A computer-implemented method (P1, P2) for projecting onto a real workpiece an image calculated from a digital mockup recorded on a digital information server associated with said real workpiece, for the viewing of said workpiece under augmented reality, comprising the following steps: - capture, by a camera, of the image of the real workpiece, - real-time adjustment of the reference frame associated with said digital mockup with the reference frame of the video capture system and the reference frame of the real workpiece, characterised in that it contains a step of reprocessing of said image calculated depending on the topology of said digital mockup and depending on the orientation of the projection means with respect to said real workpiece, wherein the reprocessing step contains detection of a zone of the digital mockup that is offset in depth with respect to a reference plane perpendicular to the axis passing through the focal point of the projector and the barycenter of the real workpiece, and modification of the calculated image in the portions corresponding to said zone, wherein the modification contains a digital correction to compensate for the offset between the projection surface and said reference plane to the pixels of said zones, wherein the correction contains production of an error matrix, formed by the difference between a matrix calculated on the basis of the image acquired from the real workpiece, and a reference matrix corresponding to the topology of the digital mockup repositioned in the same referential, then production of an error criterion and modification of the cells of the reference matrix of the image to be projected that is in the process of being adapted, so as to minimise the error matrix and/or a scalar measure thereof. - capture, by a camera, of the image of the real workpiece, - real-time adjustment of the reference frame associated with said digital mockup with the reference frame of the video capture system and the reference frame of the real workpiece, characterised in that it contains a step of reprocessing of said image calculated depending on the topology of said digital mockup and depending on the orientation of the projection means with respect to said real workpiece, wherein the reprocessing step contains detection of a zone of the digital mockup that is offset in depth with respect to a reference plane perpendicular to the axis passing through the focal point of the projector and the barycenter of the real workpiece, and modification of the calculated image in the portions corresponding to said zone, wherein the modification contains a digital correction to compensate for the offset between the projection surface and said reference plane to the pixels of said zones, wherein the correction contains production of an error matrix, formed by the difference between a matrix calculated on the basis of the image acquired from the real workpiece, and a reference matrix corresponding to the topology of the digital mockup repositioned in the same referential, then production of an error criterion and modification of the cells of the reference matrix of the image to be projected that is in the process of being adapted, so as to minimise the error matrix and/or a scalar measure thereof.