Patent ID: 8194131

Claim:
A capture device for capturing a silhouette ( 100 ), comprising: (a) a wall ( 132 ); (b) a vision device ( 130 ) provided for capturing at least one image of the said wall ( 132 ) comprising a camera ( 104 ) whose lens is oriented towards the wall ( 132 ) and an illumination device ( 134 ) designed to illuminate the wall ( 132 ) in that the illumination device ( 134 ) emits in the infrared range and in that the camera ( 104 ) is an infrared camera; and (c) a processing unit ( 136 ) connected to the said vision device ( 130 ) in order to analyze the or each image captured and to detect the silhouette of an individual passing between the said wall ( 132 ) and the said vision device ( 130 ); the capture device ( 100 ) being such that the wall ( 132 ) comprises a transparent wall ( 116 ) and a plurality of patterns ( 106 ) positioned on the said transparent wall ( 116 ) and exhibiting a contrast with the said transparent wall ( 116 ).