公开(公告)号：US20240251068A1

公开(公告)日：2024-07-25

申请号：US18628376

申请日：2024-04-05

Applicant: 3SHAPE A/S

Inventor： Rune FISKER ,  Henrik ÖJELUND ,  Rasmus KJÆR ,  Mike VAN DER POEL ,  Arish A. QAZI ,  Karl-Josef HOLLENBECK

IPC: H04N13/296 ,  A61B5/00 ,  A61B5/107 ,  G01B11/25

CPC classification number: H04N13/296 ,  A61B5/0068 ,  A61B5/1077 ,  G01B11/2513 ,  G01B11/2518 ,  A61B5/1075 ,  A61B5/1076 ,  A61B5/4547 ,  G01B2210/58

Abstract: A scanner includes a camera, a light source for generating a probe light incorporating a spatial pattern, an optical system for transmitting the probe light towards the object and for transmitting at least a part of the light returned from the object to the camera, a focus element within the optical system for varying a position of a focus plane of the spatial pattern on the object, unit for obtaining at least one image from said array of sensor elements, unit for evaluating a correlation measure at each focus plane position between at least one image pixel and a weight function, a processor for determining the in-focus position(s) of each of a plurality of image pixels for a range of focus plane positions, or each of a plurality of groups of image pixels for a range of focus plane positions, and transforming in-focus data into 3D real world coordinates.

公开(公告)号：US20180255293A1

公开(公告)日：2018-09-06

申请号：US15974105

申请日：2018-05-08

Applicant: 3SHAPE A/S

Inventor： Rune FISKER ,  Henrik ÔJELUND ,  Rasmus KJÆR ,  Mike van der POEL ,  Arish A. QAZI ,  Karl-Josef HOLLENBECK

IPC: H04N13/296 ,  G01B11/25 ,  A61B5/107 ,  A61B5/00

CPC classification number: H04N13/296 ,  A61B5/0068 ,  A61B5/1075 ,  A61B5/1076 ,  A61B5/1077 ,  A61B5/4547 ,  G01B11/2513 ,  G01B11/2518 ,  G01B2210/58

Abstract: A scanner includes a camera, a light source for generating a probe light incorporating a spatial pattern, an optical system for transmitting the probe light towards the object and for transmitting at least a part of the light returned from the object to the camera, a focus element within the optical system for varying a position of a focus plane of the spatial pattern on the object, unit for obtaining at least one image from said array of sensor elements, unit for evaluating a correlation measure at each focus plane position between at least one image pixel and a weight function, a processor for determining the in-focus position(s) of each of a plurality of image pixels for a range of focus plane positions, or each of a plurality of groups of image pixels for a range of focus plane positions, and transforming in-focus data into 3D real world coordinates.