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Method for constructing geological outcrop three-dimensional model based on digital single lens reflex camera

A technology of three-dimensional model and construction method, which is applied in the application field of three-dimensional visual geological modeling and three-dimensional model construction of geological outcrops, can solve the problems of complicated operation, failure to be widely used, and high price of three-dimensional laser scanners, etc. Not easy to carry

Inactive Publication Date: 2018-09-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

The current 3D modeling method for geological outcrops mainly uses 3D laser scanners to collect point cloud information (that is, spatial information) of geological outcrops, combined with SLR cameras to collect image data, and obtains 3D models of geological outcrops through fusion modeling of the two, but 3D laser scanning The instrument is expensive and complicated to operate, so it has not been widely used in geological surveys

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  • Method for constructing geological outcrop three-dimensional model based on digital single lens reflex camera
  • Method for constructing geological outcrop three-dimensional model based on digital single lens reflex camera
  • Method for constructing geological outcrop three-dimensional model based on digital single lens reflex camera

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Embodiment Construction

[0037] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments:

[0038] refer to figure 1 , the specific implementation steps of the present invention are:

[0039] (1) Set the scale mark point

[0040] Select geological outcrop feature points or set artificial markers as scale marking points, and their size should be greater than the minimum spatial resolution of the image to be collected to ensure that they can be clearly distinguished on the image. Set the scale marking points of the three specific conditions as A, B, and C, and use a steel ruler to accurately measure the distance between the marking points (in meters), and take the position to the full millimeter.

[0041] Among them, the scale identification points A, B, and C should be in the shape of an isosceles right triangle as ...

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Abstract

The invention discloses a method for constructing a geological outcrop three-dimensional model based on a digital single lens reflex camera. The method basically comprises the following steps: selecting a geological outcrop feature point or setting an artificial mark as a scale mark point; collecting a geological outcrop image by using a fixed focal length camera; performing aerial triangulation,automatically extracting the connection points, determining the image position by an inverse calculation of the connection point; adding model scale information; performing the aerial triangulation again; constructing an triangular irregular network through the connection points, generating a white body model, and performing image attaching to obtain a geological outcrop three-dimensional model; optimizing the model, filling the holes of the model and clipping the areas of non-interest, to achieve model optimization. The method provided by the invention has the advantages of being scientific and reasonable, easy to implement, high in precision, and the like, and uses the digital single lens reflex camera to perform image acquisition on the geological outcrop to construct the geological outcrop three-dimensional model.

Description

technical field [0001] The invention relates to the technical field of three-dimensional visualized geological modeling, in particular to the application field of building a three-dimensional model of a geological outcrop, in particular to a method for collecting geological outcrop images by a single-lens reflex camera and using the image data to construct a three-dimensional model of the geological outcrop. Background technique [0002] Geological outcrops are geological bodies exposed on the earth's surface. Studying the characteristics of geological outcrops is an important means to understand the geological conditions of underground reservoirs. As the goals of geological research tend to be more refined and complex, and the scale of geological body representation is getting smaller and smaller, the traditional method of geological outcrop investigation (taking photos with geological hammers and benchmarks as reference objects) is used to obtain geological body parameters ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/05G06T17/00
CPCG06T17/00G06T17/05
Inventor 刘善伟王朝冯建伟
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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