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Vehicle video triggered equipment and method based on fast algorithm of locating license plate of vehicle

A license plate positioning and video technology, which is applied in the field of vehicle video triggering devices, can solve the problems of unchanged maintenance, false triggering, and destruction, and achieves the effect of small false triggering probability, overcoming the video false triggering phenomenon, and accurate positioning.

Inactive Publication Date: 2006-07-05
北京数字智通科技有限公司
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Problems solved by technology

However, external triggering devices often need to destroy the road surface for installation, and the deformation of the road surface leads to damage to the device, which brings many changes to maintenance, and its own infrared triggering and laser triggering technology has limitations, often accompanied by false triggering.
The video trigger device is a new technology in recent years. It adopts virtual coil technology. Its disadvantage is that it has poor environmental adaptability and is prone to false triggering due to light interference, such as light changes, other non-vehicle objects entering the field of view, etc. From the current From the perspective of practical application, the false trigger rate reaches about 30%, which is difficult to use

Method used

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  • Vehicle video triggered equipment and method based on fast algorithm of locating license plate of vehicle
  • Vehicle video triggered equipment and method based on fast algorithm of locating license plate of vehicle
  • Vehicle video triggered equipment and method based on fast algorithm of locating license plate of vehicle

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] exist figure 1 In the structural diagram of the video trigger device, the device of the present invention is composed of a digital video encoder, a first-in-first-out memory, a digital signal processor and a digital signal memory. The signal processor is connected; the digital signal processor is connected with the digital signal memory. The image acquisition control bus completes the control function of image acquisition from the digital signal processor to the first-in-first-out memory, and the digital signal processor runs the video trigger program.

[0019] exist figure 2 In the flow chart of the video trigger method, after the analog video signal field synchronization interrupt trigger occurs, the digital video encoder starts to collect the video image of the vehicle, when the line synchronization interrupt trigger occurs, the digital sig...

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Abstract

The method includes: the digital video encoder collects the video picture of vehicle, and saves it into FIFO memory; meanwhile the high speed digital signal processor scans and collects the data rows, and saves the feature point of each row; after scanning, the quick license plate location algorithm is used to make location for the license plate in term of the feature data; compares with the original image feature of the vehicle saved in FIFO memory to correctly locate the license plate, and further to trigger the video picture.

Description

technical field [0001] The invention relates to a vehicle video triggering device and method based on a fast license plate location algorithm, and belongs to the technical field of electrical communication in the Electrical Division of the International Patent Classification. Background technique [0002] With the rapid development of intelligent transportation technology, vehicle detection technology has been widely used in various fields of intelligent transportation system, such as urban checkpoints, highway tolls, urban road vehicle flow statistics, etc., currently mainly rely on external trigger devices and video Trigger device to realize vehicle detection. However, external triggering devices often need to destroy the road surface for installation, and the deformation of the road surface leads to damage to the device, which brings many changes to maintenance, and its own infrared triggering and laser triggering technology has limitations, often accompanied by false tri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18G06T1/00G08G1/017
Inventor 刘迎建晏峰高庆宏任子兴左中义曹海清褚晓玲
Owner 北京数字智通科技有限公司
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