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公开(公告)号：US20250133224A1
公开(公告)日：2025-04-24
申请号：US18833245
申请日：2023-02-01
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Ajit Ninan , Gregory John Ward
Abstract: A sequence of base layer images for a base reference image display and a set of one or more sequences of beta scale maps corresponding to one or more non-base reference image displays are generated. A subset of one or more sequences of beta scale maps is determined in the set of one or more sequences of beta scale maps based at least in part on display capabilities of a target image display. The sequence of base layer images, along with the subset of one or more sequences of beta scale maps, is encoded into a video signal to cause a recipient device of the video signal to generate a sequence of display images from the sequence of base layer images and the subset of one or more sequences of beta scale maps for rendering on the image display.
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公开(公告)号：US10511837B2
公开(公告)日：2019-12-17
申请号：US16363024
申请日：2019-03-25
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Wenhui Jia , Ajit Ninan , Arkady Ten , Gregory John Ward
IPC: H04N19/124 , H04N19/136 , H04N19/169 , H04N19/44 , H04N5/235 , H04N9/67 , H04N9/77 , G06T9/00 , 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.
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公开(公告)号：US10469871B2
公开(公告)日：2019-11-05
申请号：US14964862
申请日：2015-12-10
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Guan-Ming Su , Gregory John Ward , Timo Kunkel , Scott Daly , Samir N. Hulyalkar
IPC: H04N19/597 , H04N13/161 , H04N19/30 , H04N19/17
Abstract: Representation and coding of multi-view images using tapestry encoding are described for standard and enhanced dynamic ranges compatibility. 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. Different methods for achieving compatibility are described.
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公开(公告)号：US10306216B2
公开(公告)日：2019-05-28
申请号：US16154336
申请日：2018-10-08
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Gregory John Ward , Robin Atkins
IPC: H04N13/363 , H04N9/31 , G09G3/00 , H04N13/398 , G02F1/1333 , G09G3/36 , H04N13/337 , 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.
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5.发明授权公开(公告)号：US10264225B2
公开(公告)日：2019-04-16
申请号：US15277981
申请日：2016-09-27
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Helge Seetzen , Lorne A. Whitehead , Gregory John Ward
Abstract: A backlight for a display comprises a plurality of independently controllable light sources and inclined surfaces inclining in a radially outward direction from each light source for shaping the distribution of emitted light. The light sources may each comprise a group of differently-colored light emitters. The backlight may include light integrators configured to mix light of the differently-colored light emitters. Inclined surfaces for shaping the distribution of emitted light may be arranged around exits of the light integrators.
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Patent Agency Ranking
公开(公告)号：US10033940B2
公开(公告)日：2018-07-24
申请号：US13942006
申请日：2013-07-15
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Gregory John Ward , Helge Seetzen , Wolfgang Heidrich
Abstract: A camera has two distinct image sensor arrays. The image sensor arrays are at least one of different types and different resolutions. The image sensor arrays have different dynamic ranges such that one of the image sensor arrays is a high dynamic range image sensor array configured to capture a wider range of light intensity than the other of the image sensor arrays. The camera has an imaging mechanism configured to combine information collected by each of the image sensor arrays to produce a high dynamic range image. The image sensor arrays include one low resolution image sensor array having a high dynamic range, and one high resolution image sensor array having a normal dynamic range smaller than the high dynamic range wherein luminance values within the normal dynamic range represent a subset of luminance values within the high dynamic range.
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公开(公告)号：US10027961B2
公开(公告)日：2018-07-17
申请号：US15715052
申请日：2017-09-25
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Wenhui Jia , Ajit Ninan , Arkady Ten , Gregory John Ward
IPC: H04N19/124 , H04N19/44 , H04N9/77 , H04N5/235 , H04N19/182 , H04N19/136 , H04N19/186
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.
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公开(公告)号：US09934733B2
公开(公告)日：2018-04-03
申请号：US15283575
申请日：2016-10-03
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Lorne A. Whitehead , Helge Seetzen , Gregory John Ward , Wolfgang Heidrich
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.
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公开(公告)号：US09451232B2
公开(公告)日：2016-09-20
申请号：US14237548
申请日：2012-09-27
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Gregory John Ward , Scott Daly
IPC: H04N19/597 , H04N13/00
CPC classification number: H04N13/111 , H04N13/139 , H04N13/161 , H04N19/597
Abstract: Representation and coding of multi-view images using tapestry encoding are described. A tapestry comprises information on a tapestry image and a world coordinates map associated with the tapestry image, each of which may contain information from one or more perspectives of a scene. Perspective images of a scene can be generated from the tapestry image and the world coordinates map.
Abstract translation: 描述使用挂毯编码的多视图图像的表示和编码。 挂毯包括关于挂毯图像和与挂毯图像相关联的世界坐标图的信息，每一个可以包含来自场景的一个或多个视角的信息。 可以从挂毯图像和世界坐标图生成场景的透视图像。
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公开(公告)号：US09420200B2
公开(公告)日：2016-08-16
申请号：US14932543
申请日：2015-11-04
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Ajit Ninan , Scott Daly , Gregory John Ward , Robin Atkins
CPC classification number: H04N5/2355 , H04N5/23232 , H04N5/2353 , H04N5/35536 , H04N13/106 , H04N13/139 , H04N13/239 , H04N13/289 , H04N2013/0088
Abstract: High dynamic range 3D images are generated with relatively narrow dynamic range image sensors. Input frames of different views may be set to different exposure settings. Pixels in the input frames may be normalized to a common range of luminance levels. Disparity between normalized pixels in the input frames may be computed and interpolated. The pixels in the different input frames may be shifted to, or stay in, a common reference frame. The pre-normalized luminance levels of the pixels may be used to create high dynamic range pixels that make up one, two or more output frames of different views. Further, a modulated synopter with electronic mirrors is combined with a stereoscopic camera to capture monoscopic HDR, alternating monoscopic HDR and stereoscopic LDR images, or stereoscopic HDR images.
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