Roadway type judgment method and apparatus
First Claim
1. A roadway type judgment method, comprising:
- calculating, with respect to image data from a camera mounted in or on a vehicle or image data obtained by carrying out a specified conversion on said image data from said camera, a feature amount of at least one component among a plurality of components in a specified color space of the image, and storing the calculated feature amount into a feature amount data storage;
determining whether or not said feature amount stored in said feature amount data storage satisfies a predetermined condition; and
judging, based on a determination result in said determining, whether or not said vehicle travels inside a tunnel, andwherein said feature amount in said calculating includes a feature amount of intensity and a feature amount of hue,said predetermined condition includes a condition relating to said intensity and a condition relating to said hue, andsaid feature amount of said intensity is an average value of intensity values, and said feature amount of said hue is a variance value of hue values.
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Abstract
This invention is to provide a tunnel detection technique, which is hardly affected by external circumstance at each time. A roadway type judgment method according to the invention includes: calculating, with respect to image data from a camera mounted in or on a vehicle or image data obtained by carrying out a specified conversion on the image data from the camera, a feature amount of at least one component among plural components in a specified color space of the image and storing the calculated feature amount into a feature amount data storage; determining whether or not the feature amount stored in the feature amount data storage satisfies a predetermined condition; based on a determination result at the determining, judging whether or not the vehicle travels inside a tunnel.
14 Citations
15 Claims
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1. A roadway type judgment method, comprising:
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calculating, with respect to image data from a camera mounted in or on a vehicle or image data obtained by carrying out a specified conversion on said image data from said camera, a feature amount of at least one component among a plurality of components in a specified color space of the image, and storing the calculated feature amount into a feature amount data storage; determining whether or not said feature amount stored in said feature amount data storage satisfies a predetermined condition; and judging, based on a determination result in said determining, whether or not said vehicle travels inside a tunnel, and wherein said feature amount in said calculating includes a feature amount of intensity and a feature amount of hue, said predetermined condition includes a condition relating to said intensity and a condition relating to said hue, and said feature amount of said intensity is an average value of intensity values, and said feature amount of said hue is a variance value of hue values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer-readable storage medium storing a roadway type judgment program for causing a computer to executed a process, comprising:
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calculating, with respect to image data from a camera mounted in or on a vehicle or image data obtained by carrying out a specified conversion on said image data from said camera, a feature amount of at least one component among a plurality of components in a specified color space of the image, and storing the calculated feature amount into a feature amount data storage; determining whether or not said feature amount stored in said feature amount data storage satisfies a predetermined condition; and judging, based on a determination result in said determining, whether or not said vehicle travels inside a tunnel, and wherein said feature amount in said calculating includes a feature amount of intensity and a feature amount of hue, said predetermined condition includes a condition relating to said intensity and a condition relating to said hue, and said feature amount of said intensity is an average value of intensity values, and said feature amount of said hue is a variance value of hue values.
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12. A roadway type judgment apparatus, comprising:
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a feature amount data storage device; a calculation unit that calculates, with respect to image data from a camera mounted in or on a vehicle or image data obtained by carrying out a specified conversion on said image data from said camera, a feature amount of at least one component among a plurality of components in a specified color space of the image, and stores the calculated feature amount into said feature amount data storage device; a determination unit that determines whether or not said feature amount stored in said feature amount data storage device satisfies a predetermined condition; and a judgment unit that judges, based on a determination result in said determining, whether or not said vehicle travels inside a tunnel, and wherein said feature amount calculated by said calculation unit includes a feature amount of intensity and a feature amount of hue, said predetermined condition includes a condition relating to said intensity and a condition relating to said hue, and said feature amount of said intensity is an average value of intensity values, and said feature amount of said hue is a variance value of hue values. - View Dependent Claims (13, 14, 15)
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Specification