Method for displaying a comfort-increasing and especially anti-motion-sickness visual reference

Method for displaying a visual reference in an image displayed by a visualization device masking all or part of the field of vision of a user, said visualization device moreover containing at least one motion sensor, wherein the method contains the steps of:

• defining a virtual tube around a central axis of vision of the user, a distal opening of the tube corresponding to a focused visual field of the user, and the walls of the tube corresponding to the peripheral visual field of the user,
• defining at least one frame corresponding to an intersection between the virtual tube and a plane intersecting the central axis of vision,
• defining lines corresponding to the intersections between planes passing through the central axis of vision and the walls of the tube,
• creating a three-dimensional image corresponding to the at least one frame and to the lines, and displaying said three-dimensional image as an overlay in a displayed image in order to have a visual reference in said displayed image;
• in which the three-dimensional image is modified in response to the measurement of a rotational movement by the at least one motion sensor, said measured rotational movement being broken down into a rotation measured around the central axis of vision and at least one rotation measured around an axis perpendicular to the central axis of vision, the method moreover containing the steps of:
• modifying the at least one frame by applying a rotational movement to the intersecting plane corresponding to said frame, said rotational movement being contrary to the at least one rotation measured around the axis perpendicular to the central axis of vision,
• displacing the lines around the central axis of vision according to a rotational movement contrary to the rotation measured around the central axis of vision.