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Three-dimensional reconstruction method for concrete CT (computed tomography) image

A technology of three-dimensional reconstruction and CT image, which is applied in the field of concrete CT image processing, can solve the problems of large amount of data, relatively high memory requirements, slow drawing speed, etc., and achieve the effect of strong real-time performance and high computing efficiency

Inactive Publication Date: 2012-07-25
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY +1
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Problems solved by technology

[0004] The image drawn by the ray casting method is of high quality and the effect is very good, but this method has a big problem, that is, the amount of data processed is relatively large, and the memory requirements are relatively high, because each ray needs to be resampled calculation, so the drawing speed is relatively slow

Method used

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  • Three-dimensional reconstruction method for concrete CT (computed tomography) image
  • Three-dimensional reconstruction method for concrete CT (computed tomography) image
  • Three-dimensional reconstruction method for concrete CT (computed tomography) image

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Embodiment Construction

[0036] The concrete image reconstruction method of the present invention, such as figure 1 As shown, the method includes:

[0037] The first step is to use medical CT or industrial CT to scan the section of the concrete specimen to obtain the two-dimensional tomographic image data of the static compression CT image of the concrete;

[0038] The second step is to use the three-dimensional reconstruction visualization technology to perform three-dimensional reconstruction on the concrete static compression CT two-dimensional tomographic image to generate a three-dimensional display image; the specific method is as follows:

[0039] Use the three-dimensional reconstruction visualization technology to reconstruct the two-dimensional tomographic image of the concrete CT, and use the ray projection algorithm to emit a ray from each pixel on the concrete static compression CT two-dimensional screen according to the direction of the set line of sight. Equidistant sampling is carried ...

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Abstract

The invention discloses a three-dimensional reconstruction method for a concrete CT (computed tomography) image, comprising the following steps of: firstly, performing tomography on a concrete test sample by a CT machine; secondly, performing three-dimensional reconstruction on the concrete CT image by using a ray-casting algorithm, so as to obtain real images of aggregates, mortar and holes; and finally, performing three-dimensional stereo reconstruction on the concrete CT image by using a visualization tool VTK (visualization tool kit). The three-dimensional reconstruction method for the concrete CT (computed tomography) image, disclosed by the invention, has the advantages of being strong in real-time performance, high in operation efficiency, and capable of clearly and reliably distinguishing the aggregates, the mortar and the holes. A real meso-structure model of concrete can be obtained through a three-dimensional reconstruction result, the three-dimensional reconstruction result can be subjected to a test comparison with a concrete mesoscopic numerical simulation result, and a numerical analysis model is corrected.

Description

technical field [0001] The invention relates to concrete CT image processing technology, in particular to a method for reconstructing a three-dimensional image of an object according to two-dimensional tomographic image data. Background technique [0002] Concrete is a heterogeneous material with a wide range of engineering applications. Heterogeneous composite material composed of coarse aggregate, fine aggregate, cement hydrate, unhydrated cement particles, pores and cracks. It is one of the deepest and most difficult topics in the research of concrete materials to study the effects of various spatial scale defects on the deformation, failure and stability of concrete materials, or the size of the effects. In recent years, the X-ray CT test of concrete has become a hot research topic on the mesoscopic cracking process of concrete and rock materials. The biggest advantage of X-ray CT observation of the crack evolution process of concrete lies in its non-destructive detecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
Inventor 赵亮李昌华党发宁陈登峰徐胜军王宏波
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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