By Shah M.
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18. Correction of pseudoscopic movements for a horizontal displacement Of course, this operation must be carried out for all points of the image, depending on their virtual position and the position of the viewer. This technique is not involved in a virtual reality headset. In that case, in contrast to immersion on a big screen, the screens follow the person’s head. On the other hand, as for immersion on a big screen, it is necessary to follow the head of the user or their point of view to be able to direct the virtual cameras toward the same position and the same orientation as the eyes of the immersed viewer.
21) [MAS 06]. 20. 21. Texture of a curved surface and the translation of its variation in the frequency domain Sakai and Kinkel showed that the human brain seems to follow either variations in peaks or variations in the average of spatial frequencies. 22 shows some textures where only the peak frequencies (left) or the average frequencies (right) vary. The authors remarked that when the textures possess peak frequencies (as on the left side of the figure), it is the variations 20 Eyestrain Reduction in Stereoscopy in peaks that seem to convey more information on the curvature of the surface.
24. 5. Artificial stereoscopic vision We have seen how we use the spacing of our two eyes to perceive depth in everyday life, but that does not yet explain the function of stereoscopic 3D. This technique has the feature of presenting two images to the spectator’s gaze. These are clearly visible if we look at the screen without glasses. One image is directed toward the right eye, while the other is directed toward the left eye. 4, lenticular networks, see Chapter 2). The difference between these methods is not of great importance for the considerations to follow.