Stereo Camera Positioning Using Light Source Markers
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Solution Overview
Problem
Existing location obtaining systems for objects within a prescribed space using stereo cameras lack efficiency in determining the installation location and shooting direction of imaging devices without direct measurement tools.
Innovation Solution
A system comprising light-emitting devices, imaging devices, and a server that specifies locations and obtains the installation location or shooting direction of imaging devices by detecting the positions of light sources in common images captured from different directions, using algorithms to calculate spatial locations and generate conversion matrices for accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If stereo camera technology is used to calculate object position from images, then direct measurement tools are eliminated, but the system cannot determine installation location and shooting direction of imaging devices without additional measurement
Solution Approach 1:
The patent introduces light-emitting devices as intermediary objects placed at known positions in the space. These devices serve as reference markers that imaging devices can detect, enabling the system to calculate both object positions and imaging device locations simultaneously through mutual observation relationships.
Solution Approach 2:
The patent transitions from two-dimensional image coordinate systems to three-dimensional spatial coordinates by incorporating depth information through triangulation. By using multiple imaging devices observing common light-emitting devices from different positions, the system establishes 3D spatial relationships that enable precise location determination.
2Measurement precision
If multiple imaging devices capture images from different directions, then spatial positioning accuracy is improved, but the complexity of determining installation locations increases
Solution Approach 1:
The system uses self-service by having imaging devices capture images of light-emitting devices, and then using those same images to determine the imaging devices' own installation locations. The light-emitting devices serve as universal reference points that all imaging devices can observe, creating a self-calibrating system.
Solution Approach 2:
The patent implements feedback by using the captured images to calculate and verify the positions of both imaging devices and light-emitting devices. The system continuously refines location accuracy by comparing observed positions with calculated positions and adjusting accordingly.
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
Enables accurate determination of imaging device locations and shooting directions within a three-dimensional space, facilitating the acquisition of installation locations of light sources and improving the efficiency of visible light communication systems.
Implementation Method 1
first light-emitting devices configured to emit light
Implementation Method 2
imaging devices configured to capture images of the prescribed space from mutually different directions
Data Source
AI summary
A server detects first light sources and the like within each image captured by cameras, and obtains a relative spatial location and shooting direction between the cameras using an algorithm in accordance with a detection count of the first light sources. Further, the server reads location information occurring in a space for the first light sources and the like stored in a memory, finds a spatial location and a shooting direction within the space for the cameras, and further finds a conversion matrix capable of converting a combination of image positions of the first light sources imaged by the camera and image positions of the first light sources imaged by the camera into installation locations of the first light sources and the like within the space.