Autostereoscopic pixel arrangement techniques
View Patent ↗An autostereoscopic display system wherein an interdigitated stereogram is generated and displayed on an electronic display. The display includes a lenticular screen over the surface of the display which allows the user to observe the stereogram on the display and obtain a true stereoscopic effect. In accord with the invention, the resolution of master images is minimized and then the pixels from the master images are mapped to form the interdigitated stereogram. The optimum minimization of the resolution is obtained when the ratio of horizontal resolution to vertical resolution for the master images approximates the screen aspect ratio of the display. In this way, less computation is involved in remapping the pixels to form an interdigitated stereogram.
1. A method for generating content for an autostereoscopic display, comprising the steps of:
obtaining a plurality of master images,
reducing resolution of each master image to be a fraction of the resolution of the autostereoscopic display, where the autostereoscopic display has a predefined screen aspect ratio, and wherein said reducing comprises generating each reduced resolution master image based on a quantity of master images obtained, wherein a ratio of horizontal resolution to vertical resolution for each reduced resolution master image approximates the predefined screen aspect ratio, and
mapping selected pixels from the reduced resolution master images to form an interdigitated stereogram, wherein pixels are selected from each reduced resolution master image in correspondence with their position under a lenticule in the interdigitated stereogram; and
wherein the quantity of master images obtains is N, and for a master image having dimension X by Y, a corresponding reduced resolution master image has a dimension of approximate proportion X/√N by Y/√N.
2. A method as in claim 1 , further comprising enhancing the contrast of adjacent pixels in the master images.
3. A method as in claim 1 , wherein the autostereoscopic display is operable to display stereoscopic images having a resolution of X by Y pixels.
4. A method as in claim 1 , wherein the autostereoscopic display is operable to display N views.
5. A method for generating content for an autostereoscopic display, comprising the steps of:
obtaining a plurality of master images;
reducing resolution of each master image to be a fraction of the resolution of the autostereoscopic display, where the autostereoscopic display has a predefined screen aspect ratio, and wherein said reducing comprises generating each reduced resolution master image based on a quantity of master images obtained, wherein a ratio of horizontal resolution to vertical resolution for each reduced resolution master image approximates the predefined screen aspect ratio; and
mapping selected pixels from the reduced resolution master images to form an interdigitated stereogram, wherein pixels are selected from each reduced resolution master image in correspondence with their position under a lenticule in the interdigitated stereogram; and
wherein the master image C having a pixel in position L is given by C=(1−L)×(N−1), where L represents the far left-eye view and where N represents the far right-eye view.
6. An auto stereoscopic display system for generating stereoscopic images having a resolution of X by Y pixels, comprising:
N cameras each generating a master image having a resolution of approximately X/√N by Y/√N;
a pixel mapper electronically coupled to the cameras, whereby selected pixels from each master image are interdigitated to form an interdigitated stereogram; and
an electronic display coupled to the pixel mapper and having a lenticular screen coupled to a surface of the display.
7. An autostereoscopic display system as in claim 6 , wherein the autostereoscopic display has a predefined screen aspect ratio, further comprising a reducer for generating each master image to have a ratio of horizontal resolution to vertical resolution approximating the screen aspect ratio.
8. An auto stereoscopic display system as in claim 6 , wherein a master image C having a pixel in position L is given by C=(1−L)×(N−1), where L represents the far left-eye view and where N represents the far right-eye view.
9. An autostereoscopic display system as in claim 6 , wherein a range of master images C 1 to C 2 each having a pixel in position L is given by C 1 =(1−L 1 )×(N−1) and C 2 =(1−L 2 )×(N−1), where L represents the far left-eye-view; N represents the far right-eye view; L 1 =L−R/2 and L 2 =L+R/2; and R=the horizontal width of the pixel relative to the horizontal width of the lenticule.
10. An autostereoscopic display system as in claim 9 , wherein R=the horizontal width of a sub-pixel.
11. An auto stereoscopic display system as in claim 9 , wherein R is wider than the horizontal width of the pixel.
12. An autostereoscopic display system as in claim 9 , wherein R is wider than the horizontal width of the pixel.
13. A method for generating content for an autostereoscopic display, comprising the steps of:
obtaining a plurality of master images;
reducing resolution of each master image to be a fraction of the resolution of the autostereoscopic display, where the autostereoscopic display has a predefined screen aspect ratio, and wherein said reducing comprises generating each reduced resolution master image based on a quantity of master images obtained, wherein a ratio of horizontal resolution to vertical resolution for each reduced resolution master image approximates the predefined screen aspect ratio; and
mapping selected pixels from the reduced resolution master images to form an interdigitated stereogram, wherein pixels are selected from each reduced resolution master image in correspondence with their position under a lenticule in the interdigitated stereogram; and
wherein a range of master images C 1 to C 2 each having a pixel in position L is given by C 1 =(1−L 1 )×(N−1) and C 2 =(1−L 2 )×(N−1), where L represents the far left-eye-view; N represents the far right-eye view; L 1 =L−R/2 and L 2 =L+R/2; and R=the horizontal width of the pixel relative to the horizontal width of the lenticule.
14. A method as in claim 13 , wherein R=the horizontal width of a sub-pixel.
15. A method as in claim 13 , wherein R is narrower than the horizontal width of the pixel.
16. A method as in claim 13 , wherein R is wider than the horizontal width of the pixel.
17. An autostereoscopic display for generating stereoscopic images having a resolution of X by Y pixels, comprising:
N cameras each generating a master image;
a mapper selecting pixels from each master image based on pixel position and interdigitating the pixels to form an interdigitated stereogram; and
an electronic display coupled to the mapper and having a lenticular screen coupled to a surface of the display;
wherein the mapper is configured to form the interdigitated stereogram based on N, and wherein each master image has a dimension of approximate proportion X/√N by Y/√N.
18. An autostereoscopic display system as in claim 17 , wherein pixels are selected using a best fit method.
19. An autostereoscopic display system as in claim 17 , wherein pixels are selected using an averaging method.