Method for displaying an image on a relief projection surface using a projection system, this method comprising: - the adjustment of the projection system to obtain and store a value of at least one adjustment parameter of this system, - the definition (102; 120) of colours and/or of textures for elementary facets of a computer model defining the relief projection surface, and - the construction (102; 120) of an image to be projected as a function of the computer model, of the colours and/or textures defined for the elementary facets, and of the value stored for the adjustment parameter, - the projection (102; 120) of the constructed image onto the projection surface of a three-dimensional screen made of a translucent material, this screen comprising a front face on which the projected image is displayed and a rear face forming the projection surface, characterized in that: - the adjustment of the projection system comprises the automatic measurement (72, 74, 78, 80, 82), using a fixed camera, of the distance separating virtual reference frame points projected onto the projection surface, from real reference frame points produced on the three-dimensional screen, - the method also comprises: • the acquisition, by the same fixed camera as that used when adjusting the projection system, of an image of the rear face of the three-dimensional screen, • the identification of the position of a finger in contact with the front face of the three-dimensional screen in the acquired image, and • the control of an apparatus as a function of the identified position of the finger. - the adjustment of the projection system to obtain and store a value of at least one adjustment parameter of this system, - the definition (102; 120) of colours and/or of textures for elementary facets of a computer model defining the relief projection surface, and - the construction (102; 120) of an image to be projected as a function of the computer model, of the colours and/or textures defined for the elementary facets, and of the value stored for the adjustment parameter, - the projection (102; 120) of the constructed image onto the projection surface of a three-dimensional screen made of a translucent material, this screen comprising a front face on which the projected image is displayed and a rear face forming the projection surface, characterized in that: - the adjustment of the projection system comprises the automatic measurement (72, 74, 78, 80, 82), using a fixed camera, of the distance separating virtual reference frame points projected onto the projection surface, from real reference frame points produced on the three-dimensional screen, - the method also comprises: • the acquisition, by the same fixed camera as that used when adjusting the projection system, of an image of the rear face of the three-dimensional screen, • the identification of the position of a finger in contact with the front face of the three-dimensional screen in the acquired image, and • the control of an apparatus as a function of the identified position of the finger. - the adjustment of the projection system comprises the automatic measurement (72, 74, 78, 80, 82), using a fixed camera, of the distance separating virtual reference frame points projected onto the projection surface, from real reference frame points produced on the three-dimensional screen, - the method also comprises: • the acquisition, by the same fixed camera as that used when adjusting the projection system, of an image of the rear face of the three-dimensional screen, • the identification of the position of a finger in contact with the front face of the three-dimensional screen in the acquired image, and • the control of an apparatus as a function of the identified position of the finger. • the acquisition, by the same fixed camera as that used when adjusting the projection system, of an image of the rear face of the three-dimensional screen, • the identification of the position of a finger in contact with the front face of the three-dimensional screen in the acquired image, and • the control of an apparatus as a function of the identified position of the finger.