公开(公告)号：US11856180B1

公开(公告)日：2023-12-26

申请号：US17810098

申请日：2022-06-30

Applicant: Apple Inc.

Inventor： Boris Morgenstein ,  Assaf Avraham ,  David Pawlowski ,  Gidi Lasovski ,  Refael Della Pergola ,  Tom Levy ,  Yohai Zmora

IPC: H04N13/254 ,  G06T7/521 ,  G01B11/00 ,  G06T5/00 ,  G01B11/25

CPC classification number: H04N13/254 ,  G01B11/2504 ,  G06T5/006 ,  G06T7/521

Abstract: One disclosed embodiment includes techniques for temperature-dependent reference image correction in structured light projectors that may be used for generating three-dimensional (3D) scene depth maps. The techniques disclosed herein include receiving an indication of a temperature (e.g., an actual current operating temperature or a change in the current operating temperature relative to an established reference temperature) associated with one or more components of a projector and then determining, based on the temperature indication, an amount of adjustment needed to correct a reference pattern image based on an estimated effective focal length change of the projector. Next, a reference pattern image may be appropriately adjusted, e.g., based on the determined amount of effective focal length adjustment caused by the current operating temperature of the projector, to generate a corrected reference image, which may then be used to generate a more accurate 3D scene depth maps at the projector's current operating temperature.

公开(公告)号：US20240087149A1

公开(公告)日：2024-03-14

申请号：US17944207

申请日：2022-09-14

Applicant: Apple Inc.

Inventor： Shay Yosub ,  Noam Badt ,  Boris Morgenstein ,  Yuval Vardi ,  David Pawlowski ,  Assaf Avraham ,  Pieter Spinnewyn ,  Tom Levy ,  Yohai Zmora

IPC: G06T7/521 ,  G06T5/50 ,  G06V10/141 ,  G06V10/24 ,  G06V10/74

CPC classification number: G06T7/521 ,  G06T5/50 ,  G06V10/141 ,  G06V10/245 ,  G06V10/761 ,  G06T2207/10028 ,  G06T2207/20221

Abstract: A method for depth mapping includes providing a depth mapping device comprising a projector, which is configured to project a pattern of optical radiation onto a target area over a first field of view about a projection axis, and a camera, which is configured to capture images of the target area within a second field of view, narrower than the first field of view, about a camera axis, which is offset transversely relative to the projection axis. The projector projects the pattern onto first and second planes at first and second distances from the camera, and the camera captures first and second reference images containing first and second parts of the pattern on the first and second planes, respectively. The first and second reference images are combined to produce an extended reference image including both the first and second parts of the pattern.

公开(公告)号：US20240007606A1

公开(公告)日：2024-01-04

申请号：US17810098

申请日：2022-06-30

Applicant: Apple Inc.

Inventor： Boris Morgenstein ,  Assaf Avraham ,  David Pawlowski ,  Gidi Lasovski ,  Refael Della Pergola ,  Tom Levy ,  Yohai Zmora

IPC: H04N13/254 ,  G06T5/00 ,  G06T7/521 ,  G01B11/25

CPC classification number: H04N13/254 ,  G06T5/006 ,  G06T7/521 ,  G01B11/2504

Abstract: One disclosed embodiment includes techniques for temperature-dependent reference image correction in structured light projectors that may be used for generating three-dimensional (3D) scene depth maps. The techniques disclosed herein include receiving an indication of a temperature (e.g., an actual current operating temperature or a change in the current operating temperature relative to an established reference temperature) associated with one or more components of a projector and then determining, based on the temperature indication, an amount of adjustment needed to correct a reference pattern image based on an estimated effective focal length change of the projector. Next, a reference pattern image may be appropriately adjusted, e.g., based on the determined amount of effective focal length adjustment caused by the current operating temperature of the projector, to generate a corrected reference image, which may then be used to generate a more accurate 3D scene depth maps at the projector's current operating temperature.