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Method for splitting joint cracks in road rock slope image

A technology in images and rock masses, applied in image analysis, image data processing, image enhancement, etc., it can solve the problems of inaccurate calculation, no edge, no color characteristics, etc., and achieve the effect of accurate calculation results.

Inactive Publication Date: 2013-12-25
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing joint crack segmentation process is to convert the color image into a grayscale image according to the traditional conversion method; characteristics, the converted image is not accurate
At the same time, because the traditional method of calculating the fractal dimension does not consider the influence of the edge, the calculation is not very accurate

Method used

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  • Method for splitting joint cracks in road rock slope image
  • Method for splitting joint cracks in road rock slope image
  • Method for splitting joint cracks in road rock slope image

Examples

Experimental program
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Embodiment 1

[0090] Following the technical solution of the present invention, in this embodiment α=0.325, β=0.335, γ=0.340, i.e. I=0.325R+0.335G+0.340B, δ 1 = 3.5, δ 2 = 1.5. In this embodiment, the improved difference counting box dimension method is used to calculate the fractal dimension.

[0091] figure 2 (a) is the converted image with conventional formula I=0.11R+0.59G+0.30B; figure 2 (b) convert the image according to the formula determined according to the weights of the three colors of the image, the image conversion formula is I=0.325R+0.335G+0.340B; the R, G, B coefficients of the traditional color variable grayscale formula It is obtained based on empirical values ​​and is used for most of the images, but the present invention calculates the mean value of the histogram of the three components to obtain the coefficients of R, G, and B according to the characteristics of rock cracks, so that the obtained cracks are more clear.

Embodiment 2

[0093] The difference between this embodiment and Embodiment 1 is that the fractal dimension is calculated using the traditional method of difference counting box dimension.

[0094] image 3 (a) is the segmentation result of embodiment 2, image 3 (b) is the segmentation result of Example 1. The traditional difference counting box dimension method is to arrange grids sequentially on the (x, y) plane of the image. When the size of the image is not an integer multiple of the grid size, the grid size at the edge of the image will be smaller than s. The original solution is to put the image Add an edge, and set the gray value of the newly added edge to zero. This does not cause large errors when the image size is much larger than the maximum box size used. However, the extraction of joint cracks needs to be calculated on smaller image blocks, and the calculated fractal dimension will have a large error, which will affect the subsequent segmentation results. The improved metho...

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Abstract

The invention discloses a method for splitting joint cracks in a road rock slope image. The method comprises the steps that firstly, grey level transformation is conducted on the image; secondly, denoising is conducted on the grey level image; thirdly, the fractal dimension of an image block is calculated; finally, the fractal dimension serves as a textural feature, according to the textural feature, the textural feature distance between pixel points is defined, a region growing rule is defined based on the defined distance, the pixel point satisfying the growing rule serves as a pixel in a growing region until the point to be compared does not exist, and then image splitting is completed. The method for splitting the joint cracks enables a result to be accurate and reliable.

Description

technical field [0001] The invention relates to a method for segmenting cracks in rock images, in particular to a method for segmenting joint cracks in road rock slope images based on image technology. Background technique [0002] A joint is a crack in rock, a fractured structure with no apparent displacement. A large number of developed joints often cause rock mass instability, which brings hidden dangers and disasters to engineering construction. [0003] Joint cracks of highway slopes are one of the important factors affecting slope deformation and failure. In engineering construction, unfavorable geological phenomena such as landslides and collapses caused by joint cracks are not uncommon. However, since joint cracks are generally small structures with a small scale and localized distribution; at the same time, joint cracks develop and change with changing conditions, so their influence on the slope is also a process of continuous development. Poe's hazards are also o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/00
Inventor 王卫星韩亚刘晟李双
Owner CHANGAN UNIV