An event-based image sensor comprising a controller, an address-event representation circuitry, and a plurality of pixel circuits forming a pixel array, the controller connected to each pixel circuit to control said pixel circuits, each pixel circuit comprising: - a photoreceptor circuit comprising a light-sensitive element and having an output, said photoreceptor circuit being configured for delivering at said output a photoreceptor current (I PRout) derived from a light impinging on the light-sensitive element, - an analog bus selectively connected to a readout unit, the output of the photoreceptor circuit being selectively connected to said analog bus, - a bank of current memory cells connected to the analog bus, each current memory cell (IS i) being adapted to selectively store an electric current flowing in the analog bus and to selectively deliver into said analog bus an electric current stored within said current memory cell (IS i); wherein each pixel circuit comprises a current comparator configured for detecting a change in the photoreceptor current (I PRout), said current comparator comprising: - a current sign detector connected to the analog bus and configured for determining a sign of a value of an electric current flowing in the analog bus resulting from a compared electric current and a threshold current, said compared electric current resulting from a difference between at least the photoreceptor current and a previous photoreceptor current stored in a current memory cell, - at least one storage cell (53, 54) connected to an output of the current sign detector and having a state conditioned by the output of said current sign detector, the state of said at least one storage cell (53, 54) being representative of a change between the photoreceptor current and the previous photoreceptor current greater than the threshold current; wherein said at least one digital storage cell (53, 54) is connected to the address-event representation circuitry so that the address-event representation circuitry monitors the state of the storage cell (53, 54) to determine a change in the light impinging on the light-sensitive element, and wherein a readout of a pixel circuit through the connection of the analog bus to the readout unit is conditioned by the state of said at least one digital storage cell (53, 54). - a photoreceptor circuit comprising a light-sensitive element and having an output, said photoreceptor circuit being configured for delivering at said output a photoreceptor current (I PRout) derived from a light impinging on the light-sensitive element, - an analog bus selectively connected to a readout unit, the output of the photoreceptor circuit being selectively connected to said analog bus, - a bank of current memory cells connected to the analog bus, each current memory cell (IS i) being adapted to selectively store an electric current flowing in the analog bus and to selectively deliver into said analog bus an electric current stored within said current memory cell (IS i); - a current sign detector connected to the analog bus and configured for determining a sign of a value of an electric current flowing in the analog bus resulting from a compared electric current and a threshold current, said compared electric current resulting from a difference between at least the photoreceptor current and a previous photoreceptor current stored in a current memory cell, - at least one storage cell (53, 54) connected to an output of the current sign detector and having a state conditioned by the output of said current sign detector, the state of said at least one storage cell (53, 54) being representative of a change between the photoreceptor current and the previous photoreceptor current greater than the threshold current;