Dual Camera Motion Sensing for Rotational Detection
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Solution Overview
Problem
Current motion sensing technologies for portable devices are inadequate, as they often require costly hardware and complex processing, providing limited precision and inability to detect rotational motion, especially with GPS and gyroscope systems.
Innovation Solution
A motion sensing system utilizing a pair of cameras positioned along different viewing axes, where a processor compares image changes from both cameras to determine device motion, enabling precise motion detection, including rotational movements, without the need for expensive gyroscopes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS or hybrid position determination system is used for motion sensing, then the system can provide position information, but the precision is inadequate and rotational motion cannot be determined
Solution Approach 1:
The patent divides the motion sensing function into multiple camera components, each capturing images from different viewing axes. By segmenting the sensing task across multiple cameras positioned at different orientations, the system achieves both translational and rotational motion detection capabilities that a single sensor cannot provide.
Solution Approach 2:
The patent transitions from single-point position sensing (GPS) to multi-dimensional image-based sensing. By using cameras positioned along different viewing axes and analyzing image changes in multiple dimensions, the system achieves comprehensive motion detection including rotation, which adds dimensional complexity to the sensing capability.
2Measurement precision
If gyroscope systems are used for motion sensing, then rotational motion can be detected, but the hardware cost becomes excessive
Solution Approach 1:
The patent uses multiple cameras to create visual copies of the motion scene from different perspectives. By analyzing the changes in these visual copies rather than using physical gyroscopic sensors, the system achieves rotational motion detection at a lower hardware cost. The cameras serve as substitutes for expensive rotational sensing hardware.
Solution Approach 2:
The patent replaces mechanical gyroscope systems with an optical imaging system. Instead of using mechanical rotating elements to detect motion, the system uses cameras to capture images and processes these images to determine motion, including rotation. This substitution eliminates the need for costly mechanical sensing components.
3Ease of manufacture
If single camera motion sensing is used, then hardware cost is reduced, but the measurement precision and completeness of motion data is insufficient
Solution Approach 1:
The patent merges the capabilities of multiple cameras into a unified motion sensing system. By combining image data from cameras positioned along different viewing axes and processing these merged data streams together, the system achieves complete motion detection (including translation and rotation) that would be impossible with a single camera, while maintaining the cost benefits of using standard camera hardware.
Data Source
AI summary
Motion sensing of a portable device using two cameras. A first camera is directed along a first viewing axis and a second camera is directed along a second viewing axis, different from the first viewing axis. The second viewing axis can be substantially opposite the first viewing axis. A motion processing module determines changes in images from the first camera and changes in images from the second camera. The motion processing module compares the direction of change determined from the first camera images relative to the direction of change determined from the second camera images. The motion processing module determines the motion of the portable device based in part on the comparison.