Patent ID: 8068006

Claim:
A method of detecting presence and motion for door control devices implementing a camera ( 4 ) for capturing, in at least one spectral zone of visible light or infrared light, digital images including at least one image plane and in analysing the information in at least one image or image plane, comprising: capturing ( 26 ; 60 , 66 ; 80 ) at least one digital image, of at least one floor area ( 56 ) in which the door installation is disposed, in a digital memory in a form of at least one two-dimensional matrix of pixel values which is representative of at least one image signal component (Y; R, G, B; Y, Cr, Cb); executing a compression ( 28 ; 62 ; 86 ) of at least one captured image or image plane so as to adapt the captured image or image plane to a given memory capacity and to a given resolution in the floor area; executing a comparison ( 32 ; 72 ; 92 ; 116 ) of at least one portion of the compressed image or image plane with at least one comparison value established on the basis of an active presence criterion to produce ( 34 ; 74 ; 94 ; 118 , 120 ) an inhibition signal controlling at least one door control device; and deducing from this a door control device control decision, wherein a floor area determination step includes: determining door pillars by producing at least two lines ( 52 , 54 ) representing the pillars; determining a line joining ends of the reproducing lines ( 52 , 54 ) representing the pillars; and dimensioning in the orthogonal direction ( 58 ) a rectangle determining the floor area ( 50 ).