公开(公告)号：US20230184541A1

公开(公告)日：2023-06-15

申请号：US17744451

申请日：2022-05-13

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Jhe-Ruei LI ,  Wei-Shiang HUANG ,  Tsai-Ling KAO ,  Chun-Yi LEE

IPC: G01B11/25

CPC classification number: G01B11/2504 ,  G01B11/2518

Abstract: A calibration method of three-dimensional measurement system includes a projection device, a camera and a processor. The projection device projects structural light to a reference object including a first calibration surface and a second calibration surface. The camera photographs the reference object to obtain at least one reference object image. The processor performs decoding according to the at least one reference object image to obtain a plurality of pieces of phase data of the at least one reference object image. The processor computes a first phase corresponding to the first calibration surface and a second phase corresponding to the second calibration surface according to the phase data, calculates a surface phase difference between the first phase and the second phase, and computes according to the surface phase difference and a height of the second calibration surface relative to the first calibration surface to obtain a phase-height conversion parameter.

公开(公告)号：US20240153068A1

公开(公告)日：2024-05-09

申请号：US18093917

申请日：2023-01-06

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Wei-Shiang HUANG ,  Tsai-Ling KAO ,  Chun-Yi LEE ,  Jhe-Ruei LI

IPC: G06T7/00

CPC classification number: G06T7/001 ,  G06T2207/30164

Abstract: A non-contact detection method for a nut is provided. The method includes the following steps. The nut is photographed to obtain a threaded hole image of the nut. A thread area comparison between the threaded hole image and a standard threaded hole image is performed. An area difference is obtained according to the result of the thread area comparison. Whether the nut is a good nut is determined according to the area difference.

公开(公告)号：US20220207283A1

公开(公告)日：2022-06-30

申请号：US17244810

申请日：2021-04-29

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Tsai-Ling KAO ,  Kai-Shiang GAN ,  Hian-Kun TENN ,  Wei-Shiang HUANG

IPC: G06K9/46 ,  G06T7/521 ,  G06T5/50 ,  G06K9/62 ,  G06T5/00

Abstract: An image obtaining method comprises: by a projecting device, separately projecting an image acquisition light and a reference light onto a target object, wherein the light intensity of the image acquisition light is higher than the light intensity of the reference light; by an image obtaining device, obtaining a first image and a second image, both the first image and the second image comprising the image of the target object, with the target object of the first image being illuminated by the image acquisition light, and the target object of the second image being illuminated by the reference light, wherein the first image has a first area including a part of the target object, and the second image has a second area including the part of the target object; and by a computing device, performing a difference evaluation procedure to obtain a required light intensity based on a required amount.