公开(公告)号：US20200184684A1

公开(公告)日：2020-06-11

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 ,  G06T7/174 ,  G06T7/12

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.

公开(公告)号：US20240112360A1

公开(公告)日：2024-04-04

申请号：US18098493

申请日：2023-01-18

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Yu-Wei CHANG ,  Shih-Fang YANG MAO ,  Tien-Yan MA

IPC: G06T7/60 ,  G06T7/73 ,  G06T7/90 ,  G06V10/25 ,  G06V10/56

CPC classification number: G06T7/60 ,  G06T7/73 ,  G06T7/90 ,  G06V10/25 ,  G06V10/56 ,  G06T2207/10024 ,  G06T2207/30108 ,  G06T2207/30204

Abstract: A measurement system includes a camera and a processor. The camera is configured to capture a measurement card image of a measurement card, and the measurement card image includes a number of feature pattern images. The processor is electrically connected to the camera and configured for analyzing the feature pattern images to obtain a feature point coordinate of a feature point of each feature pattern image, and inputting the feature point coordinates into a conversion matrix to obtain a tip coordinate of a tip of the measurement card.