Lidar Management Device with Target Tracking and Method for Use of Same
First Claim
1. A method for operating a vehicular traffic surveillance Lidar measurement device, the method comprising:
- acquiring video with the Lidar measurement device of a first field of view having a first aspect ratio, the first field of view operably having a target therein, the video including an image of the target;
progressively repeatedly scanning a second field of view having a second aspect ratio with laser range-finding signals from the Lidar measurement device, the second field of view operably having the target therein and being substantially similar to the first field of view and being an identification space, the second aspect ratio being substantially similar to the first aspect ratio;
based on the progressive repeated scanning of the second field of view, identifying the target and a target space having the target therein;
progressively repeatedly scanning a third field of view having a second aspect ratio with laser range-finding signals from the Lidar measurement device, the third field of view being the target space, the third field of view being smaller than the second field of view, the portion of the identification space outside of the target space is not scanned;
during the progressive repeated scanning of the third field of view, receiving reflected laser range-finding signals from the target at the Lidar measurement device;
determining target data of the target based upon range and time measurements associated with the reflected laser range-finding signals; and
integrating the target data into the video such that speed measurement is associated with the image of the target.
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Accused Products
Abstract
A Lidar measurement device for vehicular traffic surveillance and method for use of same are disclosed. In one embodiment, video circuitry acquires video of a field of view having a target therein. A steerable laser progressively scans the field of view to identify targets. The steerable laser then progressively, repeatedly scans a sub-field of the field of view containing the target. A processing circuit portion determines target data of the target based upon range and time measurements associated with reflected laser range-finding signals from the scans of the sub-field. The processing circuit then integrates the target data into the video such that the video may displayed with an image of the target and target data, such as a speed measurement, associated therewith.
6 Citations
20 Claims
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1. A method for operating a vehicular traffic surveillance Lidar measurement device, the method comprising:
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acquiring video with the Lidar measurement device of a first field of view having a first aspect ratio, the first field of view operably having a target therein, the video including an image of the target; progressively repeatedly scanning a second field of view having a second aspect ratio with laser range-finding signals from the Lidar measurement device, the second field of view operably having the target therein and being substantially similar to the first field of view and being an identification space, the second aspect ratio being substantially similar to the first aspect ratio; based on the progressive repeated scanning of the second field of view, identifying the target and a target space having the target therein; progressively repeatedly scanning a third field of view having a second aspect ratio with laser range-finding signals from the Lidar measurement device, the third field of view being the target space, the third field of view being smaller than the second field of view, the portion of the identification space outside of the target space is not scanned; during the progressive repeated scanning of the third field of view, receiving reflected laser range-finding signals from the target at the Lidar measurement device; determining target data of the target based upon range and time measurements associated with the reflected laser range-finding signals; and integrating the target data into the video such that speed measurement is associated with the image of the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 20)
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13. A system for operating a vehicular traffic surveillance Lidar measurement device, the system comprising:
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means for acquiring video with the Lidar measurement device of a first field of view having a first aspect ratio, the first field of view operably having a target therein, the video including an image of the target; means for progressively repeatedly scanning a second field of view having a second aspect ratio with laser range-finding signals from the Lidar measurement device, the second field of view operably having the target therein and being substantially similar to the first field of view_and being an identification space, the second aspect ratio being substantially similar to the first aspect ratio; based on the progressive repeated scanning of the second field of view, means for identifying the target and a target space having the target therein; means for progressively repeatedly scanning a third field of view having a second aspect ratio with laser range-finding signals from the Lidar measurement device, the third field of view being the target space, the third field of view being smaller than the second field of view, the portion of the identification space outside of the target space is not scanned; during the progressive repeated scanning of the third field of view, means for receiving reflected laser range-finding signals from the target at the Lidar measurement device; means for determining target data of the target based upon range and time measurements associated with the reflected laser range-finding signals; and means for integrating the target data into the video such that speed measurement is associated with the image of the target. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification