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    AUTOSTEREO TAPESTRY REPRESENTATION
    31.
    发明申请
    AUTOSTEREO TAPESTRY REPRESENTATION 有权
    自动化TAPESTRY代表

    公开(公告)号：US20150009302A1

    公开(公告)日：2015-01-08

    申请号：US14309965

    申请日：2014-06-20

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Gregory John Ward ,  Timo Kunkel ,  Scott Daly

    IPC: H04N13/04

    CPC classification number: H04N13/111

    Abstract: Representation and coding of multi-view images using tapestry encoding are described. 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.

    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，左移位移图和右移位移图的信息。 可以从挂毯和位移图生成场景的透视图像。 挂毯图像从最左视图图像，最右视图图像，视差图和遮挡图生成。

    Encoding, decoding, and representing high dynamic range images
    33.
    发明授权
    Encoding, decoding, and representing high dynamic range images 有权

    公开(公告)号：US08508617B2

    公开(公告)日：2013-08-13

    申请号：US13675643

    申请日：2012-11-13

    Applicant: Dolby Laboratories Licensing Corporation

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

    IPC: H04N9/73 ,  H04N3/14 ,  H04N5/46 ,  G06K9/40 ,  G06K9/00

    CPC classification number: G06T9/00 ,  H04N9/67 ,  H04N9/77

    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.

    BETA SCALE DYNAMIC DISPLAY MAPPING
    34.
    发明申请
    BETA SCALE DYNAMIC DISPLAY MAPPING 有权

    公开(公告)号：US20250106410A1

    公开(公告)日：2025-03-27

    申请号：US18832349

    申请日：2023-01-30

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Ajit Ninan ,  Gregory John Ward

    IPC: H04N19/186 ,  H04N19/105 ,  H04N19/117 ,  H04N19/34 ,  H04N19/42

    Abstract: An input image to be coded into a video signal and a target image are received. The input image and the target image depict same visual content. One or more beta scaling method indicators and one or more sets of one or more beta scale parameters are generated. The one or more beta scaling method indicators indicate one or more beta scaling methods that use the one or more sets of beta scale parameters to perform beta scaling operations on the input image to generate a reconstructed image to approximate the target image. The input image, along with the one or more beta scaling method indicators and the one or more sets of beta scale parameters. is encoded into the video signal for allowing a recipient device of the video signal to generate the reconstructed image.

    Video encoder and encoding method
    35.
    发明授权
    Video encoder and encoding method 有权

    公开(公告)号：US11876987B2

    公开(公告)日：2024-01-16

    申请号：US17295404

    申请日：2019-11-15

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Gregory John Ward

    IPC: H04N19/85 ,  H04N23/73 ,  H04N19/31 ,  H04N19/182 ,  H04N5/265 ,  H04N19/46 ,  H04N19/176

    CPC classification number: H04N19/31 ,  H04N5/265 ,  H04N19/176 ,  H04N19/182 ,  H04N19/46 ,  H04N19/85 ,  H04N23/73

    Abstract: An image sensor includes a plurality of pixels, each pixel belonging to one of N subframes each characterized by (a) a same exposure-time sequence that includes a short exposure-time alternating with a long exposure-time, and (b) a respective temporal offset equal to a multiple of the short exposure-time. A method for encoding a video stream captured by the image sensor includes (i) for each subframe, linearly combining a long-exposure image, captured at the long exposure-time, and a short-exposure image, captured at the short exposure-time, to yield a residual image, (ii) combining at least some of the long-exposure images from the N subframes to yield a full-frame image having a higher resolution than any long-exposure image, (iii) encoding the full-frame image into a base layer of the video stream, and (iv) encoding at least some of the residual images from the N subframes into an enhancement layer of the video stream.

    Apparatus and method for encoding high frame rate content in standard frame rate video using temporal interlacing
    36.
    发明授权
    Apparatus and method for encoding high frame rate content in standard frame rate video using temporal interlacing 有权

    公开(公告)号：US10991281B2

    公开(公告)日：2021-04-27

    申请号：US16078490

    申请日：2017-02-16

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Gregory John Ward

    IPC: G09G3/00 ,  H04N5/232 ,  H04N5/355 ,  H04N5/235 ,  G06T5/50 ,  G06T5/00

    Abstract: An imaging system, comprising a pixel image sensor array disposed on a substrate and comprising a plurality of pixels, a multi-stage timer coupled to said pixel image sensor array for triggering exposures of said pixels, wherein the pixels are grouped into N subsets, and the timer triggers, for each subset, a sequence of at least two exposures of different capture duration of the pixels of said subset, wherein start times of the exposure sequences of the different subsets are temporally offset, at least one ADC coupled to said pixel image sensor array, which converts said exposures of said pixels to pixel digital values, a memory coupled to said at least one ADC to store said pixel digital values, and a logic circuit coupled to said memory to determine for each pixel of the image sensor array which of the corresponding stored pixel digital values to upload to a video frame.

    Image demosaicing system and method
    37.
    发明授权
    Image demosaicing system and method 有权

    公开(公告)号：US10984505B2

    公开(公告)日：2021-04-20

    申请号：US16956595

    申请日：2019-01-15

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Gregory John Ward

    IPC: G06T3/40 ,  H04N9/04 ,  H04N9/64

    Abstract: A method for demosaicing an image captured by an image sensor includes (a) computing, for each of a first plurality of interpolated pixel-values and based on neighboring primary pixel-values, a respective first confidence value; (b) generating a first thresholded mapping from a first coordinate mapping by removing each interpolated pixel-value having a first confidence value less than a threshold value; (c) repeating steps of computing and generating for a second and third sub-plurality of sensor pixels to yield a second and a third thresholded mapping; (d) determining high-confidence array-coordinates as array-coordinates included in all thresholded mappings, remaining array-coordinates being low-confidence array-coordinates; (e) forming a refined image including, at each high-confidence array-coordinate, a respective pixel-value-triplet including one primary pixel-value and two interpolated pixel-values; and (f) filling the refined image by assigning, for each low-confidence array-coordinate, a pixel-value based on pixel-values of neighboring high-confidence array-coordinates.

    IMAGE DEMOSAICING SYSTEM AND METHOD
    38.
    发明申请
    IMAGE DEMOSAICING SYSTEM AND METHOD 有权

    公开(公告)号：US20210027423A1

    公开(公告)日：2021-01-28

    申请号：US16956595

    申请日：2019-01-15

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Gregory John Ward

    IPC: G06T3/40 ,  H04N9/04 ,  H04N9/64

    Abstract: A method for demosaicing an image captured by an image sensor includes (a) computing, for each of a first plurality of interpolated pixel-values and based on neighboring primary pixel-values, a respective first confidence value; (b) generating a first thresholded mapping from a first coordinate mapping by removing each interpolated pixel-value having a first confidence value less than a threshold value; (c) repeating steps of computing and generating for a second and third sub-plurality of sensor pixels to yield a second and a third thresholded mapping; (d) determining high-confidence array-coordinates as array-coordinates included in all thresholded mappings, remaining array-coordinates being low-confidence array-coordinates; (e) forming a refined image including, at each high-confidence array-coordinate, a respective pixel-value-triplet including one primary pixel-value and two interpolated pixel-values; and (f) filling the refined image by assigning, for each low-confidence array-coordinate, a pixel-value based on pixel-values of neighboring high-confidence array-coordinates.

    Backlight control and display mapping for high dynamic range images
    40.
    发明授权
    Backlight control and display mapping for high dynamic range images 有权

    公开(公告)号：US10242627B2

    公开(公告)日：2019-03-26

    申请号：US15571369

    申请日：2016-05-11

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Suzanne Farrell ,  Scott Daly ,  Robin Atkins ,  Timo Kunkel ,  Gregory John Ward ,  Samir N. Hulyalkar ,  Ning Xu

    IPC: G09G3/34 ,  G06K9/00 ,  G09G3/36

    Abstract: Systems and methods are disclosed for dynamically adjusting the backlight of a display during video playback. Given an input video stream and associated minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the frame min, mid, or max luminance values are filtered using a temporal filter to generate a filtered output value for each frame. The instantaneous dynamic range of a target display is determined based on the filtered output value and the minimum and maximum brightness values of the display. A backlight control level is computed based on the instantaneous dynamic range, and the input signal is tone mapped by a display management process to be displayed on the target display at the selected backlight level. The design of a temporal filter based on an exponential moving average filter and scene-change detection is presented.

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