Event-Based Marker Apparatus for Low-Power Position Detection
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Solution Overview
Problem
Existing event-based vision sensors face challenges in efficiently detecting markers in real spaces due to the nature of event signals generated by intensity changes in light, which differs from frame-based sensors.
Innovation Solution
A marker apparatus and computer system that utilize a light emitting part to display patterns appearing as shapes of specific sizes in images, allowing for optimized marker detection by transmitting control signals to the marker apparatus, thereby synchronizing light emission with image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a frame-based vision sensor is used to detect marker position, then the detection process is straightforward and reliable, but the time resolution is limited and power consumption is high
Solution Approach 1:
The patent replaces the frame-based vision sensor system with an event-based vision sensor system. This substitution fundamentally changes the detection mechanism from periodic frame scanning to asynchronous event-driven detection, achieving lower power consumption while maintaining detection reliability through the event-based architecture that only processes changes rather than continuous scanning
Solution Approach 2:
The marker apparatus uses periodic light emission patterns to generate events at known time intervals. This periodic action allows the event-based sensor to predict and efficiently detect marker positions by expecting events at specific times, combining the reliability of periodic signaling with the energy efficiency of event-based detection
2Use of energy by moving object
If an event-based vision sensor is used to detect marker position, then power consumption is reduced and time resolution is improved, but the detection process becomes complex due to the nature of event signals
Solution Approach 1:
The marker apparatus transmits control signals to display predetermined patterns before detection occurs. This preliminary action of pre-defining the light emission pattern allows the event-based sensor to anticipate the expected event sequence, simplifying the detection process by providing a known reference framework for interpreting the event signals
Solution Approach 2:
The system uses feedback from the detected event signals to adjust and optimize the detection process. By analyzing the timing and pattern of events received from the marker, the system can refine its detection algorithm and synchronize with the marker's light emission pattern, reducing the complexity of processing asynchronous event data
3Measurement precision
If the light emission pattern is not synchronized with image capture, then the marker detection may be missed or inaccurate, but synchronizing increases the complexity of coordination between components
Solution Approach 1:
The computer system transmits control signals to the marker apparatus in advance to display a predetermined light emission pattern. This preliminary synchronization setup ensures that the marker's light emission is coordinated with the event-based sensor's detection cycle before actual detection begins, improving position detection precision without requiring complex real-time synchronization mechanisms
Solution Approach 2:
The event-based vision sensor inherently generates events based on light intensity changes without requiring external triggering. The marker apparatus self-synchronizes by emitting light in a predetermined pattern that naturally generates detectable events, allowing the system to achieve synchronization through the self-service nature of event generation rather than complex coordinated control
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
This approach enables swift and accurate detection of marker positions in real spaces using event-based vision sensors, reducing motion blur and improving detection speed and precision.
Implementation Method 1
a light emitting part 240 configured to display a pattern that appears as a shape having a size in the image
Data Source
AI summary
There is provided a marker apparatus disposed in a real space for detecting a position in the real space in an image. The marker apparatus includes a light emitting part configured to display a pattern that appears as a shape having a size in the image. Furthermore, there is provided a computer system for detecting a position in a real space in an image. The computer system includes a memory for storing a program code and a processor for executing operation in accordance with the program code. The operation includes transmitting a control signal for displaying a pattern that appears as a shape having a size in the image, to a marker apparatus disposed in the real space.