从可见光岩体图像中识别和标记多裂缝的多尺度方法

IF 8.2 1区 工程技术 Q1 ENGINEERING, CIVIL
Yongbo Pan , Junzhi Cui , Zhenhao Xu
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引用次数: 0

摘要

多形态断裂对岩体的力学性能有直接影响。为了准确识别多尺度裂缝,需要总结裂缝灰度分布模式及其邻域的差异特征。在此基础上,提出了一种多尺度处理算法。多尺度处理过程如下。在像素邻域上,利用双线性插值构建灰度连续函数,通过高斯局部滤波实现灰度函数的平滑化,并计算出高精度的灰度梯度和赫塞斯矩阵。在小尺度图块上,通过自适应设置灰度阈值对像素进行分类,以识别潜在的线段和微型填充。在全局图像上,通过逐层推进区块边界,将潜在线段和微型填充物拼接在一起,以识别和标记多形态断裂。通过构建灰度连续函数和自适应设置小尺度块的灰度阈值,提高了识别多形态断裂的精度。逐层拼接算法仅在 2 层小尺度区块的域上执行,降低了复杂性。以不同断裂类型的岩体图像为例,识别结果表明所提出的算法能够准确识别多形态断裂,为计算岩体力学参数奠定了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multiscale method for identifying and marking the multiform fractures from visible-light rock-mass images

Multiform fractures have a direct impact on the mechanical performance of rock masses. To accurately identify multiform fractures, the distribution patterns of grayscale and the differential features of fractures in their neighborhoods are summarized. Based on this, a multiscale processing algorithm is proposed. The multiscale process is as follows. On the neighborhood of pixels, a grayscale continuous function is constructed using bilinear interpolation, the smoothing of the grayscale function is realized by Gaussian local filtering, and the grayscale gradient and Hessian matrix are calculated with high accuracy. On small-scale blocks, the pixels are classified by adaptively setting the grayscale threshold to identify potential line segments and mini-fillings. On the global image, potential line segments and mini-fillings are spliced together by progressing the block frontier layer-by-layer to identify and mark multiform fractures. The accuracy of identifying multiform fractures is improved by constructing a grayscale continuous function and adaptively setting the grayscale thresholds on small-scale blocks. And the layer-by-layer splicing algorithm is performed only on the domain of the 2-layer small-scale blocks, reducing the complexity. By using rock mass images with different fracture types as examples, the identification results show that the proposed algorithm can accurately identify the multiform fractures, which lays the foundation for calculating the mechanical parameters of rock masses.

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来源期刊
Underground Space
Underground Space ENGINEERING, CIVIL-
CiteScore
10.20
自引率
14.10%
发文量
71
审稿时长
63 days
期刊介绍: Underground Space is an open access international journal without article processing charges (APC) committed to serving as a scientific forum for researchers and practitioners in the field of underground engineering. The journal welcomes manuscripts that deal with original theories, methods, technologies, and important applications throughout the life-cycle of underground projects, including planning, design, operation and maintenance, disaster prevention, and demolition. The journal is particularly interested in manuscripts related to the latest development of smart underground engineering from the perspectives of resilience, resources saving, environmental friendliness, humanity, and artificial intelligence. The manuscripts are expected to have significant innovation and potential impact in the field of underground engineering, and should have clear association with or application in underground projects.
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