An eye-friendly dual-view projection system using temporal psychovisual modulation
In this paper, we propose an enhanced projector using the emergent display technology of Temporal Psycho-Visual Modulation (TPVM) which exploits the difference in image formation mechanisms of human eyes and imaging sensors. The projector have two significant advantages compared to traditional projector: 1) parts of the information (e.g., speech notes) projected can be hidden from the audience but the speaker can see the hidden parts; 2) the speaker's eyes can be protected from exposing to the light emitter directly. In the proposed system, every projected image is split into two subimages, where one contains both the original and hidden information, and another is opposite to the first subimage to achieve the purpose of hiding some information. To avoid the harmful stimulation from projection light to eyes, the enhanced projector detect the position of the speaker's face and adaptively modify the subimages to protect the speaker's eyes from directly exposing to the light source. The proposed prototype system uses the traditional projectors which support 3D display mode, and the proposed eye-protecting and information-hiding scheme is implemented by software. So it is transportable and practicable.