Mobile Positioning Using Mark Appearance and Angle Analysis
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Solution Overview
Problem
Current methods for determining the position of a mobile device using image analysis and marks with associated position data are limited in accuracy and efficiency, particularly when the angle between the imaging device and the mark surface affects the position determination.
Innovation Solution
A method that involves obtaining an image of a mark with encoded position data, decoding the mark using a processor, and analyzing the mark's appearance in combination with the derived data to determine the device's position, which can be performed on the device or remotely, using a database to access and compare the mark's position data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the angle between the imaging device and the mark surface is not considered in position determination, then the system is simpler to implement, but the position determination accuracy deteriorates
Solution Approach 1:
The patent applies parameter changes by incorporating the angle between the imaging device and mark surface as an additional parameter in the position determination process. The system captures images at different angles and uses these angular variations to calculate precise position data, transforming a two-dimensional mark recognition problem into a three-dimensional spatial measurement problem that resolves the accuracy-complexity contradiction
Solution Approach 2:
The patent introduces a new dimension (angular dimension) to the position determination system. By measuring the angle between the imaging device and the mark surface in addition to the standard x-y coordinates, the system creates a three-dimensional position space that enables more accurate location determination while maintaining manageable system complexity through mathematical modeling
2Use of energy by moving object
If position determination is performed remotely rather than on the mobile device, then processing power requirements are reduced, but communication time and data transmission overhead increase
Solution Approach 1:
The patent applies partial action by performing only the image capture and initial mark detection on the mobile device, then transmitting only the essential image data or extracted features to the remote server for final position calculation. This division of labor reduces mobile device energy consumption while minimizing communication overhead and maintaining acceptable response times
Data Source
AI summary
Method for determining position of a mobile device having an imaging device includes obtaining an image of a mark on a known-position object from the imaging device, the mark having an encoded position, decoding the mark to derive data about the position of the mark using a database of marks and their positions, and analyzing appearance of the mark in the image in combination with the derived data about the position of the mark to determine the position of the mobile device. Mark appearance analysis may involve analyzing an angle between an imaging direction of the imaging device and a surface of the mark.