Method for tracking moving individuals in an observation zone through which individuals pass, thereby acquiring a plurality of images of the observation zone by means of a video camera, the following steps being carried out for each acquired image: - extracting a fixed background from the image, - a step a) of detecting zones of pixels "blobs" standing out from the fixed background of the image, - a step b) of detecting the individuals, in which: b1) for each blob, several hypotheses for possible positions are generated within a three-dimensional model of the observation zone by using the features of the camera and a standard size of the individual; and for each possible position, a head of an individual is detected by applying a three-dimensional model of an individual onto the corresponding blob, b2) counting the individuals for each blob, c) for each detected individual, determining the position occupied by this individual, and d) for the set of determined positions, minimizing the overall distance between the positions thus determined in the current image and positions determined during a preceding image method in which the step b1) of detecting a head of an individual is carried out by determining coherences between head and foot positions, in which: - a correspondence is established between pixels of the image and corresponding points of space, - it is assumed that the pixels of a blob correspond to a visible point of an individual and potentially to his feet or of his head, and - these pixels are projected onto the ground planes and planes placed at standard head height, the common projection zone of the feet and of the head being identified as a possible position. - extracting a fixed background from the image, - a step a) of detecting zones of pixels "blobs" standing out from the fixed background of the image, - a step b) of detecting the individuals, in which: b1) for each blob, several hypotheses for possible positions are generated within a three-dimensional model of the observation zone by using the features of the camera and a standard size of the individual; and for each possible position, a head of an individual is detected by applying a three-dimensional model of an individual onto the corresponding blob, b2) counting the individuals for each blob, c) for each detected individual, determining the position occupied by this individual, and d) for the set of determined positions, minimizing the overall distance between the positions thus determined in the current image and positions determined during a preceding image b1) for each blob, several hypotheses for possible positions are generated within a three-dimensional model of the observation zone by using the features of the camera and a standard size of the individual; and for each possible position, a head of an individual is detected by applying a three-dimensional model of an individual onto the corresponding blob, b2) counting the individuals for each blob, c) for each detected individual, determining the position occupied by this individual, and d) for the set of determined positions, minimizing the overall distance between the positions thus determined in the current image and positions determined during a preceding image - a correspondence is established between pixels of the image and corresponding points of space, - it is assumed that the pixels of a blob correspond to a visible point of an individual and potentially to his feet or of his head, and - these pixels are projected onto the ground planes and planes placed at standard head height, the common projection zone of the feet and of the head being identified as a possible position.