Patent ID: 9712762
Date: 2017-07-18
CPC Classifications: H04N

Claim:
1. A method for detecting a target not emitting in the wavelength region lying between 1 μm and 1.9 μm, the target being in a night sky luminous environment of level 4 or less than 4, comprising: obtaining an image with an imaging device of focal length f and of pupil diameter D, comprising at least one detector comprising types of pixels configured to operate in the wavelength region lying between 1 μm and 1.9 μm, the detectors exhibiting a noise level of less than 0.6×10 and from the image obtained by the device, extracting at least one negative-contrast zone, being a black zone on a bright background corresponding to the presence of the target in the night sky of level less than or equal to 4.