FPGA-based traffic signal control machine for intersection queue length image detection

Abstract

The invention relates to field programmable gate array (FPGA)-based intersection queue length image detection and traffic signal control implementation, and belongs to signal processing technology, communication technology and traffic signal control technology. A digital image interested region is detected by using an FPGA chip on the basis of the conventional signal machine, and the queue length at a traffic intersection is extracted and a signal machine mainboard is communicated with an ARM7 processor so as to control a traffic signal lamp. The invention is characterized in that: an image processing algorithm circuit constructed by FPGA hardware logic analyzes and processes the acquired image signal, calculates the split green ratio according to the result and makes an image processing algorithm become hardware without a computer or a digital signal processor (DSP) and other core processors.

Description

technical field [0001] The invention relates to an FPGA-based intersection queuing length image detection and traffic signal control realization, which belongs to signal processing technology, communication technology and traffic signal control technology. On the basis of the existing signal machine, the FPGA chip is used to detect the area of ​​interest in the digital image, and the length of the fleet at the traffic intersection is extracted, and the ARM7 processor communicates with the signal machine main board to realize the control of the traffic signal light. Background technique [0002] Traffic signal control is the use of traffic signals to command and guide vehicles and pedestrians running on the road. Traffic signal automatic control is an important part of traffic control and an effective means of scientific traffic management. The controller, which is mainly used for the control of signal lights at intersections, can not only realize the control independently, b...

AI Technical Summary

Problems solved by technology

This implementation method is low in cost and high in reliability, but the real-time performance is relatively poor

The FPGA chip has the characteristics of fast hardware logic processing speed and can control the acquisition of images at high speed. However, it takes relatively more time for DSP to realize real-time processing of digital images. The mismatch between the two operating speeds has caused the processing of the entire system to low efficiency

In addition, the DSP chip also needs to realize the management of video acquisition, the processing of digital images and the control of RAM reading and writing, which leads to the fact that such systems are far from meeting the actual real-time requirements of the project.

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