Vehicle collision warning prevention method using optical flow analysis
First Claim
1. A vehicle collision warning prevention method using optical flow analysis, comprising the steps of:
- (a) extracting a forward video of a vehicle and video recognition information from a video recognition module mounted in the vehicle, and detecting a size change rate of a forward object included in the video recognition information at each frame of the forward video by an optical flow change rate detection unit;
(b) calculating an average optical flow change rate (OFCR) of a predetermined frame section based on a current point of time by the optical flow change rate detection unit;
(c) determining whether a value obtained by subtracting the average OFCR from a current OFCR is less than a predetermined threshold value by a warning suppression unit;
(d) determining that a brake operation signal is generated when it is determined at the step (c) that the value is less than the threshold value by the warning suppression unit;
(e) determining whether a collision warning signal is generated within a predetermined time after the step (d); and
(f) preventing an output of the collision warning signal when the collision warning signal is generated at the step (e).
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Abstract
A vehicle collision warning prevention method includes the steps of: (a) extracting a forward video of a vehicle and video recognition information from a video recognition module mounted in a vehicle, and detecting a size change rate of a forward object included in the video recognition information at each frame of the forward video; (b) calculating an average OFCR of a predetermined frame section; (c) determining whether a value obtained by subtracting the average OFCR from a current OFCR is less than a predetermined threshold value; (d) determining that a brake operation signal is generated when it is determined that the value is less than the threshold value; (e) determining whether a collision warning signal is generated within a predetermined time after the step (d); and (f) preventing an output of the collision warning signal when the collision warning signal is generated at the step (e).
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Citations
10 Claims
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1. A vehicle collision warning prevention method using optical flow analysis, comprising the steps of:
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(a) extracting a forward video of a vehicle and video recognition information from a video recognition module mounted in the vehicle, and detecting a size change rate of a forward object included in the video recognition information at each frame of the forward video by an optical flow change rate detection unit; (b) calculating an average optical flow change rate (OFCR) of a predetermined frame section based on a current point of time by the optical flow change rate detection unit; (c) determining whether a value obtained by subtracting the average OFCR from a current OFCR is less than a predetermined threshold value by a warning suppression unit; (d) determining that a brake operation signal is generated when it is determined at the step (c) that the value is less than the threshold value by the warning suppression unit; (e) determining whether a collision warning signal is generated within a predetermined time after the step (d); and (f) preventing an output of the collision warning signal when the collision warning signal is generated at the step (e). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification