Abstract
A new bio-inspired pixel concept is proposed. It can compute the spatial contrast and provide intensity images. The pixel sends spikes to communicate with its neighbors, computing the spatial contrast. Its expected fixed-pattern noise within neuromor- phic arrays is 1% without using calibration. Its fill factor is 8.5%. Furthermore, the pixel has two different readout modes: pulse density modulation and time to first spike. The user can toggle any time between operation and readout modes, depending on the desired image quality and the bandwidth and power consumption requirements. The pixel has been implemented in AMS4M2P 0.35-μm CMOS technology. Experimental results are provided. Index Terms—Address event representation (AER), asyn- chronous vision sensors, bio-inspired vision, spatial contrast.
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