Towards a physically realistic computationally efficient DVS pixel model

TL;DR

This paper introduces a new DVS pixel model that combines physical realism with computational efficiency, enabling better simulation of HDR scenes with realistic noise characteristics.

Contribution

The paper presents a novel DVS pixel model based on differential equations and stochastic event generation, improving realism and efficiency over previous models.

Findings

Enhanced realism in HDR scene simulation

Significant reduction in computational time

Accurate noise modeling with larger timesteps

Abstract

Dynamic Vision Sensor (DVS) event camera models are important tools for predicting camera response, optimizing biases, and generating realistic simulated datasets. Existing DVS models have been useful, but have not demonstrated high realism for challenging HDR scenes combined with adequate computational efficiency for array-level scene simulation. This paper reports progress towards a physically realistic and computationally efficient DVS model based on large-signal differential equations derived from circuit analysis, with parameters fitted from pixel measurements and circuit simulation. These are combined with an efficient stochastic event generation mechanism based on first-passage-time theory, allowing accurate noise generation with timesteps greater than 1000x longer than previous methods