Camera Switching for Indoor Light Signal Positioning
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Solution Overview
Problem
Current indoor positioning systems face challenges in accuracy due to the limitations of GPS in indoor environments and the unpredictability of radio wave propagation in complex indoor settings, necessitating a more reliable and precise method for locating mobile devices within buildings.
Innovation Solution
A light-based positioning system utilizing modulated LED light sources to transmit digital pulse recognition information, which is received by imaging sensors in mobile devices, enabling precise indoor location determination through photogrammetry and data demodulation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS is used for positioning, then outdoor location accuracy is achieved, but indoor positioning accuracy deteriorates due to signal blockage
Solution Approach 1:
The patent introduces LED light sources as intermediary objects that transmit positioning information optically. These LEDs serve as mediators between the positioning system and mobile devices, enabling indoor localization without relying on blocked GPS signals. The optical communication channel provided by LEDs allows accurate positioning in environments where radio wave propagation fails.
2Ease of operation
If radio wave propagation is used for indoor positioning, then wireless communication is achieved, but positioning accuracy deteriorates due to unpredictable propagation in complex indoor settings
Solution Approach 1:
The patent replaces radio wave propagation (electromagnetic field-based system) with optical signal transmission using LED lights. This substitution eliminates the issues of unpredictable radio wave behavior in complex indoor environments while maintaining wireless communication capabilities. The optical system provides more predictable and controllable signal propagation for accurate positioning.
3Measurement precision
If multiple cameras are used to receive light signals, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic camera switching based on real-time detection of LED light sources. Instead of using multiple cameras simultaneously (which would increase complexity), the system dynamically selects and switches between available cameras depending on which ones can currently receive light signals. This dynamic approach maintains positioning accuracy while avoiding the complexity of operating multiple cameras in parallel.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides high accuracy in indoor positioning, minimizing user input and enabling efficient data transfer with potential for augmented reality applications and location-aware computing, while being energy-efficient and cost-effective.
Implementation Method 1
received by imaging sensors in mobile devices, enabling precise indoor location determination
Data Source
AI summary
In one aspect, the present disclosure relates to a method for a method for hiding a camera preview feed of a mobile device application. The method may proceed by the mobile device application enabling an imaging sensor of the mobile device, where the software of the mobile device requires the mobile device application to display the camera preview feed when the imaging sensor is enabled. The method may continue by creating a camera preview surface for displaying the camera preview feed. The method may further continue by modifying the camera preview surface to be hidden from the mobile device user. The method may end by setting the camera preview feed to be displayed on the camera preview surface. In another aspect, the present disclosure further relates to modifying the camera preview surface by resizing the camera preview surface to be one pixel large.