Vehicle speed assessment system and method
First Claim
Patent Images
1. A method of assessing the speed of a vehicle including the steps of:
- obtaining a first image of a vehicle;
obtaining a second image of the vehicle captured at a known time after capture of the first image;
selecting a reference point on the vehicle in the first image; and
indicating a location in the second image corresponding to a predicted location of the selected vehicle reference point assuming that the vehicle travels at a particular speed between the times of capture of the first and second images.
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Abstract
A method of assessing the speed of a vehicle including the steps of obtaining a first image of a vehicle; obtaining a second image of the vehicle captured at a known time after capture of the first image; selecting a reference point on the vehicle in the first image; and indicating a location in the second image corresponding to a predicted location of the selected vehicle reference point assuming that the vehicle travels at a particular speed between the times of capture of the first and second images.
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Citations
31 Claims
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1. A method of assessing the speed of a vehicle including the steps of:
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obtaining a first image of a vehicle; obtaining a second image of the vehicle captured at a known time after capture of the first image; selecting a reference point on the vehicle in the first image; and indicating a location in the second image corresponding to a predicted location of the selected vehicle reference point assuming that the vehicle travels at a particular speed between the times of capture of the first and second images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. Vehicle speed assessment apparatus including:
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means for obtaining first and second images of a vehicle, said second image being captured a known time after said first image is captured; data processing means for noting a selected reference vehicle point in said first image, and for determining a location in said second image corresponding to a predicted location of the selected reference point assuming that said vehicle travels at a particular speed in the time period between the capturing of said first and second images. - View Dependent Claims (21, 22, 23, 24)
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25. A software product including:
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a component for obtaining a first image of a vehicle; a component for obtaining a second image of the vehicle captured a known time after capture of the first image; a component for selecting a vehicle reference point in the first image; and a component for indicating a location in the second image corresponding to a predicted location of the selected vehicle reference point assuming that the vehicle travels at a particular speed between the times when the first and second images are captured.
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26. A method of verifying the speed of a vehicle determined by a primary vehicle detection speed system, the method including the steps of:
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determining a primary speed assessment of a vehicle using a primary vehicle speed assessment method; determining whether said vehicle has violated a speed limit using said primary speed assessment; obtaining a first image of said vehicle that is determined to have violated said speed limit; obtaining a second image of said vehicle, said second image being captured a known time after the capture of said first image; selecting a vehicle reference point in said first image; indicating in said second image an expected position of said selected vehicle reference point assuming that said vehicle travels at said primary speed assessment between capture times of said first and second images; and determining whether an actual location of said vehicle reference point in said second image corresponds with said expected location of the vehicle reference point.
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27. A method of assessing the speed of a vehicle, the method including the steps of:
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obtaining a first image of a vehicle; obtaining a second image of said vehicle captured a known time after said first image is captured; selecting a vehicle reference point in said first image; indicating in said second image a plurality of speed markers, each corresponding to a predicted location of said selected vehicle reference point assuming that said vehicle travels at a particular speed between capture times associated with said first and second images; and determining a speed for said vehicle based on a comparison of an actual location of said selected vehicle reference point in said second image with said speed markers.
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28. A method of assessing vehicle speed, the method including the steps of:
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obtaining a first image of a vehicle; obtaining a second image of said vehicle captured a known time after the capture of said first image; noting the selecting of a vehicle reference point in said first image; displaying a movable marker in said second image corresponding to a predicted location of said selected vehicle reference point assuming that said vehicle travels at a particular speed; monitoring movement of said marker in the second image; and determining a speed associated with said marker based on a location of said marker in said second image.
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29. A method of assessing vehicle speed, the method including the steps of:
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obtaining a first image of a vehicle; obtaining further images of said vehicle known times after said first image; selecting a vehicle reference point in said first image; placing in said further images a marker corresponding to a predicted location of said selected vehicle reference point in said further images assuming that said vehicle travels at a particular speed between said images; and monitoring whether said markers track said selected vehicle reference point in said further images.
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- 30. A traffic violation image, a set of images, or video sequence showing a vehicle on a roadway, a vehicle reference point and a predicted location for the vehicle reference point assuming a particular vehicle speed.
Specification