Patent ID: 11875545
Assignee: GENSIGHT BIOLOGICS
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  A  H | IPC A  G

Claim 9:
10. A computer program product comprising stored instructions to be executed in a processor associated with a light sensor having a matrix of sensing elements, wherein execution of the instructions by the processor controls steps of:
receiving, from each sensing element of the matrix, a respective event-based signal sequence including events asynchronously produced as a function of variations of light incident on the sensing element and light level values respectively associated with at least some of the events;
generating an image comprising pixels corresponding spatially to the sensing elements of the matrix; and
repeatedly determining a set of edge pixels among the pixels of the image,
wherein generating the image comprises updating each pixel of the image based on a light level value associated with a most recent event in the event-based signal sequence received from the sensing element corresponding to said pixel of the image,
wherein determining the set of edge pixels comprises:
selecting pixels of the image, wherein the selected pixels comprise pixels of the image corresponding to sensing elements from which the received event-based signal sequences include at least one event after a previous determination of the set of edge pixels, and pixels of the previously determined set of edge pixels;
evaluating respective local contrast measures with respect to the selected pixels of the image; and
deciding whether or not the selected pixels belong to the set of edge pixels based on the evaluated local contrast measures.