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Method for converting spherical coordinates in panoramic map into straight line segments

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: 2020-03-24
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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  • Method for converting spherical coordinates in panoramic map into straight line segments
  • Method for converting spherical coordinates in panoramic map into straight line segments
  • Method for converting spherical coordinates in panoramic map into straight line segments

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Embodiment Construction

[0018] Such as 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 center of the sphere O as the origin of the coordinates, and take the direction of the North Pole as the Z axis; take the longitude of 0 degrees and the latitude of 0 degrees as the X axis; take the longitude of 90 degrees and the latitude of 0 degrees as the Y axis Axis to establish a spatial Cartesian coordinate system; where the camera position is the center of the sphere.

[0020] The second step is to transform two points P1(lon1, lat1) and P2(lon2, lat2) on the spherical surface into the space Cartesian coordinate system O-XYZ, and 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 ...

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Abstract

The invention relates to a method for converting spherical coordinates in a panoramic map into straight line segments. By means of the method, encrypted point locations are visually located on a straight line. The core content of the method is three times of coordinate transformation, wherein the first time is to convert spherical coordinates of two points in a panorama into coordinates in a spacerectangular coordinate system, and interpolate and encrypt line segments in the rectangular coordinate system; the second time is to convert the interpolated coordinates into spherical coordinates; and the third time is to convert the coordinate system after the second time of conversion 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 image.

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 space Cartesian coordinate system, to perform linear interpolation between two different points, you only need to perform interpolation processing according to the linear interpolation formula. However, in the panoramic map, each panoramic map scene constructs a spherical surface with the camera position as the center and a certain distance as the radius, and the panoramic image is pasted on the inner spherical surface to form a real scene. The coordinate value is similar to that of the earth. Spherical coordinates of latitude and longitude. The observer's position is always at the center of the ball. In the panorama, it is supported to load point, line and surface data whose coordinates are lo...

Claims

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Application Information

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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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