A 128×128 Electronically Multi-Foveated Dynamic Vision Sensor With Real-Time Resolution Reconfiguration
This paper presents the design and implementation of a 128 × 128 electronically foveated dynamic vision sensor (EF-DVS) fabricated using 350 nm CMOS technology. The EF-DVS integrates a novel pixel grouping approach that permits real-time dynamic resolution adjustments via external digital signals. P...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/168921 |
| Acceso en línea: | https://hdl.handle.net/11441/168921 https://doi.org/10.1109/ACCESS.2024.3519035 |
| Access Level: | acceso abierto |
| Palabra clave: | Foveated dynamic vision sensor Pixel grouping Macro-pixel Foveated vision Multi-fovea |
| Sumario: | This paper presents the design and implementation of a 128 × 128 electronically foveated dynamic vision sensor (EF-DVS) fabricated using 350 nm CMOS technology. The EF-DVS integrates a novel pixel grouping approach that permits real-time dynamic resolution adjustments via external digital signals. Previous approaches rely on physically crafting high- and low-resolution regions, which require a mechanical setup for tracking moving objects within the fovea. Here, our innovation supports flexible and fast operation modes, acting on amplified photocurrents, allowing the sensor to operate in both highresolution and low-resolution settings, and to configure multiple high-resolution regions of interest (ROIs) with arbitrary shapes and sizes within the pixel array in real-time. Although the pixel circuitry is more complex than its un-foveated predecessor, we have kept the same pixel area, sacrificing slightly fixed pattern noise (FPN). The sensor achieves a latency of 3.66 μs and demonstrates a contrast sensitivity down to 1.03%. It maintains a dynamic range exceeding 120 dB and an intra-scene dynamic range above 60 dB. Notably, the power consumption is reduced with respect to its predecessor, down to 0.7mWat 100 Keps when configured in low-resolution mode with a 2 × 2 pixel grouping. The ability to dynamically adjust spatial resolution reduces noise event rates, enhances sensitivity, and lowers both data bandwidth and processing requirements. These features make the EF-DVS a suitable candidate for applications in robotics, surveillance, and real-time monitoring systems where efficient data processing and low latency are critical. |
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