CN117033862A - Conversion method, system and storage medium for converting geographic coordinates into AR coordinates - Google Patents
Conversion method, system and storage medium for converting geographic coordinates into AR coordinates Download PDFInfo
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Abstract
The application discloses a conversion method, a conversion system and a storage medium for converting geographic coordinates into AR coordinates, wherein the method comprises the following steps: acquiring known geographic data, selecting three points in the known geographic data to obtain three geographic coordinate points, and acquiring AR coordinates of the same three points in an AR equipment interface to obtain three AR coordinate points; converting the coordinates of the geographic coordinate points into space rectangular coordinates to obtain three space rectangular coordinate points; resolving conversion parameters according to coordinates of the space rectangular coordinate point and the AR coordinate point; and obtaining geographic data to be converted, selecting coordinate points to be converted from the geographic data to be converted, and converting the coordinates of the coordinate points to be converted into an AR coordinate system according to the conversion parameters. According to the application, three points at the same position are selected in two coordinate systems, and a coordinate conversion model of the two coordinate systems is established to obtain conversion parameters, so that the conversion from the geographic coordinates to the AR coordinates is completed, and the accurate landing of the AR graph is realized.
Description
Technical Field
The application relates to the technical field of AR, in particular to a conversion method, a conversion system and a storage medium for converting geographic coordinates into AR coordinates.
Background
AR (augmented reality) is a technology for superposing and fusing virtual information and a real world, and organically combines various technical means such as multimedia, three-dimensional modeling, real-time tracking and registering, intelligent interaction, sensing and the like, so that the effect of accurately putting and displaying a target of the virtual world in a real environment is achieved.
In many scenarios, if it is desired to efficiently and conveniently add real world information in the AR world, mapping of geographic coordinates in the AR scene needs to be completed. Because the geographic coordinate system is different from the AR coordinate system, the geographic coordinate system is required to be converted into the AR coordinate to be corresponding to realize that other information such as objects and the like can be added seamlessly in the AR scene.
Most of the existing coordinate conversion methods focus on mutual conversion under different geographic coordinate systems, such as conversion of coordinates under WGS84 into coordinates under ARC50 coordinate system, and there is no unified standard for the related technology of converting geographic coordinates into AR coordinates, which causes the problem of poor combining effect of AR environment targets and real environment.
Disclosure of Invention
The embodiment of the application provides a conversion method, a conversion system and a storage medium for converting geographic coordinates into AR coordinates, which are used for solving the problem that the conversion of the geographic coordinates into the AR coordinates in the prior art is not uniform.
In one aspect, an embodiment of the present application provides a method for converting geographic coordinates into AR coordinates, including:
acquiring known geographic data, selecting three points on the known geographic data to obtain three geographic coordinate points, and acquiring AR coordinates of the same three points in an AR equipment interface to correspondingly obtain three AR coordinate points;
converting the acquired coordinates of the three geographic coordinate points into space rectangular coordinates in a space rectangular coordinate system to respectively obtain three space rectangular coordinate points;
resolving conversion parameters according to coordinates of the space rectangular coordinate point and the AR coordinate point;
and obtaining geographic data to be converted, selecting coordinate points to be converted on the geographic data to be converted, and converting the coordinates of the coordinate points to be converted into an AR coordinate system according to the conversion parameters.
On the other hand, the embodiment of the application also provides a conversion system for converting the geographic coordinates into the AR coordinates, which comprises the following steps:
the coordinate point acquisition module is used for acquiring known geographic data, selecting three points on the known geographic data to obtain three geographic coordinate points, and acquiring AR coordinates of the same three points in the AR equipment interface to correspondingly obtain three AR coordinate points;
the first coordinate conversion module is used for converting the acquired coordinates of the three geographic coordinate points into space rectangular coordinates in a space rectangular coordinate system to respectively obtain three space rectangular coordinate points;
the conversion parameter analysis module is used for analyzing conversion parameters according to the coordinates of the space rectangular coordinate point and the AR coordinate point;
the second coordinate conversion module is used for acquiring geographic data to be converted, selecting coordinate points to be converted on the geographic data to be converted, and converting the coordinates of the coordinate points to be converted into an AR coordinate system according to conversion parameters.
In another aspect, an embodiment of the present application further provides a storage medium, where a plurality of computer instructions are stored, where the plurality of computer instructions are configured to cause a computer to perform the above method.
The conversion method, the conversion system and the storage medium for converting the geographic coordinates into the AR coordinates have the following advantages:
three points at the same position are selected in the two coordinate systems, a coordinate conversion model of the two coordinate systems is established, and conversion parameters are obtained, so that conversion from geographic coordinates to AR coordinates is completed, and accurate landing of the AR graph is realized.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for converting geographic coordinates into AR coordinates according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Fig. 1 is a flowchart of a method for converting geographic coordinates into AR coordinates according to an embodiment of the present application. The embodiment of the application provides a conversion method for converting geographic coordinates into AR coordinates, which comprises the following steps:
s1: the method comprises the steps of obtaining known geographic data, selecting three points on the known geographic data to obtain three geographic coordinate points, and obtaining AR coordinates of the same three points in an AR equipment interface to correspondingly obtain three AR coordinate points.
For example, the known geographic data may employ an image geographic map, and the three geographic coordinate points are respectively: first geographic coordinate point A (Lon 1 , Lat 1 , Alt 1 ) Second geographic coordinate point B (Lon 2 , Lat 2 , Alt 2 ) Third geographic coordinate point C (Lon 3 , Lat 3 , Alt 3 ) The three AR coordinate points are respectively: first AR coordinate point A' (X 1 ’, Y 1 ’, Z 1 'second AR coordinate point B' (X) 2 ’, Y 2 ’, Z 2 '), a third AR coordinate point C' (X) 3 ’, Y 3 ’, Z 3 '). The known geographic data is used for resolving conversion parameters used in subsequent actual conversion, so that a geographic coordinate system can be established in the known geographic data, an AR coordinate system can be established in an AR equipment interface corresponding to the known geographic data, three points are respectively selected on the same physical position, wherein the points in the geographic coordinate system are geographic coordinate points A, B and C, and the points in the AR coordinate system are AR coordinate points A ', B ' and C '.
It should be understood that the three geographic coordinate points may be randomly selected and that the true position of the three points, whether geographic or AR coordinate points, does not change, but because they are in different coordinate systems, the corresponding coordinates are also different.
S2: and converting the acquired coordinates of the three geographic coordinate points into space rectangular coordinates in a space rectangular coordinate system to respectively obtain the three space rectangular coordinate points.
Illustratively, three spatial rectangular coordinates are: a is that 1 (X 1 , Y 1 , Z 1 )、B 1 (X 2 , Y 2 , Z 2 )、C 1 (X 3 , Y 3 , Z 3 ) The conversion formula of the geographic coordinates and the space rectangular coordinates is as follows:
（1）
in the formula (1), the coordinates of the geographic coordinate point are%B,L,H) Namely, the coordinates expressed in the form of (Lon, lat, alt) are adopted, and the coordinates of the space rectangular coordinate point are [ ]X,Y,Z)。NFor the radius of the circle of the mortise,ethe first eccentricity of the earth is calculated as follows:
（2）
（3）
in the formulas (2) and (3),afor the equatorial radius of the reference ellipsoid,bis the polar radius of the reference ellipsoid.
S3: and resolving conversion parameters according to the coordinates of the space rectangular coordinate point and the AR coordinate point.
Illustratively, a coordinate transformation model shown in the formula (4) is constructed, and the space rectangular coordinate points A are respectively calculated 1 、B 1 、C 1 And the coordinates of the AR coordinate points A ', B ', C ' are brought into a coordinate conversion model, so that the method can be obtained:
（4）
in the formula (4) of the present application,,/>,/>coordinates of AR coordinate points +.>,/>,/>Is the coordinate of the converted space rectangular coordinate point. />,/>,/>For translation parameters->,/>,/>Is the angle rotation parameter>For scaling the scale parameters, the translation parameters, the angular rotation parameters and the scaling scale parameters are collectively referred to as conversion parameters.
Further, equation (4) may be converted into the following form:
（5）
will right angle coordinate point A 1 、B 1 、C 1 The coordinates of the points A ', B', C 'of the AR coordinate and the coordinates of the points A', B ', C' of the AR coordinate are substituted into the formula (5), and the coordinate is obtained by solving,/>,/>,/>,/>,/>,mSpecific values of (3).
S4: and obtaining geographic data to be converted, selecting coordinate points to be converted on the geographic data to be converted, and converting the coordinates of the coordinate points to be converted into an AR coordinate system according to the conversion parameters.
For example, the geographic data to be converted may also employ a visual geographic map.
The embodiment of the application also provides a conversion system for converting the geographic coordinates into the AR coordinates, which comprises the following steps:
the coordinate point acquisition module is used for acquiring known geographic data, selecting three points on the known geographic data to obtain three geographic coordinate points, and acquiring AR coordinates of the same three points in the AR equipment interface to correspondingly obtain three AR coordinate points;
the first coordinate conversion module is used for converting the acquired coordinates of the three geographic coordinate points into space rectangular coordinates in a space rectangular coordinate system to respectively obtain three space rectangular coordinate points;
the conversion parameter analysis module is used for analyzing conversion parameters according to the coordinates of the space rectangular coordinate point and the AR coordinate point;
the second coordinate conversion module is used for acquiring geographic data to be converted, selecting coordinate points to be converted on the geographic data to be converted, and converting the coordinates of the coordinate points to be converted into an AR coordinate system according to conversion parameters.
The embodiment of the application also provides a storage medium, wherein a plurality of computer instructions are stored in the storage medium, and the plurality of computer instructions are used for enabling a computer to execute the method.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (5)
1. The conversion method for converting the geographic coordinates into the AR coordinates is characterized by comprising the following steps:
acquiring known geographic data, selecting three points from the known geographic data to obtain three geographic coordinate points, and acquiring AR coordinates of the same three points in an AR equipment interface to correspondingly obtain three AR coordinate points;
converting the obtained coordinates of the three geographic coordinate points into space rectangular coordinates in a space rectangular coordinate system, and respectively obtaining three space rectangular coordinate points;
establishing a conversion model, analyzing conversion parameters according to the coordinates of the space rectangular coordinate point and the AR coordinate point, and inputting the conversion parameters into the conversion model;
and obtaining geographic data to be converted, selecting coordinate points to be converted from the geographic data to be converted, and converting the coordinates of the coordinate points to be converted into an AR coordinate system according to the conversion model.
2. The conversion method for converting geographical coordinates into AR coordinates according to claim 1, wherein coordinates of three of the geographical coordinate points are converted into space rectangular coordinates in a space rectangular coordinate system according to formula (1):
（1）
in the formula (1), the coordinates of the geographic coordinate point are%B, L, H) The coordinates of the space rectangular coordinate point are%X, Y, Z)，NFor the radius of the circle of the mortise,ethe first eccentricity of the earth is calculated as follows:
（2）
（3）
in the formulas (2) and (3),afor the equatorial radius of the reference ellipsoid,bis the polar radius of the reference ellipsoid.
3. The conversion method for converting geographic coordinates into AR coordinates according to claim 1, wherein when the conversion parameters are analyzed, a coordinate conversion model as shown in formula (4) is constructed, and coordinates of the spatial rectangular coordinate point and the AR coordinate point are respectively brought into the coordinate conversion model, so that it is possible to obtain:
（4）
in the formula (4) of the present application,, />, />for the coordinates of the AR coordinate point, +.>, />, />For the coordinates of the spatial rectangular coordinate point, +.>, />, />For translation parameters->, />, />Is the angle rotation parameter>For scaling scale parameters, the translation parameter, the angular rotation parameter, and the scaling scale parameter are collectively referred to as the conversion parameter.
4. A conversion system for converting geographic coordinates to AR coordinates, comprising:
the coordinate point acquisition module is used for acquiring known geographic data, selecting three points on the known geographic data to obtain three geographic coordinate points, and acquiring AR coordinates of the same three points in the AR equipment interface to correspondingly obtain three AR coordinate points;
the first coordinate conversion module is used for converting the acquired coordinates of the three geographic coordinate points into space rectangular coordinates in a space rectangular coordinate system to respectively obtain three space rectangular coordinate points;
the conversion parameter analysis module is used for analyzing conversion parameters according to the coordinates of the space rectangular coordinate point and the AR coordinate point;
the second coordinate conversion module is used for acquiring geographic data to be converted, selecting coordinate points to be converted on the geographic data to be converted, and converting the coordinates of the coordinate points to be converted into an AR coordinate system according to the conversion parameters.
5. A storage medium having stored therein a plurality of computer instructions for causing a computer to perform the method of any of claims 1-3.
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