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Parallax barriers and lenticular lenses. (a) Top view of a parallax barrier display, composed of 4 different angular images (color coded). A viewer at the primary viewing zone can see 3 stereo images when shifting his head horizontally. A viewer at a secondary viewing zone can see the same 3 stereo images with a pixel shift. However, if the viewer's left and right eyes fall in different zones, transition artifacts are observed. (b) To improve light efficiency, parallax barriers can be replaced with lenslets.
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While 3D movies are gaining popularity, viewers in a 3D cinema still need to wear cumbersome glasses in order to enjoy them. Automultiscopic displays provide a better alternative to the display of 3D content, as they present multiple angular images of the same scene without the need for special eyewear. However, automultiscopic displays cannot be d...
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... A parallax barrier, an array of vertical blocking slits, is placed in front of the screen. Due to the slit occlusion, one can observe different screen pixels from different viewpoints. When the viewer is located at the proper distance, every eye sees only columns belonging to one of the angular images and hence stereo perception is achieved (Fig. 2a). The light efficiency of parallax barriers can be improved if they are replaced with lenticular sheets (Fig. 2b). While for sim- plicity we consider barriers here, all observations hold for lenticular sheets as ...
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... occlusion, one can observe different screen pixels from different viewpoints. When the viewer is located at the proper distance, every eye sees only columns belonging to one of the angular images and hence stereo perception is achieved (Fig. 2a). The light efficiency of parallax barriers can be improved if they are replaced with lenticular sheets (Fig. 2b). While for sim- plicity we consider barriers here, all observations hold for lenticular sheets as ...
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... between the eyes, an observer can move horizontally without destroying stereo perception. Moreover, as illustrated in Fig. 2a, the main viewing zone produced by parallax barriers is essentially replicated, and an observer in secondary viewing zones can see the exact same content. However, depth reversal artifacts occur at the boundaries, when the left eye sees the rightmost angular image from one zone and the right eye the leftmost angular image of the next ...
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... display to see a different subset of the display's native pixels. Other approaches use eye tracking to improve the degree of movement and allow for multiple viewers by using dynamic parallax barriers [Yi et al. 2008;Peterka et al. 2008]. Du et al. [2014] manipulate the light field presented such that the tran- sitions between two viewing zones ( Fig. 2a) would appear smooth, thus viewers can move continuously in space without experiencing transitions artifacts. Although this solution extends the supported range of screen distances in the room, it limits the suitable ...
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... (1 and k) have a bad quality and the artifacts are reduced in the middle of the angular viewing zone. For this reason we chose the number of angular images k = 9 to be large enough to allow each viewer sufficient space for free head motion before hitting the boundary artifacts. A second observation is that viewers located in the central seats (Fig. 12a) experience the best quality, but even viewers at the extreme leftmost/rightmost seats (Fig. 12b) have a sufficient set of good-quality angular positions. Fig. 12c emphasizes the degraded quality of the simple lenticular sheet display. Artifacts increase as the viewer moves further from the distance at which the display was designed. ...
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... zone. For this reason we chose the number of angular images k = 9 to be large enough to allow each viewer sufficient space for free head motion before hitting the boundary artifacts. A second observation is that viewers located in the central seats (Fig. 12a) experience the best quality, but even viewers at the extreme leftmost/rightmost seats (Fig. 12b) have a sufficient set of good-quality angular positions. Fig. 12c emphasizes the degraded quality of the simple lenticular sheet display. Artifacts increase as the viewer moves further from the distance at which the display was designed. Table 2 in Supplementary Appendix E provides the numerical values of the TG score, reinforcing the ...
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... to be large enough to allow each viewer sufficient space for free head motion before hitting the boundary artifacts. A second observation is that viewers located in the central seats (Fig. 12a) experience the best quality, but even viewers at the extreme leftmost/rightmost seats (Fig. 12b) have a sufficient set of good-quality angular positions. Fig. 12c emphasizes the degraded quality of the simple lenticular sheet display. Artifacts increase as the viewer moves further from the distance at which the display was designed. Table 2 in Supplementary Appendix E provides the numerical values of the TG score, reinforcing the above ...
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... In preceding discussions we had assumed lenslets to have no optical aberrations, which is unattainable in practice. Though effects of chromatic aberrations are often reported as being minor with regards to lenticular lenses [50] (this is consistent with our experiences with integral illumination), other types of aberrations can visibly affect simulation quality and exacerbate issues of focusing ability, viewing angle, etc. ...
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