公开(公告)号：US20230298187A1

公开(公告)日：2023-09-21

申请号：US18097477

申请日：2023-01-16

Applicant: QISDA CORPORATION

Inventor： Chuang-Wei Wu ,  Yen-Tsun Lin

IPC: G06T7/32 ,  G06T17/00 ,  G06T7/73 ,  G06T7/33

CPC classification number: G06T7/32 ,  G06T17/00 ,  G06T7/75 ,  G06T7/344 ,  G06T2210/56 ,  G06T2207/10028 ,  G06T2210/41 ,  G06T2207/30036 ,  G06T2207/20221

Abstract: A three dimensional image generation method can include capturing a plurality of images of an object, generating a plurality of point clouds corresponding to a first sequence and a plurality pieces of first pose information according to the plurality of images, generating a second sequence according to a plurality of correlations among the plurality of images, performing a plurality of registration operations on the plurality of point clouds in the second sequence to adjust the plurality pieces of first pose information to generate a plurality pieces of second pose information, and combining the plurality of point clouds according to the plurality pieces of second pose information to generate a three dimensional image of the object.

公开(公告)号：US20230214995A1

公开(公告)日：2023-07-06

申请号：US17693456

申请日：2022-03-14

Applicant: QISDA CORPORATION

Inventor： Chuang-Wei Wu ,  Hung-Chih Chan ,  Lung-Kai Cheng

IPC: G06T7/00 ,  G06T7/40 ,  G06T7/521 ,  G06T7/73 ,  G06V10/56 ,  G06V10/46

CPC classification number: G06T7/0012 ,  G06T7/40 ,  G06T7/521 ,  G06T7/73 ,  G06V10/56 ,  G06V10/46 ,  G06T2207/10024 ,  G06T2207/30036

Abstract: A method for generating a three-dimensional image includes capturing a set of color images of an object, generating a first point cloud according to at least the set of color images, generating a second point cloud by performing a filtering operation to the first point cloud according to the set of color images, selectively performing a pairing operation using the second point cloud and a target point cloud to generate pose information, and combining the first point cloud and the target point cloud according to the pose information to update the target point cloud to generate the three-dimensional image of the object. The set of color images is related to color information of the object. The relativity of the second point cloud and the rigid surface is higher than the relativity of the second point cloud and the non-rigid surface.

公开(公告)号：US20230048005A1

公开(公告)日：2023-02-16

申请号：US17539153

申请日：2021-11-30

Applicant: QISDA CORPORATION

Inventor： Chuang-Wei Wu ,  Hung-Chih Chan ,  Tsung-Hsi Lee

IPC: A61C9/00 ,  G06T19/00 ,  A61C19/05

Abstract: An intraoral scanner includes an image capturing device and a processor. A method of operating the intraoral scanner includes the image capturing device sequentially capturing M images of a buccal bite, the processor generating M sets of buccal bite point clouds according to the M images, the processor matching the M sets of buccal bite point clouds to generate a bite model, when the number of data points of the bite model exceeds a first threshold, the processor computing P sets of bite feature descriptors of the bite model, when a predetermined quantity of bite feature descriptors in a set of bite feature descriptors of the P sets of bite feature descriptors exceeds a second threshold, the processor performing a registration on an upper arch model and a lower arch model to the buccal bite mode to generate a full mouth model.

公开(公告)号：US20190247162A1

公开(公告)日：2019-08-15

申请号：US16250954

申请日：2019-01-17

Applicant: QISDA CORPORATION

Inventor： Chi-Cheng Lin ,  Chuang-Wei Wu ,  Tsung-Hsi Lee

IPC: A61C9/00 ,  A61B5/00 ,  A61B1/00 ,  A61B1/247

Abstract: An intraoral scanner includes an image sensor, a projection module, a motion sensor, a memory unit and a processor. The motion sensor senses three motion variations corresponding to three axes according to a motion state of the intraoral scanner. The memory unit stores three first variation thresholds corresponding to the three axes. The processor determines whether the three motion variations are smaller than or equal to the three first variation thresholds, respectively. When the processor determines that at least one of the three motion variations is smaller than or equal to the three first variation thresholds, the processor enables the image sensor and the projection module. When the processor determines that all of the three motion variations are larger than the three first variation thresholds, the processor disables at least one of the image sensor and the projection module.

公开(公告)号：US20250104321A1

公开(公告)日：2025-03-27

申请号：US18822496

申请日：2024-09-03

Applicant: Qisda Corporation

Inventor： Min-Hsiung Huang ,  Chuang-Wei Wu ,  Tsung-Hsun Wu

IPC: G06T15/00 ,  G06V10/141 ,  G06V10/74

Abstract: A three-dimensional image generation method includes projecting a first light pattern to an object to generate a first image at a first time, capturing the first image, projecting a second light pattern to the object to generate a second image at a second time, capturing the second image, generating a third image corresponding a third time according to the first image and the second image, and generating a three-dimensional image of the object according to the first image, the second image and the third image. The first time precedes the second time, and the second time precedes the third time.

公开(公告)号：US11831857B1

公开(公告)日：2023-11-28

申请号：US17830293

申请日：2022-06-01

Applicant: QISDA CORPORATION

Inventor： Chuang-Wei Wu ,  Yen-Tsun Lin

IPC: G06T7/55 ,  H04N13/254 ,  G06T7/521 ,  G06T7/11 ,  H04N13/128 ,  H04N13/161 ,  H04N13/00

CPC classification number: H04N13/254 ,  G06T7/11 ,  G06T7/521 ,  G06T7/55 ,  H04N13/128 ,  H04N13/161 ,  G06T2207/20021 ,  H04N2013/0081 ,  H04N2013/0092

Abstract: A structured light scanning method includes a light projector projecting a group of structured light to an object, an image capturing device capturing a group of images generated by the object reflecting the group of structured light, an image processor obtaining a pixel luminosity distribution of an image in the group of images, the image processor determining a reflection state of the image from the pixel luminosity distribution, the image processor determining whether to include the image in generating a depth map according to the reflection state, and the image processor decoding at least one image from the group of images to generate the depth map.

公开(公告)号：US11628047B2

公开(公告)日：2023-04-18

申请号：US17191640

申请日：2021-03-03

Applicant: QISDA CORPORATION

Inventor： Chuang-Wei Wu ,  Hung-Chih Chan

IPC: A61C9/00 ,  A61C7/00 ,  A61C13/34

Abstract: A method of operating an intraoral scanner. The intraoral scanner includes an image capturing device and a processor. The method includes the image capturing device sequentially capturing M images along a first dental arch, the processor establishing a first arch model of the first dental arch according to the M images, the image capturing device sequentially capturing N images along a straight-line path from a first anchor to a second anchor on the first dental arch, the processor generating first coordinates of the first anchor and second coordinates of the second anchor according to the N images, and the processor calibrating the first arch model according to the first coordinates and the second coordinates. The first anchor is located at one side of a dental midline of the first dental arch. The second anchor is located at the other side of the dental midline of the first dental arch.

公开(公告)号：US20210290348A1

公开(公告)日：2021-09-23

申请号：US17191640

申请日：2021-03-03

Applicant: QISDA CORPORATION

Inventor： Chuang-Wei Wu ,  Hung-Chih Chan

IPC: A61C9/00 ,  A61C13/34 ,  A61C7/00

Abstract: A method of operating an intraoral scanner. The intraoral scanner includes an image capturing device and a processor. The method includes the image capturing device sequentially capturing M images along a first dental arch, the processor establishing a first arch model of the first dental arch according to the M images, the image capturing device sequentially capturing N images along a straight-line path from a first anchor to a second anchor on the first dental arch, the processor generating first coordinates of the first anchor and second coordinates of the second anchor according to the N images, and the processor calibrating the first arch model according to the first coordinates and the second coordinates. The first anchor is located at one side of a dental midline of the first dental arch. The second anchor is located at the other side of the dental midline of the first dental arch.

公开(公告)号：US20200096327A1

公开(公告)日：2020-03-26

申请号：US16558149

申请日：2019-09-01

Applicant: QISDA CORPORATION

Inventor： Po-Fu Wu ,  Chuang-Wei Wu

IPC: G01B11/25

Abstract: A three-dimensional scanning system includes a projection module, an image capturing module, and a reflector. The projection module includes a light source and a pattern generator. The light source provides a short-wavelength infrared light beam. The pattern generator receives the short-wavelength infrared light beam to project a predetermined pattern. The image capturing module captures the image formed by the predetermined pattern on an object to be scanned. The reflector reflects the short-wavelength infrared light beam to project the predetermined pattern on the object, and reflects the short-wavelength infrared light beam reflected by the object so the image capturing module can capture the image.