Vehicle imaging system, vehicle imaging method and device, program, and recording medium
First Claim
1. A vehicle imaging device that detects a window of a vehicle utilizing a laser displacement sensor which emits a laser beam which scans a side of the vehicle in a height direction of the vehicle, receives a beam reflected by the vehicle, and measures a distance from the laser displacement sensor to a reflection point on the vehicle, at which the laser beam was reflected, wherein:
- the vehicle imaging device is configured to;
detect a candidate window of the vehicle based on a change in a distance from the laser displacement sensor to the reflection point;
verify whether a predetermined determination condition is satisfied for the candidate window;
when the determination condition has been continued over a predetermined time, determine the candidate window of the vehicle is a window of the vehicle, andsend a trigger for imaging to a camera when the window of the vehicle has been detected, whereinthe determination condition for the verifying process is whether or not (i) the position of the candidate window in the vertical direction is greater than or equal to a first threshold and also less than or equal to a second threshold, and (ii) the size of the candidate window in the vertical direction is greater than or equal to a predetermined width.
1 Assignment
0 Petitions
Accused Products
Abstract
A system includes a laser displacement sensor which is provided on a shoulder of a roadway, emits a laser beam which scans a roadway space in a height direction thereof, receives a beam reflected by an object which is present in the roadway space, and measures a distance up to a reflection point on the object, at which the laser beam was reflected; and a vehicle window detection device that detects a window of the vehicle based on the distance measured by the laser displacement sensor. The vehicle window detection device detects the window of the vehicle based on a change in a distance in a horizontal direction from the laser displacement sensor to the reflection point after the vehicle in the roadway space was detected.
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Citations
10 Claims
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1. A vehicle imaging device that detects a window of a vehicle utilizing a laser displacement sensor which emits a laser beam which scans a side of the vehicle in a height direction of the vehicle, receives a beam reflected by the vehicle, and measures a distance from the laser displacement sensor to a reflection point on the vehicle, at which the laser beam was reflected, wherein:
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the vehicle imaging device is configured to; detect a candidate window of the vehicle based on a change in a distance from the laser displacement sensor to the reflection point; verify whether a predetermined determination condition is satisfied for the candidate window; when the determination condition has been continued over a predetermined time, determine the candidate window of the vehicle is a window of the vehicle, and send a trigger for imaging to a camera when the window of the vehicle has been detected, wherein the determination condition for the verifying process is whether or not (i) the position of the candidate window in the vertical direction is greater than or equal to a first threshold and also less than or equal to a second threshold, and (ii) the size of the candidate window in the vertical direction is greater than or equal to a predetermined width. - View Dependent Claims (2, 3)
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4. A vehicle imaging method utilizing a laser displacement sensor which emits a laser beam which scans a side of the vehicle in a height direction of the vehicle, receives a beam reflected by the vehicle, and measures a distance from the laser displacement sensor to a reflection point on the vehicle, at which the laser beam was reflected,
the method comprising: -
detecting a candidate window of the vehicle based on a change in a distance from the laser displacement sensor to the reflection point; verifying whether a predetermined determination condition is satisfied for the candidate window; when the determination condition has been continued over a predetermined time, determining the candidate window of the vehicle to a window of the vehicle, and sending a trigger for imaging to a camera when the window of the vehicle has been detected, wherein the determination condition for the verifying process is whether or not (i) the position of the candidate window in the vertical direction is greater than or equal to a first threshold and also less than or equal to a second threshold, and (ii) the size of the candidate window of the vehicle in the vertical direction is greater than or equal to a predetermined width. - View Dependent Claims (5, 6)
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7. A non-statutory recording medium that stores a program which makes a computer execute functions of:
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detecting a window candidate of a vehicle utilizing a laser displacement sensor which emits a laser beam which scans a side of the vehicle in a height direction of the vehicle, receives a beam reflected by the vehicle, and measures a distance from the laser displacement sensor to a reflection point on the vehicle, at which the laser beam was reflected; verifying whether a predetermined determination condition is satisfied for the candidate window; when the determination condition has been continued over a predetermined time, determining the candidate window of the vehicle is a window of the vehicle, and sending a trigger for imaging to a camera, that images the vehicle, when the window of the vehicle has been detected, wherein the determination condition for the verifying process is whether or not (i) the position of the candidate window in the vertical direction is greater than or equal to a first threshold and also less than or equal to a second threshold, and (ii) the size of the candidate window in the vertical direction is greater than or equal to a predetermined width. - View Dependent Claims (8, 9)
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10. A vehicle imaging system comprising:
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a camera that images a vehicle; a laser displacement sensor which emits a laser beam which scans a roadway space in a height direction thereof, receives a beam reflected by an object which is present in the roadway space, and measures a distance up to a reflection point on the object, at which the laser beam was reflected; and a vehicle imaging device;
whereinthe vehicle imaging device is configured to; detect a candidate window of the vehicle based on a change in a distance from the laser displacement sensor to the reflection point; verify whether a predetermined determination condition is satisfied for the candidate window; when the determination condition has been continued over a predetermined time, determine the candidate window of the vehicle is a window of the vehicle, and send a trigger for imaging to a camera when the window of the vehicle has been detected, wherein the determination condition for the verifying process is whether or not (i) the position of the candidate window in the vertical direction is greater than or equal to a first threshold and also less than or equal to a second threshold, and (ii) the size of the candidate window in the vertical direction is greater than or equal to a predetermined width.
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Specification