Patent Document ID: 20100014713
Application ID: 12175622
Patent Status: 0

Claim One:
1. A method of detecting road lane markers using a light-based sensing technology, the method comprising the steps of: capturing reflectivity data using a light-based sensing device; generating a light intensity signal based on the captured reflectivity data received by the light-based sensing device; convolving the light intensity signal with a differential filter for generating a filter response that identifies a candidate lane marker region and ground segment regions juxtaposed on each side of the candidate lane marker region; calculating a weighted standard deviation of data points within the identified candidate lane marker region; calculating a standard deviation of data points within the ground segment regions juxtaposed to the candidate lane marker region; determining an objective value for the identified candidate lane marker region as a function of the weighted standard deviation of data points within the candidate lane marker region, the weighted standard deviation of data points within the ground segment regions juxtaposed to the identified candidate lane marker region, and a number of data points contained within the identified candidate lane marker region; and comparing the objective value to a respective threshold for determining whether the identified candidate lane marker region is a lane marker.