analyzed including determining a clear path upon which a potential road surface can be estimated from other portions of the images that do not indicate a potential road surface, and determining an image of a traffic infrastructure indication. The method further includes determining the content of the traffic infrastructure indication, modifying the clear path based upon the content of the traffic infrastructure indication, and utilizing the modified clear path in navigation of the vehicle.

Claims

1. Method for determining an enhanced clear path of travel for a vehicle utilizing analysis of a plurality of images generated by a camera device located upon the vehicle, the method comprising:

within a processing module;

monitoring images from the camera device;

analyzing the images comprising determining a clear path upon which a potential road surface can be estimated from other portions of the images that do not indicate a potential road surface;

determining a traffic infrastructure indication, comprising;

monitoring a device generating data describing a traffic infrastructure indication;

comparing the traffic infrastructure indication with the determined clear path;

determining the determined clear path describes a condition that invalidates the traffic infrastructure indication;

enhancing the traffic infrastructure indication by modifying it to correspond with the determined clear path;

analyzing the data describing the enhanced traffic infrastructure indication to describe a threshold condition, comprising;

determining a current vehicle operating parameter;

comparing the determined current vehicle operating parameter to the enhanced traffic infrastructure indication; and

indicating the threshold condition based upon the comparing of the determined current vehicle operating parameter to the enhanced traffic infrastructure indication, said threshold condition selected to minimize at least one of non-critical and non-desirable distractions upon the vehicle; and

analyzing the threshold condition and the clear path to determine an enhanced clear path, comprising augmenting the threshold condition with the clear path to generate a mutual benefit refinement based upon the augmenting of the threshold condition with the clear path, by;

comparing the clear path to the indicated threshold condition; and

enhancing the clear path by modifying the clear path based upon the comparing; and

utilizing the enhanced clear path in navigation of the vehicle, including controlling vehicle control mechanisms based upon the enhanced clear path and operating the vehicle to travel along the enhanced clear path of travel.

2. The method of claim 1, further comprising:

monitoring informational inputs describing operation of the vehicle; and

wherein analyzing the data describing the enhanced traffic infrastructure indication to describe the threshold condition is based upon the informational inputs.

3. The method of claim 2, wherein monitoring informational inputs describing operation of the vehicle comprises monitoring a speed of the vehicle and a distance of the vehicle from the traffic infrastructure indication;

and

wherein analyzing the data describing the enhanced traffic infrastructure indication to indicate the threshold condition comprises

analyzing the data describing the enhanced traffic infrastructure indication utilizing a database to discern a traffic signal,

comparing the monitored speed of the vehicle and the distance of the vehicle from the traffic signal, and

indicating the threshold condition based upon the comparing.

4. The method of claim 1, wherein analyzing the data describing the enhanced traffic infrastructure indication to describe the threshold condition comprises determining a current speed limit;

and

wherein analyzing the threshold condition and the clear path to determine the enhanced clear path comprises;

comparing the clear path to the current speed limit; and

modifying the clear path based upon the comparing.

5. The method of claim 1, wherein analyzing the data describing the enhanced traffic infrastructure indication to describe the threshold condition comprises determining an upcoming road geometry;

and

wherein analyzing the threshold condition and the clear path to determine the enhanced clear path comprises;

comparing the clear path to the upcoming road geometry; and

modifying the clear path based upon the comparing.