System and method for recognizing railway temporary speed-limiting sign

Abstract

The invention discloses a system and a method for recognizing a railway temporary speed-limiting sign. The system comprises a video acquisition module, a video recognizing module, a control module, a display module and a voice prompting module. The video recognizing module comprises an image preprocessing submodule, a sign detection submodule, a character segmentation submodule and a character recognizing submodule. The system realizes the real-time speed-limiting sign recognition by recognizing and processing a multiframe image containing speed-limiting sign information in a video stream frame by frame and independent of single pictures, extracts a speed-limiting sign area by using an HIS space, improves the accuracy degree for recognition, further recognizes by carrying character segmentation on a yellow area and a green area, improves the speed of recognition, finally outputs a control instruction according to the recognition result, implements automatic control on the vehicle speed and simultaneously enables a driver to know the railway speed-limiting information in real time to reduce the probability of occurrence of accidents to be minimum.

Description

technical field [0001] The invention relates to the technical field of railway speed limit sign recognition, in particular to a railway temporary speed limit sign recognition system and method. Background technique [0002] The railway temporary speed limit sign is an important part of the railway traffic system, mainly including the deceleration signal and the terminal signal of the deceleration protection section. The deceleration signal is a yellow round plate during the daytime; at night it is a yellow light on the pillar. The deceleration signal board is black on a yellow background, and the black characters indicate the speed limit of the train. At the same time, according to the emergency braking distance of trains of different speed levels, special deceleration signal boards are added outside the original deceleration signal boards, which are yellow-backed black T-shaped round boards during the day and night. The terminal signal of the deceleration protection secti...

AI Technical Summary

Problems solved by technology

[0003] Due to the wide variety of traffic signs and complex graphics in the existing methods, the entire traffic sign is recognized. However, since the image area of ​​the entire traffic sign is relatively large, the amount of calculation will be much larger during recognition, which reduces the system cost. real-time

[0004] At the same time, most of the existing methods use black-and-white cameras to obtain grayscale images. Because the temporary speed limit signs of railways transmit different traffic information through different colors, such as yellow means entering the speed limit area, green means speed limit termination, Therefore existing methods are not suitable for railway traffic systems

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