Systems and methods for detecting traffic signs
First Claim
1. A traffic sign detection system for a vehicle, comprising:
- at least one image capture device configured to acquire at least one image of an environment including a traffic sign ahead of the vehicle;
a data interface; and
at least one processing device programmed to;
receive the at least one image via the data interface;
transform the at least one image;
sample the transformed at least one image to generate a plurality of images having different sizes;
convolve the plurality of images with a template image;
compare one or more pixel values of the convolved images to a predetermined threshold; and
select local maxima of pixel values within local regions of the convolved images as attention candidates, the local maxima being greater than the predetermined threshold.
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Accused Products
Abstract
Systems and methods are provided for detecting traffic signs. In one implementation, a traffic sign detection system for a vehicle include at least one image capture device configured to acquire at least one image of a scene including a traffic sign ahead of the vehicle. The traffic sign detection system also includes a data interface and at least one processing device programmed to receive the at least one image via the data interface, transform the at least one image, sample the transformed at least one image to generate a plurality of images having different sizes, convolve each of the plurality of images with a template image, compare each pixel value of each convolved image to a predetermined threshold, and select local maxima of pixel values within local regions of each convolved image as attention candidates, the local maxima being greater than the predetermined threshold.
9 Citations
30 Claims
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1. A traffic sign detection system for a vehicle, comprising:
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at least one image capture device configured to acquire at least one image of an environment including a traffic sign ahead of the vehicle; a data interface; and at least one processing device programmed to; receive the at least one image via the data interface; transform the at least one image; sample the transformed at least one image to generate a plurality of images having different sizes; convolve the plurality of images with a template image; compare one or more pixel values of the convolved images to a predetermined threshold; and select local maxima of pixel values within local regions of the convolved images as attention candidates, the local maxima being greater than the predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A vehicle, comprising:
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a body; at least one image capture device mounted on the body and configured to acquire at least one image of an environment including a traffic sign ahead of the vehicle; a data interface; and at least one processing device programmed to; receive the at least one image via the data interface; transform the at least one image; sample the transformed at least one image to generate a plurality of images having different sizes; convolve the plurality of images with a template image; compare one or more pixel values of the convolved images to a predetermined threshold; and select local maxima of pixel values within local regions of the convolved image as attention candidates, the local maxima being greater than the predetermined threshold. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for detecting a traffic sign for a vehicle, comprising:
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acquiring, via at least one image capture device, at least one image of an environment including a traffic sign ahead of the vehicle; receiving, via a processing unit, the at least one image; transforming, via the processing unit, the at least one image; sampling, via the processing unit, the transformed at least one image to generate a plurality of images having different sizes; convolving, via the processing unit, the plurality of images with a template image; comparing, via the processing unit, one or more pixel values of the convolved image to a predetermined threshold; and selecting local maxima of pixel values within local regions of the convolved image as attention candidates, the local maxima being greater than the predetermined threshold. - View Dependent Claims (30)
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Specification