Boundary line recognition apparatus
First Claim
1. A boundary line recognition apparatus comprising:
- an on-vehicle camera configured to acquire image of an area around a vehicle and to output image data;
a boundary line candidate extracting processor extracting one or more boundary line candidates which are present on a driving lane of the vehicle from the image data obtained by the on-vehicle camera;
a boundary line feature calculating processor calculating a likelihood which represents a degree of probability that a subject boundary line candidate is a boundary line on the driving lane extracted by the boundary line candidate extracting processor, wherein the subject boundary line candidate is part of the one or more boundary line candidates;
a boundary line selecting processor selecting a final boundary line candidate having a maximum likelihood as the boundary line on the driving lane from among the one or more boundary line candidates; and
a stripe pattern detecting processor detecting, from the image data obtained by the on-vehicle camera, a stripe pattern of indentation on the driving lane by determining that, the stripe pattern has a brightness of not more than a predetermined value, andwherein the boundary line feature calculating processor decreases the likelihood of the subject boundary line candidate when the stripe pattern detecting processor detects the presence of the stripe pattern.
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Accused Products
Abstract
In a boundary line recognition apparatus, a boundary line candidate extracting part extracts boundary line candidates from image data obtained by an on-vehicle camera based on known image processing such as pattern matching and Hough transform. One or more kinds of boundary line feature calculating parts calculate one or more likelihoods of each boundary line candidate. The likelihood indicates a degree of probability to be the boundary line. A boundary line feature combining means multiplies the likelihoods of each boundary line candidate and outputs a combined likelihood. A boundary line candidate selecting part selects the boundary line candidate having a maximum likelihood as the boundary line. The boundary line feature calculating part further calculates the likelihood of the boundary line candidate using a dispersion of brightness and an internal edge amount, and changes the likelihood based on an additional likelihood obtained by a driving lane surface feature extracting part.
19 Citations
4 Claims
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1. A boundary line recognition apparatus comprising:
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an on-vehicle camera configured to acquire image of an area around a vehicle and to output image data; a boundary line candidate extracting processor extracting one or more boundary line candidates which are present on a driving lane of the vehicle from the image data obtained by the on-vehicle camera; a boundary line feature calculating processor calculating a likelihood which represents a degree of probability that a subject boundary line candidate is a boundary line on the driving lane extracted by the boundary line candidate extracting processor, wherein the subject boundary line candidate is part of the one or more boundary line candidates; a boundary line selecting processor selecting a final boundary line candidate having a maximum likelihood as the boundary line on the driving lane from among the one or more boundary line candidates; and a stripe pattern detecting processor detecting, from the image data obtained by the on-vehicle camera, a stripe pattern of indentation on the driving lane by determining that, the stripe pattern has a brightness of not more than a predetermined value, and wherein the boundary line feature calculating processor decreases the likelihood of the subject boundary line candidate when the stripe pattern detecting processor detects the presence of the stripe pattern. - View Dependent Claims (2, 3, 4)
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Specification