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    SYSTEM FOR USING DIGITAL LIGHT PROJECTORS FOR AUGMENTED REALITY
    5.
    发明申请
    SYSTEM FOR USING DIGITAL LIGHT PROJECTORS FOR AUGMENTED REALITY 有权

    公开(公告)号：US20240369829A1

    公开(公告)日：2024-11-07

    申请号：US18775292

    申请日：2024-07-17

    Applicant: Snap Inc.

    Inventor： Jeffrey Michael DeWall ,  Dominik Schnitzer ,  Amit Singh ,  Daniel Wagner

    IPC: G02B27/00 ,  G02B27/01

    Abstract: A method for configuring a digital light projector (DLP) of an augmented reality (AR) display device is described. A light source component of the DLP projector is configured to generate a single red-green-blue color sequence repetition per image frame. The AR display device identifies a color sequence of the light source component of the DLP projector and tracks a motion of the AR display device. The AR display device adjusts an operation of the DLP projector based on the single red-green-blue color sequence repetition, the color sequence of the light source component of the DLP projector, and the motion of the AR display device.

    LATE WARPING TO MINIMIZE LATENCY OF MOVING OBJECTS
    6.
    发明公开
    LATE WARPING TO MINIMIZE LATENCY OF MOVING OBJECTS 审中-公开

    公开(公告)号：US20240362743A1

    公开(公告)日：2024-10-31

    申请号：US18768841

    申请日：2024-07-10

    Applicant: Snap Inc.

    Inventor： Bernhard Jung ,  Daniel Wagner

    IPC: G06T3/18 ,  G06T13/40 ,  G06T13/80 ,  G06T15/20

    CPC classification number: G06T3/18 ,  G06T13/40 ,  G06T13/80 ,  G06T15/205 ,  G06T2210/44

    Abstract: A method for minimizing latency of moving objects in an augmented reality (AR) display device is described. In one aspect, the method includes determining an initial pose of a visual tracking device, identifying an initial location of an object in an image that is generated by an optical sensor of the visual tracking device, the image corresponding to the initial pose of the visual tracking device. rendering virtual content based on the initial pose and the initial location of the object, retrieving an updated pose of the visual tracking device, tracking an updated location of the object in an updated image that corresponds to the updated pose, and applying a time warp transformation to the rendered virtual content based on the updated pose and the updated location of the object to generate transformed virtual content.

    VISUAL-INERTIAL TRACKING USING ROLLING SHUTTER CAMERAS
    7.
    发明公开
    VISUAL-INERTIAL TRACKING USING ROLLING SHUTTER CAMERAS 审中-公开

    公开(公告)号：US20240314461A1

    公开(公告)日：2024-09-19

    申请号：US18677296

    申请日：2024-05-29

    Applicant: Snap Inc.

    Inventor： Matthias Kalkgruber ,  Erick Mendez Mendez ,  Daniel Wagner ,  Daniel Wolf ,  Kai Zhou

    IPC: H04N25/531 ,  G02B27/01 ,  H04N23/51

    CPC classification number: H04N25/531 ,  G02B27/0172 ,  H04N23/51 ,  G02B2027/0138 ,  G02B2027/014 ,  G02B2027/0178

    Abstract: Visual-inertial tracking of an eyewear device using a rolling shutter camera(s). The device includes a position determining system. Visual-inertial tracking is implemented by sensing motion of the device. An initial pose is obtained for a rolling shutter camera and an image of an environment is captured. The image includes feature points captured at a particular capture time. A number of poses for the rolling shutter camera is computed based on the initial pose and sensed movement of the device. The number of computed poses is responsive to the sensed movement of the mobile device. A computed pose is selected for each feature point in the image by matching the particular capture time for the feature point to the particular computed time for the computed pose. The position of the mobile device is determined within the environment using the feature points and the selected computed poses for the feature points.

    Low latency hand-tracking in augmented reality systems
    8.
    发明授权
    Low latency hand-tracking in augmented reality systems 有权

    公开(公告)号：US12002168B2

    公开(公告)日：2024-06-04

    申请号：US17844541

    申请日：2022-06-20

    Applicant: Snap Inc.

    Inventor： Jan Bajana ,  Bernhard Jung ,  Daniel Wagner

    IPC: G06T19/00 ,  G06T7/20 ,  G06T15/00

    CPC classification number: G06T19/006 ,  G06T7/20 ,  G06T15/005 ,  G06T2200/28 ,  G06T2207/30196

    Abstract: A method for reducing motion-to-photon latency for hand tracking is described. In one aspect, a method includes accessing a first frame from a camera of an Augmented Reality (AR) device, tracking a first image of a hand in the first frame, rendering virtual content based on the tracking of the first image of the hand in the first frame, accessing a second frame from the camera before the rendering of the virtual content is completed, the second frame immediately following the first frame, tracking, using the computer vision engine of the AR device, a second image of the hand in the second frame, generating an annotation based on tracking the second image of the hand in the second frame, forming an annotated virtual content based on the annotation and the virtual content, and displaying the annotated virtual content in a display of the AR device.

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