A method of processing a signal from an event-based sensor, the event-based sensor having an array of sensing elements facing a scene, the method comprising: receiving the signal including, for each sensing element, successive events originating from said sensing element depending on variations of incident light from the scene; analyzing the signal to detect a frequency pattern in a light profile sensed by at least one sensing element; and extracting information from the scene in response to detection of the frequency pattern, wherein each event from the successive events comprises a time of occurrence (t) and a luminance attribute (p) corresponding to a variation of incident light and corresponding to a polarity of the event, depending if the incident light increases or decreases, light, and wherein analyzing the signal comprises: extracting from the signal successive bursts of events originating from at least one sensing element, each burst consisting of events having luminance attributes that correspond to variations of incident light of a same polarity; and detecting the frequency pattern based on timing of the successive bursts, wherein analyzing the signal further comprises filtering events received in the signal, the successive bursts of events being extracted (30; 40) from the signal after filtering, and wherein the filtering comprises, upon receiving a new event originating from a sensing element of the event-based sensor: discarding the new event if the time of occurrence (t) of the new event is more than a memorized time of occurrence (t') of a preceding event from the same sensing element plus a time threshold (δt max); discarding the new event if the luminance attribute (p) of the new event and a memorized luminance attribute (p') of the preceding event from the same sensing element correspond to variations of incident light of opposite polarity; and memorizing the time of occurrence and the luminance attribute of the new event for filtering a next event from the same sensing element. receiving the signal including, for each sensing element, successive events originating from said sensing element depending on variations of incident light from the scene; analyzing the signal to detect a frequency pattern in a light profile sensed by at least one sensing element; and extracting information from the scene in response to detection of the frequency pattern, wherein each event from the successive events comprises a time of occurrence (t) and a luminance attribute (p) corresponding to a variation of incident light and corresponding to a polarity of the event, depending if the incident light increases or decreases, light, and wherein analyzing the signal comprises: extracting from the signal successive bursts of events originating from at least one sensing element, each burst consisting of events having luminance attributes that correspond to variations of incident light of a same polarity; and detecting the frequency pattern based on timing of the successive bursts, extracting from the signal successive bursts of events originating from at least one sensing element, each burst consisting of events having luminance attributes that correspond to variations of incident light of a same polarity; and detecting the frequency pattern based on timing of the successive bursts, wherein analyzing the signal further comprises filtering events received in the signal, the successive bursts of events being extracted (30; 40) from the signal after filtering, and wherein the filtering comprises, upon receiving a new event originating from a sensing element of the event-based sensor: discarding the new event if the time of occurrence (t) of the new event is more than a memorized time of occurrence (t') of a preceding event from the same sensing element plus a time threshold (δt max); discarding the new event if the luminance attribute (p) of the new event and a memorized luminance attribute (p') of the preceding event from the same sensing element correspond to variations of incident light of opposite polarity; and memorizing the time of occurrence and the luminance attribute of the new event for filtering a next event from the same sensing element. discarding the new event if the time of occurrence (t) of the new event is more than a memorized time of occurrence (t') of a preceding event from the same sensing element plus a time threshold (δt max); discarding the new event if the luminance attribute (p) of the new event and a memorized luminance attribute (p') of the preceding event from the same sensing element correspond to variations of incident light of opposite polarity; and memorizing the time of occurrence and the luminance attribute of the new event for filtering a next event from the same sensing element.