公开(公告)号：US11961258B2

公开(公告)日：2024-04-16

申请号：US18156387

申请日：2023-01-19

Applicant: Industrial Technology Research Institute

Inventor： Tien-Yan Ma

IPC: G06T7/80 ,  G02B27/01 ,  G06T7/33 ,  G06T7/37 ,  G06T7/70 ,  G06T19/00 ,  H04N13/327 ,  G02B27/00 ,  H04N13/332

CPC classification number: G06T7/80 ,  G06T7/33 ,  G06T7/70 ,  G02B27/0093 ,  G02B27/0179 ,  G02B2027/0181 ,  G05B2219/37009 ,  G06T7/337 ,  G06T7/37 ,  G06T19/006 ,  G06T2207/20076 ,  G06T2207/30208 ,  G09G2320/0693 ,  H04N13/327 ,  H04N13/332

Abstract: A calibration method for an optical see-through display includes the following. An image sensing device is fixed at a standard position of an eye of a user seeing the optical see-through display, and the image sensing device is configured to photograph a virtual image displayed by the optical see-through display and an image of a real object in an environment. Extrinsic parameters between the image sensing device and a virtual camera are calculated by using extrinsic parameters between the image sensing device and multiple calibration patterns of the real object as well as extrinsic parameters between the virtual camera and the multiple calibration patterns of the real object. A calibration system is also provided.

公开(公告)号：US20230237703A1

公开(公告)日：2023-07-27

申请号：US18156387

申请日：2023-01-19

Applicant: Industrial Technology Research Institute

Inventor： Tien-Yan Ma

IPC: G06T7/80 ,  G06T7/33 ,  G06T7/70

CPC classification number: G06T7/80 ,  G06T7/33 ,  G06T7/70

Abstract: A calibration method for an optical see-through display includes the following. An image sensing device is fixed at a standard position of an eye of a user seeing the optical see-through display, and the image sensing device is configured to photograph a virtual image displayed by the optical see-through display and an image of a real object in an environment. Extrinsic parameters between the image sensing device and a virtual camera are calculated by using extrinsic parameters between the image sensing device and multiple calibration patterns of the real object as well as extrinsic parameters between the virtual camera and the multiple calibration patterns of the real object. A calibration system is also provided.

公开(公告)号：US10977829B2

公开(公告)日：2021-04-13

申请号：US16233262

申请日：2018-12-27

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Tien-Yan Ma ,  Te-Mei Wang ,  Ping-Chang Shih

IPC: G06T7/80 ,  G06T7/55 ,  G06T7/12 ,  G06T7/174

Abstract: A depth camera calibration device and a method thereof are provided. The method comprises: disabling a projection function of a camera and photographing surface planes to obtain a first image; enabling the projection function of the camera and photographing the surface planes to obtain a second image, and a positional relationship between the camera and a calibration plate assembly remaining unchanged when obtaining the first image and the second image; and obtaining parameters of the camera by cropping an image boundary, calculating positions of characteristic points, reading a projection pattern, calculating positions of corresponding points and excluding abnormal points according to the first image and the second image.