Vision Sensor Event Signal Storage via Hash Addressing
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Solution Overview
Problem
Existing methods for storing event signals from event-based vision sensors are inefficient in managing and retrieving data due to high computational complexity and power consumption, as they lack effective addressing mechanisms for asynchronous signal processing.
Innovation Solution
A method and apparatus that utilize a hash function to determine unique event addresses in memory based on signal reception time, allowing for efficient storage and retrieval of event signals, and transmit addresses to vision sensors with current time and identification information, enabling efficient data management and reduced computational load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If event signals are stored using conventional methods without hash-based addressing, then the system can store event signals, but the computational complexity and power consumption increase due to lack of efficient addressing mechanisms
Solution Approach 1:
The patent replaces conventional linear search and address management mechanisms with a hash function-based addressing system. The hash function directly computes memory addresses from event signal characteristics, eliminating the need for complex search algorithms and reducing computational overhead in storing and retrieving event signals from vision sensors
Solution Approach 2:
The patent transforms the addressing parameter from sequential or linear search-based addresses to hash-based addresses derived from event signal properties. This parameter change enables direct address computation, reducing the computational complexity and power consumption associated with traditional event signal storage management
2Speed
If event signals are stored without hash-based addressing, then the storage system can function, but the retrieval speed decreases due to linear searches
Solution Approach 1:
The patent performs preliminary action by pre-computing hash-based addresses when event signals are generated and stored. This allows for direct and rapid retrieval of event signals without requiring linear searches during data access, thereby improving retrieval speed and overall data handling efficiency
3Adaptability or versatility
If addresses are not mapped to vision sensor identification information, then the memory addressing system can operate, but the ability to manage multiple vision sensors efficiently decreases
Solution Approach 1:
The patent implements a universal hash-based addressing scheme that can handle multiple vision sensors with different identification information. The hash function incorporates sensor ID as an input parameter, enabling the same storage system to efficiently manage events from multiple sensors without requiring separate addressing mechanisms for each sensor
Data Source
AI summary
A method and apparatus for storing an event signal and an image, and an operating method of a vision sensor for transmitting an event signal to a storing apparatus, are provided. The storing method includes receiving an event signal from a vision sensor at a time, determining an event address of an area of a memory based on the time at which the event signal is received, and storing the event signal in the area corresponding to the event address.