CN113205590A - Indoor three-dimensional modeling method and system based on oblique photography principle - Google Patents
Indoor three-dimensional modeling method and system based on oblique photography principle Download PDFInfo
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Abstract
The present disclosure provides an indoor three-dimensional modeling method and system based on oblique photography principle, the method comprises the following steps: acquiring indoor environment data to be modeled to obtain an oblique photography route; acquiring image data shot according to an oblique photography route and preprocessing the image data to obtain an oblique photography image coordinate; performing aerial triangulation according to the image coordinates of oblique photography and the coordinates of the indoor image control points, and correcting aerial triangulation results of oblique photography measurement; extracting connection points based on an aerial triangulation result, constructing an irregular triangulation network, and reconstructing a building model based on the irregular triangulation network to obtain an indoor three-dimensional model; the method and the device improve the empty three-processing result and improve the modeling precision of the indoor building by correcting the empty three-processing result of the oblique photography by means of the wall surface control point and the ground surface control point.
Description
Technical Field
The disclosure relates to the technical field of indoor three-dimensional modeling, in particular to an indoor three-dimensional modeling method and system based on an oblique photography principle.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the increasing demands of smart cities, cultural relic protection, disaster emergency response, indoor navigation, virtual reality and the like on indoor refined three-dimensional models, how to quickly and effectively acquire the indoor three-dimensional refined models becomes a research hotspot.
However, the inventor finds that the unmanned aerial vehicle oblique photography measurement mode cannot be directly used due to limited indoor space and complex and variable environment. At present, there are two ways in the process of constructing an indoor three-dimensional model: a worker refers to an original CAD drawing and models in professional modeling software; in the other mode, under the condition that an original CAD drawing does not exist, workers need to measure all details of the indoor building and then model in professional modeling software, and the two modes both need a large number of professional modeling workers and are low in efficiency and long in construction period.
Disclosure of Invention
In order to solve the defects of the prior art, the indoor three-dimensional modeling method and system based on the oblique photography principle are provided, an indoor three-dimensional model is built by using the oblique photography measurement principle, and the problems of low efficiency and long construction period of artificial indoor modeling are solved to a certain extent.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
the first aspect of the disclosure provides an indoor three-dimensional modeling method based on oblique photography principle.
An indoor three-dimensional modeling method based on oblique photography principle comprises the following steps:
acquiring indoor environment data to be modeled to obtain an oblique photography route;
acquiring image data shot according to an oblique photography route and preprocessing the image data to obtain an oblique photography image coordinate;
performing aerial triangulation according to the image coordinates of oblique photography and the coordinates of the indoor image control points, and correcting aerial triangulation results of oblique photography measurement;
and extracting connection points based on the aerial triangulation result, constructing an irregular triangulation network, and reconstructing a building model based on the irregular triangulation network to obtain an indoor three-dimensional model.
As some possible realization modes, the indoor image control points comprise a plurality of image control points positioned on the ground and image control points positioned on each wall surface.
As a further limitation, the same number of image control points are distributed on the wall surface and the ground surface.
As a further limitation, a plurality of image control points are uniformly distributed on the wall surface and the ground respectively, and the number of the image control points is distributed according to the area of the wall surface.
As some possible realization modes, the overlapping degree of the shot images on the oblique shooting route is more than or equal to 60%, and the shot images can cover the whole indoor space.
As some possible implementations, the image data is preprocessed, including: and removing the images with over exposure and imaging blur, and acquiring a complementary image at the position where the images are removed.
And as possible implementation modes, the distributed image control point coordinates are processed according to a required data format, and the processed image control point coordinates are used for correcting the aerial triangulation result of oblique photography.
A second aspect of the present disclosure provides an indoor three-dimensional modeling system based on oblique photography principles.
An indoor three-dimensional modeling system based on oblique photography principles, comprising:
a data acquisition module configured to: acquiring indoor environment data to be modeled to obtain an oblique photography route;
an image processing module configured to: acquiring image data shot according to an oblique photography route and preprocessing the image data to obtain an oblique photography image coordinate;
an aerial triangulation correction module configured to: performing aerial triangulation according to the image coordinates of oblique photography and the coordinates of the indoor image control points, and correcting aerial triangulation results of oblique photography measurement;
a three-dimensional model building module configured to: and extracting connection points based on the aerial triangulation result, constructing an irregular triangulation network, and reconstructing a building model based on the irregular triangulation network to obtain an indoor three-dimensional model.
A third aspect of the present disclosure provides a medium having stored thereon a program that, when executed by a processor, implements the steps in the oblique photography principle-based indoor three-dimensional modeling method according to the first aspect of the present disclosure.
A fourth aspect of the present disclosure provides an electronic device, comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor implements the steps of the oblique photography principle-based indoor three-dimensional modeling method according to the first aspect of the present disclosure when executing the program.
Compared with the prior art, the beneficial effect of this disclosure is:
1. according to the method, the system, the medium or the electronic equipment, the indoor three-dimensional model is constructed by using the oblique photogrammetry principle, the problems of low efficiency and long construction period of artificial indoor modeling are solved to a certain extent, the whole process does not need to manually measure indoor detail data of a building, the data acquisition process is simplified, the efficiency of indoor three-dimensional modeling is improved, and the construction period is greatly shortened.
2. The method, the system, the medium or the electronic equipment disclosed by the disclosure reduce the process of artificially measuring each detail of the indoor building, acquire the image of the indoor building by utilizing the oblique photography principle, and can obtain the three-dimensional model of the indoor building by virtue of the three-dimensional modeling system in a full-automatic and rapid manner, so that the modeling speed is high, and the construction period is short.
3. The method, the system, the medium or the electronic equipment corrects the space three results of oblique photography by means of the wall surface control points and the ground surface control points, improves the space three processing results and improves the indoor building modeling precision.
4. The method, the system, the medium or the electronic equipment can rapidly acquire all details of the indoor building in a large area by using the principle of oblique photography, improve the efficiency compared with manual measurement and obviously save the construction period.
5. The method, the system, the medium or the electronic equipment can be used for rapidly and automatically reconstructing the indoor building model by utilizing the full-automatic three-dimensional modeling system, so that the efficiency is improved, and the real situation of the texture of the building can be furthest reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic flowchart of an indoor three-dimensional modeling method based on oblique photography according to embodiment 1 of the present disclosure.
Fig. 2 is a schematic layout diagram of wall surface control points and ground control points in a survey area provided in embodiment 1 of the present disclosure.
Fig. 3 is a schematic view of a shooting route for oblique photography in a survey area according to embodiment 1 of the present disclosure.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
Example 1:
as shown in fig. 1, 2, and 3, an embodiment 1 of the present disclosure provides an indoor three-dimensional modeling method based on oblique photography principle, which performs image acquisition by using a camera to simulate oblique photography measurement, then performs matching and aerial triangulation on image data, and finally performs automatic indoor building model reconstruction by using a three-dimensional modeling system. The whole process does not need to manually measure the indoor detail data of the building, simplifies the data acquisition process, improves the efficiency of indoor three-dimensional modeling and greatly shortens the construction period.
Specifically, the method comprises the following steps:
s1: wall image control points and ground image control points are respectively arranged indoors, the wall image control points are uniformly distributed on each indoor wall surface, 4 points are distributed on each wall surface, and the ground image control points are uniformly distributed on the ground and 4 image control points are distributed.
It can be understood that if the indoor space is large, the number of the image control points can be increased according to actual conditions, and the specific number of the image control points can be set according to the area size or the relative size of a specific wall surface or ground, which is not described herein again.
S2: a certain shooting route is designed indoors, and the shooting route design principle is as follows: the overlapping degree of the shot images is not less than 60%, and the shot images can cover the whole indoor space;
s3: indoor oblique photogrammetry is carried out according to the route designed by S2;
s4: performing quality inspection on the image shot in the step S3, eliminating the overexposed and imaging blurred image, and performing supplementary shooting on the position where the image is eliminated;
s5: the coordinates of the image control points distributed in the S1 are sorted according to a required data format and are led into a three-dimensional modeling system;
s6: carrying out aerial triangulation on the image control point coordinates and the oblique photography image coordinates, and correcting the aerial triangulation of oblique photography measurement;
s7: extracting connection points based on aerial triangulation results, and constructing an irregular triangulation network;
s8: and (4) reconstructing a building model based on the irregular triangulation network, and performing texture mapping, so as to construct an indoor three-dimensional model.
By adopting the technical scheme, the process of artificially measuring each detail of the indoor building is reduced; the indoor building image is obtained by utilizing the oblique photography principle, and the three-dimensional model of the indoor building can be obtained automatically and rapidly by means of the three-dimensional modeling system; the modeling speed is high, and the construction period is short.
Example 2:
an embodiment 2 of the present disclosure provides an indoor three-dimensional modeling system based on a principle of oblique photography, including:
a data acquisition module configured to: acquiring indoor environment data to be modeled to obtain an oblique photography route;
an image processing module configured to: acquiring image data shot according to an oblique photography route and preprocessing the image data to obtain an oblique photography image coordinate;
an aerial triangulation correction module configured to: performing aerial triangulation according to the image coordinates of oblique photography and the coordinates of the indoor image control points, and correcting aerial triangulation results of oblique photography measurement;
a three-dimensional model building module configured to: and extracting connection points based on the aerial triangulation result, constructing an irregular triangulation network, and reconstructing a building model based on the irregular triangulation network to obtain an indoor three-dimensional model.
The working method of the system is the same as the indoor three-dimensional modeling method based on the oblique photography principle provided in embodiment 1, and details are not repeated here.
Example 3:
the embodiment 3 of the present disclosure provides a medium on which a program is stored, which when executed by a processor, implements the steps in the oblique photography principle-based indoor three-dimensional modeling method according to the embodiment 1 of the present disclosure, the steps being:
s1: wall image control points and ground image control points are respectively arranged indoors, the wall image control points are uniformly distributed on each indoor wall surface, 4 points are distributed on each wall surface, and the ground image control points are uniformly distributed on the ground and 4 image control points are distributed.
It can be understood that if the indoor space is large, the number of the image control points can be increased according to actual conditions, and the specific number of the image control points can be set according to the area size or the relative size of a specific wall surface or ground, which is not described herein again.
S2: a certain shooting route is designed indoors, and the shooting route design principle is as follows: the overlapping degree of the shot images is not less than 60%, and the shot images can cover the whole indoor space;
s3: indoor oblique photogrammetry is carried out according to the route designed by S2;
s4: performing quality inspection on the image shot in the step S3, eliminating the overexposed and imaging blurred image, and performing supplementary shooting on the position where the image is eliminated;
s5: the coordinates of the image control points distributed in the S1 are sorted according to a required data format and are led into a three-dimensional modeling system;
s6: carrying out aerial triangulation on the image control point coordinates and the oblique photography image coordinates, and correcting the aerial triangulation of oblique photography measurement;
s7: extracting connection points based on aerial triangulation results, and constructing an irregular triangulation network;
s8: and (4) reconstructing a building model based on the irregular triangulation network, and performing texture mapping, so as to construct an indoor three-dimensional model.
Example 4:
the embodiment 4 of the present disclosure provides an electronic device, which includes a memory, a processor, and a program stored in the memory and executable on the processor, where the processor executes the program to implement the steps in the oblique photography principle-based indoor three-dimensional modeling method according to the embodiment 1 of the present disclosure, where the steps are:
s1: wall image control points and ground image control points are respectively arranged indoors, the wall image control points are uniformly arranged on each indoor wall surface, and 4 points are arranged on each wall surface. The ground image control points are uniformly distributed on the ground, and 4 image control points are distributed.
It can be understood that if the indoor space is large, the number of the image control points can be increased according to actual conditions, and the specific number of the image control points can be set according to the area size or the relative size of a specific wall surface or ground, which is not described herein again.
S2: a certain shooting route is designed indoors, and the shooting route design principle is as follows: the overlapping degree of the shot images is not less than 60%, and the shot images can cover the whole indoor space;
s3: indoor oblique photogrammetry is carried out according to the route designed by S2;
s4: performing quality inspection on the image shot in the step S3, eliminating the overexposed and imaging blurred image, and performing supplementary shooting on the position where the image is eliminated;
s5: the coordinates of the image control points distributed in the S1 are sorted according to a required data format and are led into a three-dimensional modeling system;
s6: carrying out aerial triangulation on the image control point coordinates and the oblique photography image coordinates, and correcting the aerial triangulation of oblique photography measurement;
s7: extracting connection points based on aerial triangulation results, and constructing an irregular triangulation network;
s8: and (4) reconstructing a building model based on the irregular triangulation network, and performing texture mapping, so as to construct an indoor three-dimensional model.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. An indoor three-dimensional modeling method based on oblique photography principle is characterized in that: the method comprises the following steps:
acquiring indoor environment data to be modeled to obtain an oblique photography route;
acquiring image data shot according to an oblique photography route and preprocessing the image data to obtain an oblique photography image coordinate;
performing aerial triangulation according to the image coordinates of oblique photography and the coordinates of the indoor image control points, and correcting aerial triangulation results of oblique photography measurement;
and extracting connection points based on the aerial triangulation result, constructing an irregular triangulation network, and reconstructing a building model based on the irregular triangulation network to obtain an indoor three-dimensional model.
2. An indoor three-dimensional modeling method based on oblique photography principle as claimed in claim 1, characterized in that:
the indoor image control points comprise a plurality of image control points positioned on the ground and image control points positioned on each wall surface.
3. The oblique photography principle-based indoor three-dimensional modeling method according to claim 2, wherein:
the same number of image control points are distributed on the wall surface and the ground.
4. The oblique photography principle-based indoor three-dimensional modeling method according to claim 2, wherein:
the wall surface and the ground are respectively and uniformly provided with a plurality of image control points, and the number of the image control points is arranged according to the area of the wall surface.
5. An indoor three-dimensional modeling method based on oblique photography principle as claimed in claim 1, characterized in that:
the overlapping degree of the images shot on the oblique photographing route is more than or equal to 60 percent, and the shot images can cover the whole indoor space.
6. An indoor three-dimensional modeling method based on oblique photography principle as claimed in claim 1, characterized in that:
preprocessing image data, comprising: and removing the images with over exposure and imaging blur, and acquiring a complementary image at the position where the images are removed.
7. An indoor three-dimensional modeling method based on oblique photography principle as claimed in claim 1, characterized in that:
and processing the distributed image control point coordinates according to a required data format, and correcting the aerial triangulation result of oblique photography by using the processed image control point coordinates.
8. An indoor three-dimensional modeling system based on oblique photography principle is characterized in that: the method comprises the following steps:
a data acquisition module configured to: acquiring indoor environment data to be modeled to obtain an oblique photography route;
an image processing module configured to: acquiring image data shot according to an oblique photography route and preprocessing the image data to obtain an oblique photography image coordinate;
an aerial triangulation correction module configured to: performing aerial triangulation according to the image coordinates of oblique photography and the coordinates of the indoor image control points, and correcting aerial triangulation results of oblique photography measurement;
a three-dimensional model building module configured to: and extracting connection points based on the aerial triangulation result, constructing an irregular triangulation network, and reconstructing a building model based on the irregular triangulation network to obtain an indoor three-dimensional model.
9. A medium having a program stored thereon, wherein the program, when executed by a processor, performs the steps of the oblique photography principle based indoor three-dimensional modeling method according to any one of claims 1 to 7.
10. An electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps in the oblique photography principle based indoor three-dimensional modeling method according to any one of claims 1 to 7.
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