CN103647899A

CN103647899A - Traffic intelligent-camera snapshot system and snapshot method based on FPGA

Info

Publication number: CN103647899A
Application number: CN201310566902.7A
Authority: CN
Inventors: 戴林; 边伟; 王晓伟
Original assignee: Tianjin Tiandy Digital Technology Co Ltd
Current assignee: Tianjin Tiandy Digital Technology Co Ltd
Priority date: 2013-11-15
Filing date: 2013-11-15
Publication date: 2014-03-19

Abstract

The invention discloses a traffic intelligent-camera snapshot system and snapshot method based on an FPGA. Based on the prior system, an FPGA module is added in the system and specific algorithms which occupy large quantities of DSP resources are transplanted to the FPGA module to realize so that the algorithm processing capacity of the whole camera is improved. The system is capable of responding to different triggering signals in a real-time manner and enabling flash-light triggering signals in a real-time manner and locating the optimal frame data at the same time so that requirements for high instantaneity by traffic intelligent snapshot are met. The novel snapshot method solves problems that the prior traffic network intelligent integral cameras are incapable of accurate snapshot or synchronization with the flash light and improves the algorithm processing capability of the whole camera at the same time.

Description

Traffic intelligent video camera capturing system and grasp shoot method based on FPGA

Technical field

The present invention relates to traffic intelligent camcorder technology field, relate to a kind of traffic intelligent video camera capturing system and grasp shoot method based on FPGA.

Background technology

Transportation network Intelligent integrated video camera in the past, has the function of candid photograph, when there is various break in traffic rules and regulations phenomenon, produces and captures triggering signal, and at this moment camera response is captured signal, and current video requency frame data is processed and preserved.When under Night, the operation of this candid photograph will coordinate photoflash lamp to use together, thus in moment flashily, can only produce the video requency frame data of an optimum efficiency, so be accurately positioned with very high requirement to what capture Frame under this pattern.Method is in the past by scheduler task, to be responded triggering signal and driven blinker signal under operating system.This method is easy to occur capturing inaccurate problem when cpu busy, is even difficult to navigate to optimum data frame.

Transportation network Intelligent integrated video camera is all to do Algorithm Analysis by DSP, as car plate location, and car plate identification, image effect optimization etc.When algorithm is too complicated, there will be the disposal ability of DSP inadequate.

Summary of the invention

The present invention is exactly in order to solve above-mentioned the problems of the prior art, and a kind of traffic intelligent video camera capturing system and grasp shoot method based on FPGA is provided.

In order to achieve the above object, the present invention adopts following technical scheme:

Traffic intelligent video camera capturing system based on FPGA of the present invention, comprises the FPGA module being connected with DSP processing module, by FPGA, realizes Video processing, comprises automatic exposure, Automatic white balance, and auto iris regulates; In FPGA module, be provided with the ISP video processing module realizing video data ISP and process, to view data carry out various algorithm process FPGA algorithm processing module, Bayer form is changed into the Data Format Transform module of rgb format and captures frame data sending module; In DSP processing module, comprise and capture frame data receiver module, JPEG compression module and DSP algorithm processing module.

FPGA module is provided with photoflash lamp enable port and triggering signal interface, by FPGA module, to transit equipment, sent enable signal and realize the response of capturing triggering signal, photoflash lamp enable port and triggering signal interface are UART(Universal Asynchronous Receiver/Transmitter-universal asynchronous receiving-transmitting transmitter)/GPIO(General Purpose Input Output-universal input/output)/SPI(Serial Peripheral Interface--Serial Peripheral Interface (SPI)).

A traffic intelligent video camera grasp shoot method based on FPGA, comprises the steps:

Video data from the Bayer form of video camera enters into FPGA, through Data Format Transform module, change into rgb format, by data by Memory Interface controller(memory i/f controller) deposit DDR(Double Data Rate synchronous DRAM in) in;

By GPIO mode, respond the triggering signal from transit equipment, and from the triggering signal of DSP processing module, receive triggering signal rear drive photoflash lamp enable port, internal logic obtains candid photograph frame data, FPGA algorithm processing module is carried out corresponding algorithm process to capturing frame, after processing, by capturing frame data sending module, data is exported to DSP processing module;

Candid photograph frame data receiver module in DSP processing module receives after data, by JPEG compression module, is realized capturing JPEG compression and the Internet Transmission of frame; Algorithm processing module in DSP processing module realizes the analysis to frame of video, according to analysis result, produces corresponding triggering signal.

Advantage and good effect that the present invention has are:

Traffic intelligent video camera capturing system based on FPGA of the present invention, in system in the past, increased FPGA module, some are taken to algorithm that DSP resource is many is transplanted in FPGA module and realizes, improved the algorithm process ability of whole camera, this system can be real-time the various triggering signals of response, and can be real-time enable photoflash lamp triggering signal, navigate to optimum frame data simultaneously and met traffic intelligent and capture the requirement high to real-time.This new grasp shoot method has solved the problem that transportation network Intelligent integrated video camera cannot accurately be captured, cannot synchronize with photoflash lamp in the past, has improved the ability of whole video camera algorithm process simultaneously.

Accompanying drawing explanation

Fig. 1 is the structured flowchart of the traffic intelligent video camera capturing system based on FPGA of the present invention.

Embodiment

Below in conjunction with the drawings and specific embodiments, traffic intelligent video camera capturing system and the grasp shoot method based on FPGA of the present invention is described further.Following each embodiment is not only limitation of the present invention for the present invention is described.

Fig. 1 is the structured flowchart of the traffic intelligent video camera capturing system based on FPGA of the present invention.As shown in Figure 1, the traffic intelligent video camera capturing system based on FPGA of the present invention, comprises the FPGA module being connected with DSP processing module, by FPGA module, realizes Video processing, comprises automatic exposure, Automatic white balance, and auto iris regulates; In FPGA module, be provided with the ISP video processing module realizing video data ISP and process, to view data carry out various algorithm process FPGA algorithm processing module, Bayer form is changed into the Data Format Transform module of rgb format and captures frame data sending module; In DSP processing module, comprise and capture frame data receiver module, JPEG compression module and DSP algorithm processing module.

FPGA module is provided with photoflash lamp enable port and triggering signal interface, by FPGA module, to transit equipment, is sent enable signal and realizes the response of capturing triggering signal, and photoflash lamp enable port and triggering signal interface are UART/GPIO/SPI.

This system is responded and is captured triggering signal by FPGA, realizes the ISP function of video data by FPGA, by FPGA, realizes video data format conversion, by FPGA, realizes video data buffer memory, by FPGA, realizes the various algorithm process of view data.

The algoritic module of realizing based on FPGA, can realize the parallel processing algorithm that some applicable hardware logics are realized, and the view data after algorithm process is exported by data-interface.

The present invention uses FPGA to realize candid photograph and the processing of transportation network Intelligent integrated video camera, comprise the response of various candid photograph signals and enabling of output signal, in FPGA, realize the processing of some still images, improved the algorithm process ability of whole camera, the real-time various triggering signals of response of this system energy, and can be real-time enable photoflash lamp triggering signal, navigate to optimum frame data simultaneously and met traffic intelligent and capture the requirement high to real-time.

Traffic intelligent video camera grasp shoot method based on FPGA of the present invention, comprises the steps:

Video data from the Bayer form of video camera enters into FPGA, through Data Format Transform module, changes into rgb format, and data are deposited in DDR by Memory Interface controller;

The method has solved the problem that transportation network Intelligent integrated video camera cannot accurately be captured in the past, and the problem that cannot synchronize with photoflash lamp has also improved the ability of whole video camera algorithm process simultaneously.

Claims

1. the traffic intelligent video camera capturing system based on FPGA, is characterized in that: this system comprises the FPGA module being connected with DSP processing module, by FPGA, realizes Video processing, comprises automatic exposure, Automatic white balance, and auto iris regulates; In FPGA module, be provided with the ISP video processing module realizing video data and process, to view data carry out various algorithm process FPGA algorithm processing module, Bayer form is changed into the Data Format Transform module of rgb format and captures frame data sending module; In DSP processing module, comprise and capture frame data receiver module, JPEG compression module and DSP algorithm processing module.

2. the traffic intelligent video camera capturing system based on FPGA according to claim 1, it is characterized in that: FPGA module is provided with photoflash lamp enable port and triggering signal interface, by FPGA module, to transit equipment, sent enable signal and realize the response of capturing triggering signal, photoflash lamp enable port and triggering signal interface are UART/GPIO/SPI.

3. the traffic intelligent video camera grasp shoot method based on FPGA, is characterized in that: the method comprises the steps:

Video data from the Bayer form of video camera enters into FPGA, through Data Format Transform module, changes into rgb format, and data are deposited in DDR by memory i/f controller;