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Sand-dust geometrical characteristic extraction and three-dimensional reconstruction method based on image processing

A technology of three-dimensional reconstruction and geometric features, applied in image data processing, special data processing applications, 3D modeling, etc., can solve the problem of low accuracy of sand and dust three-dimensional models.

Active Publication Date: 2020-10-20
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0004] In order to overcome the defects and deficiencies of the existing technology and solve the problem of low accuracy of sand and dust three-dimensional model establishment, the present invention provides a method for extracting sand and dust geometric features and three-dimensional reconstruction based on image processing

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  • Sand-dust geometrical characteristic extraction and three-dimensional reconstruction method based on image processing

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Such as figure 1 As shown, a method for extracting geometric features of sand and dust based on image processing and three-dimensional reconstruction provided by the present invention includes the following steps:

[0038] (1) Cross-sectional image acquisition

[0039] Use a scanning electron microscope to collect cross-sectional images of sand and dust. The SEM image of sand and dust when it is not peeled off (ie the first layer) is as follows: figure 2 shown.

[0040] (2) Image preprocessing

[0041] In order to obtain the coordinates of the data points of the sand and dust cross-section profile, the threshold value processing is performed on the image to complete the binarization of the image. In order to accurately identify the sand and dust cross-section, it is necessary to remove the impurity pixels in the image. The implementation pro...

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Abstract

The invention discloses a sand-dust geometrical characteristic extraction and three-dimensional reconstruction method based on image processing. The method comprises the following steps: acquiring a cross-section image of a sand-dust sample based on a scanning electron microscope; carrying out threshold processing on the cross-section image of the sand-dust sample to obtain coordinates of sand-dust cross section contour data points; stripping the sample to obtain an image of a sand-dust fault section; in the sample preparation process, embedding precise steel balls into the surface of the sample, and determining the thickness of a stripping layer according to the sizes of the sections of the steel balls due to that when materials are removed, the sectional areas of the steel balls before and after stripping are changed; adjusting the positions of sands and dusts in the images of the sand-dust fault sections to ensure that the images of the fault sections are aligned, and carrying out interlayer interpolation on the images between the faults by adopting an interpolation method; and based on a moving cube algorithm, completing three-dimensional reconstruction of the sands and dusts according to a sectional image of the sands and dusts. The application of sand-dust erosion finite element simulation on weapon equipment parts can be promoted, and data support is provided for preparation and service life estimation of the hard coating.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional reconstruction of three-dimensional models, and in particular relates to a method for extracting geometric features of sand and dust based on image processing and three-dimensional reconstruction. Extraction of geometric feature contours of sand and dust. Using the layer-by-layer stripping method combined with the scanning electron microscope experiment, the cross-sectional images of the sand and dust were obtained, and the three-dimensional reconstruction of the sand and dust model was carried out using the moving cube algorithm. Background technique [0002] The service environment of sand and dust is an important factor that causes the failure of many military weapons and equipment. Sand and dust erosion have a serious impact on the safe service performance of helicopter components. If there is a fault, the consequences will be more serious. It is very difficult to observe the proces...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06T17/00
CPCG06F30/23G06T17/00Y02A90/10
Inventor 臧顺来颜雪源何光宇
Owner XI AN JIAOTONG UNIV
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