Patent ID: 8818083

Claim:
A system ( 1 ) of remotely controlled drones ( 10 , 12 ) fitted with respective cameras ( 14 ) enabling a virtual shot from an assailant drone ( 12 ) at a target drone ( 10 ) to be validated by recognizing the target drone ( 10 ) in a video image ( 17 ) supplied by the camera ( 14 ) of the assailant drone ( 12 ) while firing a virtual shot, the system being characterized in that the recognition means comprise a beacon ( 15 , 16 ) arranged on the target drone ( 10 ) and covered in two first strips ( 18 ) of a first color reflecting light at a first wavelength, situated on either side of at least one second strip ( 19 , 20 ) of a second color reflecting light at a second wavelength, different from the first; in that the emission spectrum of the first color of the two first strips ( 18 ) lies in the range 590 nm to 745 nm, while the emission spectrum of at least one second strip ( 19 , 20 ) lies in the range 445 nm to 565 nm, and the assailant drone comprising means for analyzing the image taken while firing a virtual shot that comprises the following means: means for detecting a first pixel of the first color in the image; means for detecting a first group of pixels of said first color including the previously-detected pixel; means for detecting a group of pixels of the second color in the vicinity of the first group of pixels of the first color; means for recognizing a second group of pixels of the first color; and means for verifying recognition and consistency conditions amongst the detected groups of pixels.