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A method for converting a two-dimensional image into a three-dimensional point cloud

A technology of 3D point cloud and 2D image, applied in image data processing, graphic image conversion, instrument and other directions, can solve problems such as distortion and error

Inactive Publication Date: 2019-03-22
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the point cloud acquired by the rotary-scan 3D laser scanner, this projection method will produce huge distortion and errors, that is, the point cloud cannot be projected into a 2D image with maximum accuracy.

Method used

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  • A method for converting a two-dimensional image into a three-dimensional point cloud
  • A method for converting a two-dimensional image into a three-dimensional point cloud
  • A method for converting a two-dimensional image into a three-dimensional point cloud

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described in more detail below in conjunction with specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] refer to figure 1 , figure 1 It is a schematic flowchart of a method for converting a 3D point cloud into a 2D image provided by the present invention. The steps of the method include:

[0032] S110: Obtain 3D point cloud information of the object to be measured by using a 3D laser scanning device, establish a 3D Cartesian coordinate system with the 3D scanning device as a coordinate center, and calibrate the Cartesian coordinates of each point in the 3D point cloud.

[0033] In the present invention, ...

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Abstract

The invention discloses a method for converting three-dimensional point cloud into two-dimensional image, which comprises the following steps: acquiring three-dimensional point cloud information of anobject to be measured by a three-dimensional laser scanning device, taking the three-dimensional scanning device as a coordinate center, establishing a three-dimensional Cartesian coordinate system,and calibrating the Cartesian coordinates of each point in the three-dimensional point cloud; Taking three-dimensional scanning equipment as coordinate center, establishing the three-dimensional cylindrical coordinate system, and establishing the transformation relationship between Cartesian coordinates and cylindrical coordinates of each point in three-dimensional point cloud, and correpsoondingthe three-dimensional point cloud in Cartesian space coordinate system to the cylindrical coordinate system. Expanding The cylindrical coordinates of the three-dimensional cylindrical coordinate system to construct a two-dimensional cylindrical coordinate system, and the conversion relationship between the cylindrical coordinates of each point in the three-dimensional point cloud and establishingthe cylindrical coordinates of the two-dimensional cylindrical coordinate system , and enabling the three-dimensional point cloud in the cylindrical coordinate system to corresponded to the two-dimensional cylindrical coordinate system to generate the two-dimensional pixel coordinates of the object to be measured. The invention can convert the scanned three-dimensional point cloud into two-dimensional image for research, and simplifies the calculation process.

Description

technical field [0001] The invention relates to the field of image conversion, in particular to a method for converting a two-dimensional image from a three-dimensional point cloud. Background technique [0002] At present, the three-dimensional scanning technology has been perfected day by day, and its application has achieved remarkable results in various industries. It can obtain the three-dimensional geometric feature information of the surface of the ground object, and detect the geometric deformation of the surface of the ground object. If the point cloud is converted into a two-dimensional image, it can also be fused with two-dimensional data obtained by other sensors for more in-depth research. To convert a 3D point cloud into a 2D image, the current main methods are vertical projection and perspective projection. However, for the point cloud acquired by the rotary-scan 3D laser scanner, this projection method will produce huge distortion and errors, that is, the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00
CPCG06T3/06
Inventor 张晓王乙惠梁雅祺刘文静
Owner TAIYUAN UNIV OF TECH
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