An image sensor, in particular, for endoscopic applications or miniaturized surveillance cameras. The sensor includes a matrix of image points arranged to provide an image of an explored area of which the shape substantially corresponds to the geometry of the matrix. This sensor consists of a matrix of photodetector cells structured in rows and columns, orthogonal to one another, which has a polygonal shape of which the contour has at least five sides that form part of a closed line, with orthogonal edges and oblique edges. This provides a solution to position the column and row address elements which allows each photoconductive cell to be connected to a current or voltage readout circuit, along oblique edges, such that the space beyond the matrix of photodetector elements is not substantially increased along the oblique edges.