Systems and methods of enhancing quality of multiview images using a multimode display
Described herein are system and methods to improve the image quality of a multiview image. In some embodiments a zero disparity plane image is generated based on a view of a multiview by identifying portions of the multiview image that correspond to the zero disparity plane. The zero disparity plane image and view images of the multiview image may be transmitted to a time-multiplexed display. The time-multiplexed display may operate according to a two-dimensional (2D) mode and a multiview mode. The time-multiplexed display may be configured to display the zero disparity plane image and the view images as a composite image.
1. A method of operating a time-multiplexed multimode display, the method comprising:
identifying pixels within a multiview image that correspond to a zero disparity plane of the time-multiplexed multimode display;
generating a zero disparity plane image comprising the identified pixels;
displaying the zero disparity plane image using the time-multiplexed multimode display during a two-dimensional (2D) mode of the time-multiplexed multimode display; and
displaying a set of rendered view images of the multiview image on the time-multiplexed multimode display during a multiview mode of the time-multiplexed multimode display,
wherein the time-multiplexed multimode display is configured to switch between the 2D mode and the multiview mode to sequentially display the zero disparity plane image and the set of rendered view images on the time-multiplexed multimode display as a composite image.
2. The method of operating a time-multiplexed multimode display of claim 1 , wherein the pixels within the multiview image are selected according to pixel locations specified by a disparity map of the multiview image.
3. The method of operating a time-multiplexed multimode display of claim 2 , further comprising generating an image mask from the disparity map based on a predetermined disparity threshold of zero disparity.
4. The method of operating a time-multiplexed multimode display of claim 1 , wherein the set of rendered view images are down-sampled to a multiview resolution of the time-multiplexed multimode display, the zero disparity plane image having a resolution of the set of rendered view images prior to down-sampling.
5. The method of operating a time-multiplexed multimode display of claim 1 , wherein the rendered view images are generated by removing the identified pixels from the multiview image to provide a luminance curve match between image content of the zero disparity plane image and the set of rendered view images within the composite image.
6. The method of operating a time-multiplexed multimode display of claim 1 , the method further comprising:
providing broad-angle emitted light during the 2D mode using a broad-angle backlight;
providing directional emitted light during a multiview mode using a multiview backlight having an array of multibeam elements, the directional emitted light comprising a plurality of directional light beams provided by each multibeam element of the multibeam element array; and
time multiplexing the 2D mode and the multiview mode using a mode controller to sequentially activate the broad-angle backlight during a first sequential time interval corresponding to the 2D mode and the multiview backlight during a second sequential time interval corresponding to the multiview mode,
wherein directions of directional light beams of the directional light beam plurality correspond to different view directions of the set of rendered view images.
7. The method of operating a time-multiplexed multimode display of claim 6 , wherein providing directional emitted light comprises:
guiding light in a light guide as guided light; and
scattering out a portion of the guided light as the directional emitted light using multibeam elements of the multibeam element array, each multibeam element of the multibeam element array comprising one or more of a diffraction grating, a micro-refractive element, and a micro-reflective element.
8. The method of operating a time-multiplexed multimode display of claim 7 , further comprising providing light to the light guide, the guided light within the light guide being collimated according to a predetermined collimation factor.
9. The method of operating a time-multiplexed multimode display of claim 6 , further comprising:
modulating the broad-angle emitted light using an array of light valves to display the zero disparity plane image during the 2D mode; and
modulating the plurality of directional light beams of the directional emitted light using the light valve array to display a multiview image during the multiview mode.
10. The method of operating a time-multiplexed multimode display of claim 9 , wherein a size of a multibeam element of the multibeam element array is between one quarter and two times a size of a light valve of the light valve array.
11. The method of operating a time-multiplexed multimode display of claim 1 , further comprising applying a feather mask to one or both of the zero disparity plane image and the rendered view images of the multiview image.
12. A method of multiview image segmentation, the method comprising:
generating an image mask from a disparity map of a multiview image, the image mask specifying pixel locations that correspond to a zero disparity plane of a rendering of the multiview image;
generating a zero disparity plane image using the image mask and the multiview image;
displaying the zero disparity plane image using the time-multiplexed multimode display during a two-dimensional (2D) mode of the time-multiplexed multimode display; and
displaying a set of rendered view images of the multiview image on the time-multiplexed multimode display during a multiview mode of the time-multiplexed multimode display,
wherein the time-multiplexed multimode display is configured to switch between the 2D mode and the multiview mode to sequentially display the zero disparity plane image and the set of rendered view images on the time-multiplexed multimode display as a composite image.
13. The method of multiview image segmentation of claim 12 , further comprising generating the image mask from the disparity map based on a predetermined disparity threshold of zero disparity.
14. The method of multiview image segmentation of claim 12 , wherein the set of rendered view images are down-sampled to a multiview resolution of the time-multiplexed multimode display, the zero disparity plane image having a resolution of the set of rendered view images prior to down-sampling.
15. The method of multiview image segmentation of claim 12 , wherein the set of rendered view images are generated by removing pixels from the multiview image according to the image mask.
16. The method of multiview image segmentation of claim 12 , further comprising applying a feather mask to one or both of the zero disparity plane image and the set of rendered view images.
17. A multiview image display system, the system comprising:
a processor; and
a memory that stores a plurality of instructions, when executed by the processor, cause the processor to:
receive a multiview image and a disparity map that associates disparity between different views of the multiview image;
generate a zero disparity plane image by selecting pixels from the multiview image according to disparity values specified by the disparity map; and
transmit the zero disparity plane image and a set of view images of the multiview image to a time-multiplexed display, the time-multiplexed display configured to display a composite image by rendering the set of view images in a multimode display and rendering the zero disparity plane image in a two-dimensional (2D) display mode.
18. The multiview image display system of claim 17 , wherein the plurality of instructions, when executed by the processor, further cause the processor to generate an image mask from the disparity map based on a predetermined disparity threshold of zero disparity.
19. The multiview image display system of claim 18 , wherein the set of view images are generated by removing pixels from the multiview image according to the image mask.
20. The multiview image display system of claim 17 , wherein the plurality of instructions, when executed by the processor, further cause the processor to apply a feather mask to one or both of the zero disparity plane image and the set of view images.