Pixel-Wise Gain Control for Flexible Event Detection Sensors
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Solution Overview
Problem
Dynamic Vision Sensors (DVS) face challenges in flexibly detecting events related to changes in electric signals from pixels, which limits their effectiveness in capturing and processing image data efficiently.
Innovation Solution
A sensor system with pixels that perform photoelectric conversion, an event detecting unit, and a gain adjustment mechanism that allows for flexible detection of changes in electric signals by adjusting the gain for each pixel, enabling more precise and adaptive event detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a DVS outputs event data asynchronously based on pixel changes, then the sensor can capture dynamic scenes efficiently, but the detection flexibility and precision are limited due to fixed gain settings
Solution Approach 1:
The patent implements dynamic gain adjustment for each pixel in the DVS, allowing the gain to be changed in real-time based on lighting conditions and scene requirements. This dynamic adjustment mechanism enables the sensor to adapt to varying environments while maintaining precise event detection capability across different scenarios.
Solution Approach 2:
The patent changes the electrical parameter (gain) of each pixel to optimize event detection. By adjusting the gain parameter individually for each pixel, the system can enhance sensitivity in low-light conditions or reduce noise in bright conditions, thereby improving both detection precision and flexibility without requiring hardware modifications.
2Adaptability or versatility
If the DVS uses fixed gain settings for event detection, then the device complexity is reduced, but the ability to adapt to different lighting conditions and scene requirements is limited
Solution Approach 1:
The patent applies local quality by allowing each pixel to have its own independently adjustable gain setting. This enables different regions of the sensor to be optimized for different lighting conditions, with each pixel adapting to its specific local environment rather than using a uniform global gain setting.
Solution Approach 2:
The patent implements self-service through automatic gain adjustment mechanisms where the sensor system automatically adapts gain settings based on detected scene characteristics and lighting conditions. This reduces the need for manual intervention while maintaining high adaptability to varying environmental conditions.
3Measurement precision
If the DVS reads pixels as needed for event data, then the output efficiency is improved, but the detection sensitivity and signal quality may be compromised without gain adjustment
Solution Approach 1:
The patent applies partial action by adjusting gain only for pixels that are currently active or showing changes, rather than uniformly increasing gain across all pixels. This selective gain adjustment maintains high detection sensitivity for relevant events while avoiding unnecessary amplification of noise in inactive regions, thus preserving output efficiency.
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 enhances the ability to detect and process events by allowing for fine-tuned sensitivity adjustments, improving the detection of changes in electric signals and enhancing the quality of image data capture.
Implementation Method 1
pixels that receive light and that perform photoelectric conversion to generate electric signals
Data Source
AI summary
The present technology relates to a sensor and a control method that can flexibly detect an event that is a change in electric signals of pixels.The sensor includes pixels that receive light and that perform photoelectric conversion to generate electric signals, and an event detecting unit that detects an event that is a change in the electric signals of the pixels. The sensor adjusts, for each of the pixels, a gain of the event detecting unit. The present technology can be applied to, for example, a sensor that detects an event that is a change in electric signals of pixels.