A method for correcting the distortion of aerial triangulation results of narrow strip data collected by aerial photography

Abstract

The present invention discloses a method for correcting the distortion of aerial triangulation results of aerial photography narrow strip collection data, comprising the following steps: S1: selecting data of a local area from the narrow strip collection data; S2: performing aerial triangulation on the data of the local area through the aerial triangulation function of the real scene modeling software; S3: exporting the optical property information of the camera group corresponding to the aerial triangulation result of the data of the local area; S4: loading all the narrow strip collection data by using the real scene modeling software; S5: before performing aerial triangulation on all the narrow strip collection data, importing and fixing the optical property information of the camera group obtained in step S3; S6: the real scene modeling software performs aerial triangulation calculation and outputs the aerial triangulation result. The present invention eliminates the influence of the optical property information of the camera group on the narrow strip collection data by fixing the optical property information of the camera group, thereby improving the quality of modeling.

Description

Technical Field

[0001] The present invention relates to the technical field of real scene modeling, and in particular to a method for correcting distortion of aerial triangulation results of aerial photography narrow strip collection data. Background Art

[0002] At present, the real-life 3D modeling software on the market often encounters the problem of distortion, bending, and looping of aerial triangulation results when processing data collected by drones in narrow and long strips. When encountering such narrow and long strip data, the traditional way to improve it is to segment the narrow and long strip data so that each piece of data after segmentation is more evenly distributed, and then perform aerial triangulation on each segment of data separately, and finally merge the multiple aerial triangulation data after segmentation to output a complete aerial triangulation file, so as to improve the distortion, bending, and looping of the narrow and long strip data. The traditional processing method can solve the distortion, bending, and looping of the narrow and long strip data to a certain extent, but it is only a temporary solution. The segmented aerial triangulation will cause the accuracy of each aerial triangulation result to be inconsistent, resulting in edge connection errors, which will derive problems such as the accuracy and quality of the aerial triangulation results, which will have a serious impact on the subsequent production of 3D model data.

[0003] Therefore, the prior art has defects and needs to be improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for correcting the distortion of aerial triangulation results of aerial photography data collected in narrow strips, so as to solve the problems of distortion, bending and ringing of aerial triangulation results of image data collected in narrow strips by unmanned aerial vehicles, while also being able to fully guarantee the relative accuracy of the overall aerial triangulation results, avoiding problems such as edge connection errors caused by segmented aerial triangulation of narrow and long data.

[0005] The technical solution of the present invention is as follows: a method for correcting the distortion of aerial triangulation results of aerial photography narrow strip acquisition data is provided, comprising the following steps.

[0006] S1: Select a local area of ​​data from the narrow strip of collected data.

[0007] S2: Perform aerial triangulation on the data of the local area through the aerial triangulation function of the real scene modeling software.

[0008] S3: Export the optical property information of the camera group corresponding to the data aerotriangulation result of the local area.

[0009] S4: Use the real scene modeling software to load all the narrow strip collection data.

[0010] S5: Before performing aerial triangulation on all the narrow strip-shaped collected data, the optical property information of the camera group obtained in step S3 is imported, and the optical property information of the camera group in the aerial triangulation is fixed to the optical property information of the camera group obtained in step S3.

[0011] S6: After the optical property information of the camera group in the aerial triangulation solution is fixed, the real scene modeling software performs aerial triangulation calculations on all the narrow strip acquisition data and outputs the aerial triangulation results.

[0012] By fixing the optical property information of the camera group, the influence of the optical property information of the camera group on the data collected by the narrow strip is eliminated. At the same time, the inconsistency of the accuracy of the various aerial triangulation results caused by the traditional processing method, the edge error caused by the error, and the accuracy and quality of the derived aerial triangulation results are avoided, thus improving the quality of modeling.

[0013] Furthermore, in step S2, if the real scene modeling software fails to perform aerial triangulation on the data of the local area, connection points are added and the aerial triangulation is performed again.

[0014] Furthermore, in step S6, if the real scene modeling software fails to perform aerial triangulation on the narrow strip of collected data, connection points are added and aerial triangulation is performed again.

[0015] Furthermore, in step S3, the optical property information of the camera group corresponding to the aerial triangulation result of the data of the local area is exported through the real scene modeling software.

[0016] Furthermore, the data of the local area is based on the condition of the same acquisition data.

[0017] Furthermore, the aspect ratio of the local area is between 3:4 and 4:3.

[0018] Furthermore, the real scene modeling software is ContextCapture. The real scene modeling software is not limited to ContextCapture, but also includes other real scene modeling software currently on the market and subsequent new real scene modeling software.

[0019] Furthermore, in a preferred embodiment, the method for correcting the distortion of aerial triangulation results of aerial photography narrow strip acquisition data also includes: S7: If the aerial triangulation result of step S6 still shows ring-shaped and / or distorted and / or bent results, select data of another local area from the narrow strip acquisition data, repeat steps S2-S6, and obtain a second aerial triangulation result; if the aerial triangulation result is normal, output the aerial triangulation result, otherwise re-enter step S1.

[0020] By adopting the above scheme, the present invention provides a method for correcting the distortion of aerial triangulation results of aerial photography narrow strip collection data, which eliminates the influence of the optical property information of the camera group on the narrow strip collection data by fixing the optical property information of the camera group. At the same time, it avoids the problems of inconsistent precision of various aerial triangulation results and edge connection errors caused by traditional processing methods, as well as the precision quality of aerial triangulation results, and improves the quality of modeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a flow chart of an embodiment of the present invention;

[0022] Figure 2 This is the effect diagram of the aerial triangulation result directly output by aerial triangulation solution for the aerial narrow strip image data;

[0023] Figure 3 This is the effect diagram of the aerial triangulation result output by using this method to perform aerial triangulation on the aerial narrow strip image data;

[0024] Figure 4 It is a flowchart of another embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] See also Figure 1 This embodiment provides a method for correcting the distortion of aerial triangulation results of aerial photography narrow strip data collection, including the following steps.

[0028] S1: Select data of a local area from the narrow strip of collected data. The data of the local area is based on the same collection data. The aspect ratio of the local area is between 3:4 and 4:3.

[0029] S2: Performing aerial triangulation on the data of the local area through the aerial triangulation function of the real scene modeling software. In this embodiment, the real scene modeling software is ContextCapture. If the real scene modeling software fails to perform aerial triangulation on the data of the local area, add connection points and perform aerial triangulation again.

[0030] S3: Export the optical property information of the camera group corresponding to the aerial triangulation result of the local area data through the real scene modeling software.

[0031] S4: Use the real scene modeling software to load all the narrow strip collection data.

[0032] S5: Before performing aerial triangulation on all the narrow strip-shaped collected data, the optical property information of the camera group obtained in step S3 is imported, and the optical property information of the camera group in the aerial triangulation is fixed to the optical property information of the camera group obtained in step S3.

[0033] S6: After the optical property information of the camera group in the aerial triangulation solution is fixed, the real scene modeling software performs aerial triangulation on all the narrow strip acquisition data and outputs the aerial triangulation results. If the real scene modeling software fails to perform aerial triangulation on the narrow strip acquisition data, add connection points and perform aerial triangulation again.

[0034] See also Figure 2 and Figure 3 ,from Figure 3 It can be seen that the effect diagram of the aerial triangulation results obtained by this method can well solve the problem of Figure 2 It can solve the problems of distortion, bending and ringing in the model; moreover, since the aerial triangulation is solved for the entire data, there will be no problems such as inconsistent accuracy of the aerial triangulation results, edge connection errors caused by the traditional processing method, and the accuracy and quality of the aerial triangulation results; it can effectively improve the quality of modeling.

[0035] Example 2

[0036] See also Figure 4 This embodiment provides a method for correcting the distortion of aerial triangulation results of aerial photography narrow strip data collection, including the following steps.

[0037] S1: Select data of a local area from the narrow strip of collected data. The data of the local area is based on the same collection data. The aspect ratio of the local area is between 3:4 and 4:3.

[0038] S2: Performing aerial triangulation on the data of the local area through the aerial triangulation function of the real scene modeling software. In this embodiment, the real scene modeling software is ContextCapture. If the real scene modeling software fails to perform aerial triangulation on the data of the local area, add connection points and perform aerial triangulation again.

[0039] S3: Export the optical property information of the camera group corresponding to the aerial triangulation result of the local area data through the real scene modeling software.

[0040] S4: Use the real scene modeling software to load all the narrow strip collection data.

[0041] S5: Before performing aerial triangulation on all the narrow strip-shaped collected data, the optical property information of the camera group obtained in step S3 is imported, and the optical property information of the camera group in the aerial triangulation is fixed to the optical property information of the camera group obtained in step S3.

[0042] S6: After the optical property information of the camera group in the aerial triangulation solution is fixed, the real scene modeling software performs aerial triangulation on all the narrow strip acquisition data and outputs the aerial triangulation results. If the real scene modeling software fails to perform aerial triangulation on the narrow strip acquisition data, add connection points and perform aerial triangulation again.

[0043] S7: If the aerial triangulation result of step S6 still shows ring, distortion or bending results, select data of another local area from the narrow strip of collected data, repeat steps S2-S6, and obtain the second aerial triangulation result; if the aerial triangulation result is normal, output the aerial triangulation result, otherwise re-enter step S1.

[0044] In summary, the present invention provides a method for correcting the distortion of aerial triangulation results of aerial photography narrow strip collection data, which eliminates the influence of the optical property information of the camera group on the narrow strip collection data by fixing the optical property information of the camera group. At the same time, it avoids the problems of inconsistent precision of various aerial triangulation results and edge errors caused by traditional processing methods, as well as the precision and quality of the derived aerial triangulation results, and improves the quality of modeling.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for correcting the distortion of aerial triangulation results of aerial photography narrow strip data collection, characterized in that: The following steps are involved: S1: selecting data of a local area from the narrow strip-shaped collected data; the aspect ratio of the local area is between 3:4 and 4:3; S2: Perform aerial triangulation on the data of the local area through the aerial triangulation function of the real scene modeling software; S3: exporting the optical property information of the camera group corresponding to the aerotriangulation result of the local area data; S4: Use the reality modeling software to load all the narrow strip collection data; S5: before performing aerotriangulation on all the narrow strip-shaped collected data, import the optical property information of the camera group obtained in step S3, and fix the optical property information of the camera group in the aerotriangulation to the optical property information of the camera group obtained in step S3; S6: After the optical property information of the camera group in the aerial triangulation solution is fixed, the reality modeling software performs aerial triangulation calculations on all the narrow strip-shaped collected data and outputs the aerial triangulation results; It also includes: S7: If the aerial triangulation result of step S6 still shows distorted results, select data of another local area from the narrow strip of collected data, repeat steps S2-S6, and obtain a second aerial triangulation result; if the aerial triangulation result is normal, output the aerial triangulation result, otherwise re-enter step S1.

2. The method for correcting the distortion of aerial triangulation results of aerial photography narrow strip data acquisition according to claim 1 is characterized in that: In step S2, if the real scene modeling software fails to perform aerial triangulation on the data of the local area, connection points are added and the aerial triangulation is performed again.

3. The method for correcting the distortion of aerial triangulation results of aerial photography narrow strip data acquisition according to claim 1 is characterized in that: In step S6, if the real scene modeling software fails to perform aerial triangulation on the narrow strip of collected data, add connection points and perform aerial triangulation again.

4. The method for correcting the distortion of aerial triangulation results of aerial photography narrow strip data acquisition according to claim 1 is characterized in that: In step S3, the optical property information of the camera group corresponding to the aerial triangulation result of the data in the local area is exported through the real scene modeling software.

5. The method for correcting the distortion of aerial triangulation results of aerial photography narrow strip data acquisition according to claim 1 is characterized in that: The data of the local area is based on the conditions of the same data collection.

6. A method for correcting distortion of aerial triangulation results of aerial photography narrow strip data acquisition according to any one of claims 1 to 5, characterized in that: The real scene modeling software is ContextCapture.

Images