Vehicle and road sign recognition device
First Claim
1. A vehicle comprising:
- an imaging means;
an image capturing means which captures a color image of a road via the imaging means;
an area extraction means which extracts areas having a similar color feature value from the captured color image of the road captured by the image capturing means;
a white balance processing means which performs, for each of the extracted areas extracted by the area extraction means, a white balance process of correcting each pixel data in the extracted area so as to reduce the degree of divergence in the level between color components according to a level balance between the color components of the pixel data in the extracted area; and
a road sign detection means which detects a road sign on the road from the color image subjected to the white balance process.
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Accused Products
Abstract
The present invention includes: image capturing means (2) which captures a color image of a road via imaging means (7); area extraction means (6) which extracts areas having a similar color feature value from the captured color image of the road; white balance processing means (5) which performs, for each of the extracted areas, a white balance process of correcting each pixel data in the extracted area so as to reduce the degree of divergence in the level between color components according to a level balance between the color components of the pixel data in the extracted area; and road sign detection means (6) which detects a road sign on the road from the color image subjected to the white balance process. Thus, even if the road illumination state is partially different, it is possible to accurately detect a road sign such as a lane mark from the captured color image of the road via the imaging means such as a camera.
32 Citations
16 Claims
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1. A vehicle comprising:
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an imaging means; an image capturing means which captures a color image of a road via the imaging means; an area extraction means which extracts areas having a similar color feature value from the captured color image of the road captured by the image capturing means; a white balance processing means which performs, for each of the extracted areas extracted by the area extraction means, a white balance process of correcting each pixel data in the extracted area so as to reduce the degree of divergence in the level between color components according to a level balance between the color components of the pixel data in the extracted area; and a road sign detection means which detects a road sign on the road from the color image subjected to the white balance process. - View Dependent Claims (2, 3, 4)
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5. A vehicle comprising:
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an imaging means; an image capturing means which captures a color image of a road via the imaging means; an area extraction means which extracts areas having a similar color feature value from the captured color image of the road captured by the image capturing means; a road range specifying means which specifies a road range that the road occupies in the color image; a white balance processing means which performs, for each of the extracted areas extracted by the area extraction means, a white balance process of correcting each pixel data in the extracted area so as to reduce the degree of divergence in the level between color components according to a level balance between the color components of the pixel data in the road range of the extracted area; and a road sign detection means which detects a road sign on the road from the color image subjected to the white balance process. - View Dependent Claims (6, 7, 8)
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9. A road sign recognition device comprising:
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an image capturing means which captures a color image of a road via an imaging means; an area extraction means which extracts areas having a similar color feature value from the captured color image of the road captured by the image capturing means; a white balance processing means which performs, for each of the extracted areas extracted by the area extraction means, a white balance process of correcting each pixel data in the extracted area so as to reduce the degree of divergence in the level between color components according to a level balance between the color components of the pixel data in the extracted area; and a road sign detection means which detects a road sign on the road from the color image subjected to the white balance process. - View Dependent Claims (10, 11, 12)
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13. A road sign recognition device comprising:
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an image capturing means which captures a color image of a road via an imaging means; an area extraction means which extracts areas having a similar color feature value from the captured color image of the road captured by the image capturing means; a road range specifying means which specifies a road range that the road occupies in the color image; a white balance processing means which performs, for each of the extracted areas extracted by the area extraction means, a white balance process of correcting each pixel data in the extracted area so as to reduce the degree of divergence in the level between color components according to a level balance between the color components of the pixel data in road range of the extracted area; and a road sign detection means which detects a road sign on the road from the color image subjected to the white balance process. - View Dependent Claims (14, 15, 16)
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Specification