AUTONOMOUSLY GUIDED MACHINE

The invention relates to an autonomously guided machine (10) comprising at least a steering body and a steering mechanism (13), said machine also comprising: a guide system (11) including an optical filter (17) which has a receiving surface exposed to the exterior and which can transmit light rays directed substantially in one direction and eliminate other light rays; a screen (18) that receives the filtered light; a digital camera (19) for capturing pixel resolution images of the screen (18); a pre-processing element for selecting the pixels corresponding to an incident planar laser beam received by the guide system (11), and filtered and projected onto the screen (18), and for generating a response detection image; a line generator for generating an estimate J of the coordinates of the detected lines based on the response detection image, involving the processing of the pixel columns pixels; and a locator which receives the estimate of the coordinates of the detected lines and calculates values representative of pixel columns based on said estimate and on parameters of the guide system (11), and subsequently calculates a distance yw from the guide system (11) to the planar laser beam in order to control the steering mechanism (13) so as to minimise this distance yw.