Vehicle classification by image processing with laser range finder
First Claim
1. A system for image based vehicle classification, the system comprising:
- an image capture device configured to digitally capture a plurality of images wherein each of the plurality of images includes representations of a plurality of moving objects moving with respect to a substantially stationary background and wherein at least one representation of the plurality of moving objects is a representation of a vehicle;
a rangefinder device configured to determine distance between the vehicle and the image capture device; and
a processor, communicatively coupled to the image capture device and to the rangefinder device, configured to;
extract the representation of the vehicle from the plurality of images,convert image data associated with the representation of the vehicle to a set of physical dimensions associated with the vehicle, andclassify the vehicle based on the set of physical dimensions associated with the vehicle.
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Abstract
An image capture device captures a plurality of sequential images of a vehicle in motion. At substantially the same time a collocated rangefinder determines the distance between the vehicle and the image capture device. Each of the plurality of images may be segmented based on the rangefinder point of reference. The portion of each image representing the vehicle is extracted based on its motion with respect to a stationary background. Knowing the size of the vehicle with respect to the image and the distance that the vehicle is from the image capture device, the image data is converted to real world dimensions. Using these real world dimensions a vehicle classification is determined.
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Citations
30 Claims
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1. A system for image based vehicle classification, the system comprising:
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an image capture device configured to digitally capture a plurality of images wherein each of the plurality of images includes representations of a plurality of moving objects moving with respect to a substantially stationary background and wherein at least one representation of the plurality of moving objects is a representation of a vehicle; a rangefinder device configured to determine distance between the vehicle and the image capture device; and a processor, communicatively coupled to the image capture device and to the rangefinder device, configured to; extract the representation of the vehicle from the plurality of images, convert image data associated with the representation of the vehicle to a set of physical dimensions associated with the vehicle, and classify the vehicle based on the set of physical dimensions associated with the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for image based vehicle classification, said method comprising:
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capturing digitally a plurality of images using an image capture device wherein each of the plurality of images includes a plurality of moving objects images moving with respect to a substantially stationary background and wherein at least one of the plurality of moving objects images is a vehicle image that is associated with a vehicle; determining a distance between the vehicle and the image capture device; extracting the vehicle image from the plurality of images; converting data associated with the vehicle image to a set of physical dimensions associated with the vehicle; and classifying the vehicle based on the set of physical dimensions associated with the vehicle. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer-readable storage medium tangibly embodying a program of instructions executable by a processor wherein said program of instructions comprises a plurality of program codes for image based vehicle classification said program of instructions comprising:
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one of said program codes for retrieving from an image collection device a plurality of images wherein each of the plurality of images includes a plurality of moving objects images moving with respect to a substantially stationary background and wherein at least one of the plurality of moving objects images is a vehicle image that is associated with a vehicle; program code for communicating to the processor distance information between the image collection device and the vehicle as determined by a rangefinder device; program code for extracting the vehicle image from the plurality of images; program code for converting data associated with the vehicle image to a set of physical dimensions associated with the vehicle; and program code for classifying the vehicle based on the set of physical dimensions associated with the vehicle. - View Dependent Claims (22, 23, 24, 25)
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26. A portable image based classification device comprising:
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an image capture device for identification of at least one moving object with respect to a substantially stationary background; a rangefinder for determining a distance between said at least one moving object and the image capture device; and a processor operatively coupled to said image capture device and said rangefinder, wherein said processor is operative to distinguish said at least one moving object from said stationary background, convert image data associated with said at least one moving object to actual physical dimensions of said at least one moving object and classify said at least one moving object based upon said actual physical dimensions. - View Dependent Claims (27, 28, 29, 30)
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Specification