公开(公告)号：US11323643B2

公开(公告)日：2022-05-03

申请号：US17275984

申请日：2019-09-10

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Jon S. McElvain ,  Gregory John Ward

IPC: H04N5/355 ,  H04N5/374 ,  H04N5/378 ,  H04N9/04 ,  H04N5/353 ,  G06T3/40 ,  H04N5/3745

Abstract: Imaging methods and devices with pixels divided into pixel groups are disclosed. A pixel group-based global shutter and pixel group-wise staggered long and short exposure followed by readout of two samples per pixel are presented. Example methods and devices for a Bayer color filter array divided into groups of n×n pixels are provided.

公开(公告)号：US10992936B2

公开(公告)日：2021-04-27

申请号：US16680031

申请日：2019-11-11

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Wenhui Jia ,  Ajit Ninan ,  Arkady Ten ,  Gregory John Ward

IPC: H04N19/124 ,  H04N9/77 ,  H04N19/44 ,  H04N5/235 ,  H04N9/67 ,  G06T9/00 ,  H04N19/136 ,  H04N19/169 ,  H04N19/182 ,  H04N19/186 ,  H04N19/30 ,  H04N19/50 ,  H04N19/70

Abstract: Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.

公开(公告)号：US10536689B2

公开(公告)日：2020-01-14

申请号：US16417532

申请日：2019-05-20

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Gregory John Ward ,  Robin Atkins

IPC: H04N13/363 ,  G09G3/00 ,  G09G3/36 ,  H04N9/31 ,  H04N13/337 ,  H04N13/398 ,  G02F1/1333 ,  G09G3/34

Abstract: A projection display system includes a spatial modulator that is controlled to compensate for flare in a lens of the projector. The spatial modulator increases achievable intra-frame contrast and facilitates increased peak luminance without unacceptable black levels. Some embodiments provide 3D projection systems in which the spatial modulator is combined with a polarization control panel.

公开(公告)号：US20190273912A1

公开(公告)日：2019-09-05

申请号：US16417532

申请日：2019-05-20

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Gregory John Ward ,  Robin Atkins

IPC: H04N13/363 ,  H04N9/31 ,  H04N13/337 ,  G09G3/00 ,  G09G3/36 ,  H04N13/398 ,  G02F1/1333

Abstract: A projection display system includes a spatial modulator that is controlled to compensate for flare in a lens of the projector. The spatial modulator increases achievable intra-frame contrast and facilitates increased peak luminance without unacceptable black levels. Some embodiments provide 3D projection systems in which the spatial modulator is combined with a polarization control panel.

公开(公告)号：US10264259B2

公开(公告)日：2019-04-16

申请号：US16011543

申请日：2018-06-18

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Wenhui Jia ,  Ajit Ninan ,  Arkady Ten ,  Gregory John Ward

IPC: H04N9/77 ,  H04N19/124 ,  H04N5/235 ,  H04N19/169 ,  G06T9/00 ,  H04N9/67 ,  H04N19/50 ,  H04N19/30 ,  H04N19/186 ,  H04N19/136 ,  H04N19/44 ,  H04N19/70 ,  H04N19/182

Abstract: Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.

公开(公告)号：US10186211B2

公开(公告)日：2019-01-22

申请号：US15899570

申请日：2018-02-20

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Lorne A. Whitehead ,  Helge Seetzen ,  Gregory John Ward ,  Wolfgang Heidrich

IPC: G09G3/34 ,  G09G3/36 ,  G06T3/40

Abstract: Apparatus and methods are provided that employ one or more of a variety of techniques for reducing the time required to display high resolution images on a high dynamic range display having a light source layer and a display layer. In one technique, the image resolution is reduced, an effective luminance pattern is determined for the reduced resolution image, and the resolution of the effective luminance pattern is then increased to the resolution of the—display layer. In another technique, the light source layer's point spread function is decomposed into a plurality of components, and an effective luminance pattern is determined for each component. The effective luminance patterns are then combined to produce a total effective luminance pattern. Additional image display time reduction techniques are provided.

公开(公告)号：US20180182310A1

公开(公告)日：2018-06-28

申请号：US15899570

申请日：2018-02-20

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Lorne A. Whitehead ,  Helge Seetzen ,  Gregory John Ward ,  Wolfgang Heidrich

IPC: G09G3/34 ,  G09G3/36 ,  G06T3/40

CPC classification number: G09G3/3426 ,  G06T3/4007 ,  G09G3/36 ,  G09G2320/0238 ,  G09G2340/0428

Abstract: Apparatus and methods are provided that employ one or more of a variety of techniques for reducing the time required to display high resolution images on a high dynamic range display having a light source layer and a display layer. In one technique, the image resolution is reduced, an effective luminance pattern is determined for the reduced resolution image, and the resolution of the effective luminance pattern is then increased to the resolution of the—display layer. In another technique, the light source layer's point spread function is decomposed into a plurality of components, and an effective luminance pattern is determined for each component. The effective luminance patterns are then combined to produce a total effective luminance pattern. Additional image display time reduction techniques are provided.

公开(公告)号：US09866813B2

公开(公告)日：2018-01-09

申请号：US14309965

申请日：2014-06-20

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Gregory John Ward ,  Timo Kunkel ,  Scott Daly

IPC: H04N13/02 ,  H04N13/00

CPC classification number: H04N13/111

Abstract: Representation and coding of multi-view images are carried out through tapestry encoding. A tapestry comprises information on a tapestry image, a left-shift displacement map and a right-shift displacement map. Perspective images of a scene can be generated from the tapestry and the displacement maps. The tapestry image is generated from a leftmost view image, a rightmost view image, a disparity map and an occlusion map.

公开(公告)号：US09819938B2

公开(公告)日：2017-11-14

申请号：US15482689

申请日：2017-04-07

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Wenhui Jia ,  Ajit Ninan ,  Arkady Ten ,  Gregory John Ward

IPC: H04N19/124 ,  H04N19/186 ,  H04N19/44 ,  H04N9/77 ,  H04N5/235 ,  H04N19/136 ,  H04N19/182

CPC classification number: H04N19/124 ,  G06T9/00 ,  H04N5/2355 ,  H04N9/67 ,  H04N9/77 ,  H04N19/136 ,  H04N19/169 ,  H04N19/182 ,  H04N19/186 ,  H04N19/30 ,  H04N19/44 ,  H04N19/50 ,  H04N19/70

Abstract: Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.

公开(公告)号：US09810943B2

公开(公告)日：2017-11-07

申请号：US14028341

申请日：2013-09-16

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Lorne A. Whitehead ,  Vincent Kwong ,  Helge Seetzen ,  Gregory John Ward

IPC: H01L33/60 ,  H01L33/58 ,  G02F1/1335

CPC classification number: G02F1/133606 ,  G02F1/133603 ,  G02F1/133605

Abstract: Parallax in an optical device is reduced by apply one or a combination of several disclosed techniques, including reduced solid angle or increased collimation of light sources, increased diffusion/scattering at an output of the device, and/or reflective structures for collimation and containment of reflected light. The techniques are advantageously applied to a backlight LCD display, and particularly to high dynamic range dual modulation displays.