Abstract: A blade pitch measuring device of an un-ducted fan of a turbomachine, the fan including a hub, at least one platform rotatable with respect to the hub and at least one blade mounted on the platform, the device includes at least one first visual marker attached to the platform, at least one second visual marker attached to the hub, the first and the second visual marker forming a pattern which evolves depending on the pitch of the blade, and at least one optical acquisition device, the optical acquisition device being configured to capture an image of the pattern so as to deduce from it the pitch of the blade.

Abstract: A method for estimating the image depth map of a scene, includes the following steps: providing (E1) an image, the focus of which depends on the depth and wavelength of the considered object points of the scene, using a longitudinal chromatic optical system; determining (E2) a set of spectral images from the image provided by the longitudinal chromatic optical system; deconvoluting (E3) the spectral images to provide estimated spectral images with field depth extension; and analyzing (E4) a cost criterion depending on the estimated spectral images with field depth extension to provide an estimated depth map.