Adaptive Leaky Integrator for Flashing-Light Image Artefacts
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Solution Overview
Problem
Conventional leaky integrators fail to adequately attenuate visible artefacts in images rendered on displays when dealing with scenes containing lights flashing periodically or entering/leaving with frequencies around 1 Hz, as they do not selectively dampen periodic oscillations based on their frequency and duty cycle.
Innovation Solution
A method and apparatus for operating a leaky integrator that generates an output signal by integrating a leaked signal, where the leaked signal is obtained by multiplying a dampening signal, a leak factor, and the difference between the input and output signals, with the dampening signal varying based on the presence of periodic oscillations, duty cycle, and frequency, to selectively dampen periodic oscillations more than aperiodic ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional leaky integrator is used to filter signals, then sudden changes are avoided, but visible artefacts from periodic oscillations are not adequately attenuated
Solution Approach 1:
The leak factor is changed from a fixed value to a dynamic value that varies over time based on the detected oscillation characteristics. The system continuously monitors the input signal for periodic oscillations and adjusts the leak factor accordingly, making the integrator adaptive to different signal conditions rather than using a static configuration
Solution Approach 2:
The system changes the parameter (leak factor) of the leaky integrator based on detected signal characteristics. When periodic oscillations are detected within a specific frequency range, the leak factor is adjusted to a first value optimized for attenuating such oscillations, whereas a second different value is used for other signal conditions
2Object-affected harmful factors
If the leak factor is increased to attenuate periodic oscillations, then artefacts are reduced, but aperiodic signal changes are overly dampened
Solution Approach 1:
The system applies different processing characteristics to different types of signals by detecting their temporal patterns. Periodic oscillations within the specific frequency range receive one level of dampening (first leak factor), while aperiodic signals receive a different level of dampening (second leak factor), allowing localized optimization for each signal type
3Ease of manufacture
If a fixed leak factor is used, then the integrator is simple to implement, but it cannot selectively dampen different types of oscillations
Solution Approach 1:
The leaky integrator system performs self-adjustment by automatically detecting the characteristics of incoming signals and modifying its own leak factor accordingly. The system monitors its own input for periodic oscillations and autonomously changes its damping behavior without requiring external control or complex manual configuration
Data Source
AI summary
The present disclosure relates to receiving an input signal; generating an output signal by integrating a leaked signal over an integration time, wherein the leaked signal is obtained based on a dampening signal, a leak factor and the input signal; and providing the output signal.