Vehicle vision system with enhanced traffic sign recognition
First Claim
1. A vision system for a vehicle, said vision system comprising:
- a camera disposed at a vehicle and having a field of view exterior of the vehicle, said camera capturing image data;
a control disposed at the vehicle, wherein said control comprises an image processor operable to process image data captured by said camera;
wherein said control, responsive at least in part to putative detection of a traffic sign via image processing by said image processor of image data captured by said camera, enhances resolution of captured image data based at least in part on known traffic sign images to generate upscaled image data; and
wherein said control compares captured image data to upscaled image data to determine the putatively detected traffic sign.
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Abstract
A vision system for a vehicle includes a camera disposed at the vehicle and having a field of view exterior of the vehicle. The camera captures image data. A control includes an image processor operable to process image data captured by the camera. The control, responsive at least in part to putative detection of a traffic sign via image processing by the image processor of image data captured by the camera, enhances resolution of captured image data based at least in part on known traffic sign images to generate upscaled image data. The control compares captured image data to upscaled image data to determine and/or classify and/or identify the putatively detected traffic sign.
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Citations
20 Claims
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1. A vision system for a vehicle, said vision system comprising:
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a camera disposed at a vehicle and having a field of view exterior of the vehicle, said camera capturing image data; a control disposed at the vehicle, wherein said control comprises an image processor operable to process image data captured by said camera; wherein said control, responsive at least in part to putative detection of a traffic sign via image processing by said image processor of image data captured by said camera, enhances resolution of captured image data based at least in part on known traffic sign images to generate upscaled image data; and wherein said control compares captured image data to upscaled image data to determine the putatively detected traffic sign. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A vision system for a vehicle, said vision system comprising:
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a camera disposed at a vehicle and having a field of view exterior and forward of the vehicle, said camera capturing image data; a control disposed at the vehicle, wherein said control comprises an image processor operable to process image data captured by said camera; wherein said control, responsive at least in part to putative detection of a traffic sign via image processing by said image processor of a region of interest of image data captured by said camera where a traffic sign may be present, enhances resolution of captured image data based at least in part on known traffic sign images to generate upscaled image data; wherein said control receives an output of a low resolution classifier that processes image data captured by said camera and receives an output of a high resolution classifier that processes the upscaled image data; and wherein said control compares the output of said low resolution classifier to the output of said high resolution classifier to determine the putatively detected traffic sign. - View Dependent Claims (14, 15)
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16. A vision system for a vehicle, said vision system comprising:
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a camera disposed at a vehicle and having a field of view exterior and forward of the vehicle, said camera capturing image data; a control disposed at the vehicle, wherein said control comprises an image processor operable to process image data captured by said camera; wherein said control putatively detects a traffic sign via image processing by said image processor of image data captured by said camera, a low resolution image traffic sign classifier that processes image data to provide a low resolution classification of the putatively detected traffic sign; wherein said control, responsive at least in part to the putative detection of the traffic sign, enhances resolution of captured image data based at least in part on known traffic sign images to generate upscaled image data; a high resolution image traffic sign classifier that processes the upscaled image data to provide a high resolution classification of the putatively detected traffic sign; and wherein, responsive to processing by said control of (i) captured image data, (ii) the low resolution classification provided by the low resolution image traffic sign classifier, (iii) the high resolution classification provided by the high resolution image traffic sign classifier, said control classifies the putatively detected traffic sign. - View Dependent Claims (17, 18, 19, 20)
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Specification