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Method for acquiring actual geographic information based on photos with time attributes

A time attribute and geographic information technology, applied in the field of geographic information calculation, can solve problems such as inability to obtain accurate feedback, inability to effectively solve navigation problems, and GPS satellites inability to effectively solve positioning problems, so as to improve work efficiency and reduce search range effect

Inactive Publication Date: 2016-08-31
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when signals cannot be transmitted to GPS satellites, GPS satellite navigation and positioning cannot effectively solve navigation problems.
When there are only data files in similar formats such as videos or photos, GPS satellites cannot effectively solve the positioning problem
GPS positioning is real-time, and the information is sent and fed back at the time. If it exceeds a certain time limit, GPS cannot complete the positioning problem and cannot get accurate feedback.

Method used

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  • Method for acquiring actual geographic information based on photos with time attributes
  • Method for acquiring actual geographic information based on photos with time attributes
  • Method for acquiring actual geographic information based on photos with time attributes

Examples

Experimental program
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Embodiment

[0072] Taking a video file with time attributes as an example, calculate the geographic location of the video shooting location. Extract multiple continuous photos from the video file, take one of them as an example, perform edge detection, and extract the two-bit information of the feature points in the photo.

[0073] image 3 As shown, using Matlab to import the image that has been extracted by the edge of the LoG operator, it is easy to extract the edge information. According to the edge information, pixel points are inserted at the corner points, and the extension lines of the edge lines intersecting at the vanishing point are drawn, and the equation of the line is obtained. Since it is impossible to obtain very accurate image coordinates in actual situations, the vanishing points of a set of parallel straight line extensions cannot intersect at the same point, but form a triangle, and the orthocenter of this triangle is solved here as the fitting vanishing point.

[00...

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PUM

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Abstract

The invention provides a method for acquiring actual geographic information based on photos with time attributes. The method comprises the following steps: acquiring data; extracting characteristic points; resolving three-dimensional coordinates; extracting a function of shadow length under multiple conditions; and resolving latitude and longitude. The method for acquiring actual geographic information based on the photos with time attributes can substantially position an object without the aid of a GPS navigation satellite and is not limited by time.

Description

technical field [0001] The invention relates to a method for calculating geographical information, in particular to a method for obtaining actual geographical information based on photos with time attributes. Background technique [0002] At present, the mainstream positioning technology is GPS positioning. Its positioning principle is that the target signal source transmits signals to the GPS navigation satellite, and the GPS navigation satellite measures the position of the target signal source to determine the three-dimensional coordinates of the target, which belongs to active positioning. The existing technologies in the field of object positioning mainly realize the positioning of signal sources by transmitting signals to GPS satellites. Even passive positioning belongs to positioning tracking, and GPS satellites still play a major role. However, when signals cannot be transmitted to GPS satellites, GPS satellite navigation and positioning cannot effectively solve the...

Claims

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Application Information

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IPC IPC(8): G01C11/24G01C1/04
CPCG01C1/04G01C11/24
Inventor 阎少宏李坛王梦张飞韩静胡鸿奎吴宇航
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY