Terminal Positioning via Image Feature Matching
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Solution Overview
Problem
The Global Positioning System (GPS) faces challenges in providing timely and accurate positioning information, especially in adverse space environments and indoors, resulting in poor positioning accuracy and reliability.
Innovation Solution
A terminal positioning method that involves a positioning server receiving image data from a target terminal, extracting feature information, and matching it with pre-established correspondences to determine location information, allowing for accurate positioning without relying on GPS signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If GPS is used for positioning, then positioning information can be provided globally, but positioning accuracy deteriorates in adverse space environments and indoors
Solution Approach 1:
The patent introduces image data as an intermediary medium to bridge the gap between terminal location and positioning information. Instead of relying directly on GPS signals, the system uses image data captured by the terminal to identify feature points, matches them with pre-stored correspondence data, and derives location information, thereby overcoming GPS limitations in adverse environments and indoors
Solution Approach 2:
The patent replaces the GPS-based positioning mechanism with an image-based positioning mechanism. The system substitutes satellite signal reception with image data processing, using feature point extraction and matching algorithms to determine location, thus eliminating dependency on GPS signals that fail in certain environments
2Reliability
If GPS signal receiver is used, then positioning information can be received, but positioning reliability deteriorates when GPS signals are adversely affected
Solution Approach 1:
The patent converts the limitation of GPS signal vulnerability into an opportunity to adopt alternative positioning methods. By using image data and feature point matching, the system transforms the harmful effect of GPS signal interference into a benefit by establishing a complementary positioning approach that is immune to space environment disturbances
Solution Approach 2:
The patent performs preliminary action by pre-storing correspondence data between feature points and location information before the actual positioning occurs. This pre-processing enables the system to quickly and reliably determine location by simply matching current image features against the pre-established database, ensuring consistent positioning reliability without real-time GPS dependency
3Measurement precision
If image data processing is used for positioning, then positioning accuracy improves in indoor and adverse environments, but device complexity increases
Solution Approach 1:
The patent uses copying by creating a virtual copy of the environment through image data and feature point extraction. Instead of requiring complex hardware modifications, the system copies environmental information into digital form (image data and corresponding location information), which can then be processed and matched to determine position, simplifying the overall system architecture while improving accuracy
Data Source
AI summary
The present disclosure provides a terminal positioning method for a positioning server. The method includes: receiving image data transmitted by a target terminal, obtaining target feature information based on the image data, wherein the target feature information represents an environment feature of the target terminal, looking up a table of predetermined correspondences between pieces of feature information and pieces of location information, so as to determine target location information corresponding to the target feature information, and transmitting the target location information to the target terminal. According to the present disclosure for terminal positioning, more accurate target location information may be obtained to improve the positioning accuracy and reliability.