Method for compensating for noise in lane drifting warning system

• US 6,433,816 B1
• Filed: 12/17/1999
• Issued: 08/13/2002
• Est. Priority Date: 07/08/1999
• Status: Expired due to Fees

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Lee, Dong-Min
• Primary Examiner(s): Le, Vu
• Assistant Examiner(s): SENFI, BEHROOZ M
• Application Number:
  US09/466,023
• Time in Patent Office: 970 Days
• Field of Search: 348/143, 348/148, 348/149, 348/169, 348/118, 382/199, 382/104, 382/298, 382/203, 382/153, 382/162
• US Class Current: 348/148
• CPC Class Codes: G06T 2207/10016 Video; Image sequence
• CPC Class Codes: G06T 2207/30256 Lane; Road marking
• CPC Class Codes: G06T 5/70 Denoising; Smoothing
• CPC Class Codes: G06T 7/12 Edge-based segmentation
• 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

Abstract

A method of compensating for noise in a lane drifting warning system for vehicles. The method includes the steps of converting input image signals into binary data; determining if the converted image signals are those from a start of a lane detecting process; reading previously stored data of the slant in the lane markers if it is determined that it is not the start of the lane detecting process; compensating for peripheral environment noise in the slant in the lane markers; extracting portions of the signals determined to be possible indications of road lane markers if it is determined that it is the start of the lane detecting process; extracting actual lane marker portions from the portions of the signals determined to be possible indications of road lane markers; measuring and storing a slant in the lane markers; calculating a width of a lane defined by the lane markers and determining if the vehicle is veering from the lane; and outputting a warning to alert the driver if the vehicle is veering from the lane.

Claims

1. A method of compensating for noise in a lane drifting warning system for vehicles comprising the steps of:

converting input image signals into binary data;

determining if the converted image signals are those from a start of a lane detecting process;

reading previously stored data of the slant in the lane markers if it is determined that it is not the start of the lane detecting process;

compensating for peripheral environment noise in the slant in the lane markers;

extracting portions of the signals determined to be possible indications of road lane markers if it is determined that it is the start of the lane detecting process;

extracting actual lane marker portions from the portions of the signals determined to be possible indications of road lane markers;

measuring and storing a slant in the lane markers;

calculating a width of a lane defined by the lane markers and determining if the vehicle is veering from the lane; and

outputting a warning to alert the driver if the vehicle is veering from the lane.

2. The method of claim 1 wherein in the step of compensating for peripheral environment noise in the slant in the lane markers, the slant in the lane markers is converted by adding to the slant a value equal to the amount of noise in the image signals to compensate for the noise.