Speed Calculation of a Moving Object based on Image Data
First Claim
1. A method for estimating speed of a moving object based upon a plurality of digital images comprising digital image data taken of the moving object from a substantially fixed position, where each image is captured at a different point in time, the method comprising:
- identifying digital image data associated with an attribute of the moving object from a first digital image;
identifying image data associated with the attribute of the moving object from a second digital image; and
determining the speed of the moving object based upon the digital data associated with the attribute from the first and second digital images and the associated capture times.
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Accused Products
Abstract
A method and system for estimating the average speed of a moving object based on an attribute of the moving object present within the captured image data is disclosed. A plurality of images of the moving object are recorded using an image sensor that senses the ambient light or other electromagnetic radiation reflected or emitted by the moving object. Each image is captured at a different capture time. The image sensor is preferably located at a fixed or substantially fixed location when imaging the moving object. An area of interest of the moving object is located within the image data of the first image. An attribute of the moving object is then calculated for the first image. For at least a second image, the same attribute is calculated for the same area of interest of the moving object. The attribute calculations for the first and at least second images are then used to determine the average speed of the moving object. The attribute may be the cross-sectional area of the area of interest of the moving object.
30 Citations
38 Claims
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1. A method for estimating speed of a moving object based upon a plurality of digital images comprising digital image data taken of the moving object from a substantially fixed position, where each image is captured at a different point in time, the method comprising:
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identifying digital image data associated with an attribute of the moving object from a first digital image; identifying image data associated with the attribute of the moving object from a second digital image; and determining the speed of the moving object based upon the digital data associated with the attribute from the first and second digital images and the associated capture times. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A computer program product including a non-transitory computer readable medium having computer code thereon for estimating the average speed of a moving object, the computer code comprising:
computer code for accessing a plurality of images of the moving object from a fixed position wherein each image is captured at a different capture time; for each image; computer code for selecting image data representative of the object; computer code for determining image data associated with an attribute of the object; and computer code for calculating a speed measurement of the moving vehicle based at least upon the image data associated with the attribute of the moving object for each image and the associated capture time. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for estimating the average speed of a moving object, the method comprising:
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recording digital image data representative of at least a selected portion of the object at a first time from a substantially fixed position; recording digital image data representative of at least the selected portion of the object at a second time from the substantially fixed position; determining a cross-sectional area based on the digital image data for the selected portion of the object at the first time and the second time; and calculating an average speed of the object based upon the determined cross-sectional area of the portion of the object and the associated capture times for the images. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification