Lane line fast detection method based on improved Hough transform

A detection method and technology of lane lines, applied in the field of lane lines, can solve the problems of low detection efficiency, high detection cost of 320M dual-frequency depth sounder method, and large test error of head boat method, and achieve strong anti-interference ability and improved The ability of the system to resist interference and noise, and the effect of fast detection speed

Inactive Publication Date: 2014-09-24
GUANGDONG UNIV OF TECH
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Problems solved by technology

The Luoyang shovel method is prone to shedding of soil samples, and the detection efficiency is low; the test error o

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  • Lane line fast detection method based on improved Hough transform

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Embodiment Construction

[0025] Such as figure 1 As shown, the present invention is based on an improved Hough The lane line fast detection method of transformation, its specific operation steps are as follows:

[0026] 1) Use the improved median filtering algorithm to filter the current image.

[0027] 2) The image is evenly divided into 15 parts in the horizontal direction, and then evenly divided into 10 parts in the vertical direction. The coordinate ranges of these areas are calculated respectively.

[0028] 3) Use 45 degrees and 135 degrees Sobel The operator performs edge detection and binarization on each block image separately, and then combines them together.

[0029] 4) Divide the entire image into left and right parts from the middle position of the image (the left and right operations are similar, only the left lane line extraction process is described here). Take 8 groups of evenly spaced rays to detect to the left, and save the coordinates of the first detected white pixel. These...

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Abstract

The invention discloses a lane line fast detection method based on Hough transform. The method comprises the following steps: the image preprocessing step and the lane line extraction step. In the image preprocessing step, at first, image noise is eliminated through improved median filtering; and then, edge detection is performed through 45-angle and 135-angle Sobel operators; and finally, the lane line is segmented through the OTSU method. In the lane line extraction method, the lane line angle range is detected at the first frame to reduce the Hough space search range; in the subsequent frame detection, search is performed near the previous frame of frame lane line image space and the parameter space at first, and if no lane line is detected or the parameter difference is large, then the search range is expanded. According to the method, the lane line recognition speed can be quickened, and the system anti-interference capability can be improved.

Description

technical field [0001] The present invention relates to using the knowledge of image processing to quickly detect lane lines in video images, in particular to a method based on Hough A fast detection method for lane markings. Background technique [0002] The excavation of foundation trenches in water is often encountered in projects such as ports and waterways. Excavation of foundation trenches in water needs to detect whether the soil quality at the bottom of the foundation trenches meets the design requirements. Common detection methods include Luoyang shovel method, grab boat sampling method, and 320M dual-frequency depth sounder method. The Luoyang shovel method is prone to shedding of soil samples, and the detection efficiency is low; the test error of the head boat method is relatively large; the detection cost of the 320M dual-frequency depth sounder method is high. [0003] With the continuous improvement of the automation level of the manufacturing industry, the ...

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Application Information

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IPC IPC(8): G06K9/00G06K9/46
Inventor 蔡延光黄刚蔡颢汤雅连
Owner GUANGDONG UNIV OF TECH
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