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A Method of Converting Spherical Coordinates in Panoramic Maps to Straight Lines

A panoramic map and spherical coordinate technology, applied in the field of coordinate conversion, can solve problems such as not meeting application requirements

Active Publication Date: 2022-06-21
SHENZHEN XINYI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This effect cannot meet the application requirements for linear features in panoramic maps in practice

Method used

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  • A Method of Converting Spherical Coordinates in Panoramic Maps to Straight Lines
  • A Method of Converting Spherical Coordinates in Panoramic Maps to Straight Lines
  • A Method of Converting Spherical Coordinates in Panoramic Maps to Straight Lines

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Embodiment Construction

[0018] like Figures 1 to 4 As shown, a method for converting spherical coordinates in a panoramic map into straight line segments includes the following steps.

[0019] The first step is to take the sphere center O as the origin of the coordinates and the direction of the north pole as the Z axis; the direction with longitude as 0 degrees and latitude as 0 degrees is the X axis; the direction with longitude as 90 degrees and latitude as 0 degrees is Y The axis establishes a space Cartesian coordinate system; among them, the camera position is the center of the sphere.

[0020] The second step is to convert the two points P1(lon1,lat1) and P2(lon2,lat2) on the spherical surface to the space rectangular coordinate system O-XYZ, the result is P1´(x1,y1,z1), P2´(x2 ,y2,z2) conversion method is: x = R * cos(lat) * cos(lon), y = R * cos(lat) * sin(lon), z = R * sin(lat). Among them, R is the radius of the spherical coordinate system, lat is the longitude of the point on the spher...

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Abstract

The invention relates to a method for converting spherical coordinates in a panoramic map into straight line segments, and uses the method to make encrypted points visually located on the straight line. Its core content is three coordinate transformations. The first time is to transform the spherical coordinates of two points in the panorama into the coordinates in the space Cartesian coordinate system, and interpolate and encrypt the line segment in the Cartesian coordinate system; the second time is to convert the interpolation The final coordinates are converted into spherical coordinates, and the third time is to convert the coordinate system after the second transformation into the spherical coordinate system of the panoramic map, so that the final result set is displayed on the same straight line in the panoramic map.

Description

technical field [0001] The invention relates to a coordinate conversion method in a panoramic map, in particular to a method for converting spherical coordinates in a panoramic map into straight line segments. Background technique [0002] In the plane Cartesian coordinate system or the space Cartesian coordinate system, to perform linear interpolation between two different points, it is only necessary to perform interpolation processing according to the linear interpolation formula. But in the panoramic map, each panoramic map scene builds a sphere with the camera position as the center and a certain distance as the radius, and the panorama is fitted on the inner sphere to form a real scene. The coordinate value is similar to the earth. Spherical coordinates of latitude and longitude. The observer's position is always at the center of the sphere. In the panorama, it supports to load point, line, and surface data whose coordinates are longitude (vertical coordinates) and l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/00
CPCG06T3/08
Inventor 洪启祥向刚刘聪贾伟张玉超马中旺唐小毅柴炯杨就邹劲锋王杰欧桂逢蓝国钟王玮易作辉吴志涛贾文渊王晖古远灵黄志远施楚强周颢王嘉骏
Owner SHENZHEN XINYI TECH CO LTD
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