Image processor-combined algorithm for speed restriction board detection during automatic driving

A graphics processor and automatic driving technology, applied in the direction of instruments, calculations, computer parts, etc., can solve the problems of difficult modification to parallel operation mode, time-consuming color extraction and contour extraction, etc., to achieve short development cycle and easy maintenance , the effect of improving the detection rate

Active Publication Date: 2016-06-29
WUHAN KOTEI TECH CORP
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Problems solved by technology

Both color extraction and contour extraction are time-consuming
Moreover, the contour extraction algorithm is a recursive algorithm, and it is not easy to modify i

Method used

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  • Image processor-combined algorithm for speed restriction board detection during automatic driving
  • Image processor-combined algorithm for speed restriction board detection during automatic driving
  • Image processor-combined algorithm for speed restriction board detection during automatic driving

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Embodiment Construction

[0016] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the invention.

[0017] Such as figure 1 As shown, the embodiment of the present invention provides an algorithm for speed limit plate detection in combination with a graphics processor in automatic driving, and an algorithm for speed limit plate detection in combination with a graphics processor in the automatic driving includes the following steps:

[0018] S1. Receive the video image acquired by the vehicle camera, and upload the received video image to the graphics processor;

[0019] S2. On the graphics processor, perform binary analysis and extraction on the red area in the video image, and perf...

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Abstract

The invention provides an image processor-combined algorithm for speed restriction board detection during automatic driving. An image with the resolution of 1600*1200 is reduced to an image with the resolution of 1200*900, and a red image with a similar red color as a speed restriction board is obtained by means of CUDA C language on a CPU and is given back to the CPU. A connected-component analysis algorithm is used to obtain information of each connected component, such as the position. Then, on the original color image with the resolution of 1600*1200, a judgment is made whether each connected component is a speed restriction board or not, by means of a support vector machine classifier. Finally, positions and pixel sizes of all speed restriction boards in the original image with the resolution of 1600*1200 are obtained. The invention proposes that a part of steps of the detection algorithm, where parallel computing is easy, are executed on the CPU, and in combination with calculation advantages of a central processing unit and an image processor, serial and parallel computing is carried out at the same time, thereby improving the speed restriction board detection rate and the speed restriction board detection speed. The algorithm of the invention has the advantages of high running frame rate, short development cycle, easy understanding and convenient maintenance.

Description

technical field [0001] The invention relates to the field of traffic information detection in the automatic driving industry, in particular to an algorithm for detecting speed limit signs in combination with a graphics processor in automatic driving. Background technique [0002] With the development of computer science and robotics, self-driving vehicles have been widely used in military, civil and scientific research, etc., and it has concentrated the latest research results of multiple disciplines such as structure, electronics, cybernetics and artificial intelligence. ,have a broad vision of application. [0003] In the development of unmanned driving technology, the speed limit plate detection algorithm is a relatively time-consuming algorithm, which needs to process the image pixel by pixel. Both color extraction and contour extraction are time-consuming. Moreover, the contour extraction algorithm is a recursive algorithm, and it is not easy to modify it into a paral...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/46
CPCG06V20/582G06V10/56
Inventor 苏晓聪陈波朱敦尧
Owner WUHAN KOTEI TECH CORP
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