公开(公告)号：US11248903B2

公开(公告)日：2022-02-15

申请号：US16717425

申请日：2019-12-17

Applicant: Industrial Technology Research Institute

Inventor： Chia-Hung Cho ,  Po-Yi Chang ,  Yi-Sha Ku ,  Kai-Ping Chuang ,  Chih-Hsiang Liu ,  Fu-Cheng Yang

IPC: G01B11/25 ,  G06K9/32 ,  G06T7/521

Abstract: A three-dimension measurement device includes a moving device, a projecting device, a surface-type image-capturing device and a processing device. The moving device carries an object, and moves the object to a plurality of positions. The projecting device generates a first light to the object. The surface-type image-capturing device senses a second light generated by the object in response to the first light to generate a phase image on each of the positions. The processing device is coupled to the surface-type image-capturing device and receives the phase images. The processing device performs a region-of-interest (ROI) operation for the phase images to generate a plurality of ROI images. The processing device performs a multi-step phase-shifting operation for the ROI images to calculate the surface height distribution of the object.

公开(公告)号：US10277790B2

公开(公告)日：2019-04-30

申请号：US14978482

申请日：2015-12-22

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Hau-Wei Wang ,  Chun-Hsien Chen ,  Chung-Ning Huang ,  Po-Yi Chang

IPC: H04N5/225 ,  G06T7/00 ,  G06T7/521 ,  G01C3/32 ,  G02B7/28

Abstract: A full-range image detecting system including a planar light source, an image capturing device, a light sensing device, a processing unit and a measuring module is provided. The planar light source projects a photo image with periodical variations onto an object. The image capturing device captures a reflective photo image reflected from the object. The light sensing device detects the coordinates of at least three measuring points on the object for fitting a plane. The processing unit calculates a phase variation of the reflective photo image after phase shift, a relative altitude of the surface profile of the object according to the phase variation, and an absolute altitude of the surface profile of the object with respect to the plane to obtain an information of absolute coordinate. The measuring module detects the surface of the object according to the information of absolute coordinate of the object.

公开(公告)号：US10002439B2

公开(公告)日：2018-06-19

申请号：US15394048

申请日：2016-12-29

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Chia-Hung Cho ,  Po-Yi Chang

IPC: G06K9/00 ,  G06T7/521

CPC classification number: G06T7/521

Abstract: A three-dimensional measurement system includes a projector, an image sensor, an image analyzing module and a measurement module. The projector provides a structured light pattern. The image sensor captures an object image of an object on which the structured light pattern is projected. The image analyzing module analyzes the object image to obtain a space coding image and a phase coding image according to gray level distribution of the object image. The measurement module calculates phase information of each of coordinate points in the phase coding image, calculates compensation information of a coordinate position, corresponding to a coordinate position of a point of discontinuity, in the space coding image, compensates the phase information of the point of discontinuity in the phase coding image by the compensation information, and calculates height information of the object according to the phase information of each of the coordinate points.