Patent ID: 6930593

Claim:
A lane tracking system adapted for use with a vehicle, comprising: a first imaging device configured on the vehicle with an orientation and field of view so as to image a portion of the roadway in front of the vehicle; a second imaging device configured on the vehicle with an orientation and field of view so as to image a portion of the roadway to the rear of the vehicle; a memory storing first and second image data from the first and second imaging devices; and a processor coupled to receive the first and second image data from the memory, the processor performing image processing of the image data comprising determining if the image quality of the first image data is at a desired level, detecting roadway lane markers and determining vehicle position using the first image data if the first image data is at or above the desired level, determining if the image quality of the second image data is at the desired level, and detecting roadway lane markers and determining vehicle position using the second image data if the first image data is below the desired level and the second image data is at or above the desired level, wherein the processor determines if the image quality of the first and second image data is at the desired level by comparing the image contrast and signal strength to desired values.