Signal processing device, imaging device, and signal processing method

Abstract

A signal processing device according to one aspect of the present disclosure includes an acquisition unit, a counter, and a threshold changing unit. The acquisition unit acquires, of a plurality of electrical signals generated by a plurality of photoelectric conversion elements in response to incident light, a signal whose signal change amount exceeds a predetermined threshold as an event signal. The counter counts, of a plurality of event signals acquired by the acquisition unit, signals corresponding to noise. The threshold changing unit changes the threshold on the basis of the number of noise events obtained by the counter.