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公开(公告)号：US10735648B2
公开(公告)日：2020-08-04
申请号：US16299156
申请日：2019-03-12
Applicant: QISDA CORPORATION
Inventor： Chuang-Wei Wu , Min-Hsiung Huang , Chen-Cheng Chiang , Tsung-Hsi Lee
Abstract: An imaging system includes an image sensing unit and a processing unit. The image sensing unit captures a plurality of images of an object, wherein each of the images includes a plurality of pixels. The processing unit obtains a plurality of sets of image data according to the images, wherein each set of image data includes a plurality of characteristic values. The processing unit calculates a plurality of difference parameters of the characteristic values of every two sets of image data. The processing unit accumulates the difference parameters within a predetermined time period to obtain a plurality of accumulated difference parameters corresponding to the pixels. The processing unit determines a plurality of weighting values corresponding to the pixels according to the accumulated difference parameters. The processing unit performs an image processing process according to the sets of image data and the weighting values.
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公开(公告)号：US12048612B2
公开(公告)日：2024-07-30
申请号：US17539153
申请日：2021-11-30
Applicant: QISDA CORPORATION
Inventor： Chuang-Wei Wu , Hung-Chih Chan , Tsung-Hsi Lee
CPC classification number: A61C9/0053 , A61C19/05 , G06T7/0012 , G06T19/00 , G06T19/20 , G06T2207/10028 , G06T2207/30036 , G06T2210/41
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.
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公开(公告)号：US11350032B2
公开(公告)日：2022-05-31
申请号：US16987417
申请日：2020-08-07
Applicant: QISDA CORPORATION
Inventor： Chuang-Wei Wu , Tsung-Hsi Lee
Abstract: A method operating an intraoral scanner including a projection device of the intraoral scanner projecting a predetermined pattern, an image capture device of the intraoral scanner capturing K images of the predetermined pattern projected on an object under test, a controller of the intraoral scanner generating (K−1) overall brightness change indications according to (K−1) sets of two consecutive images of the K images, and if the (K−1) overall brightness change indications are all less than a predetermined threshold, the controller turning off the intraoral scanner. K is a positive integer greater than 1.
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公开(公告)号：US10543065B2
公开(公告)日：2020-01-28
申请号：US16250954
申请日：2019-01-17
Applicant: QISDA CORPORATION
Inventor： Chi-Cheng Lin , Chuang-Wei Wu , Tsung-Hsi Lee
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.
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公开(公告)号：US09785816B1
公开(公告)日：2017-10-10
申请号：US15462914
申请日：2017-03-20
Applicant: Qisda Corporation
Inventor： Chi-Cheng Lin , Min-Hsiung Huang , Chuang-Wei Wu
CPC classification number: G06K7/1447 , G06K7/10722 , G06K7/10792 , G06K7/1413 , G06K7/1439 , G06K19/06028 , G06K19/0614
Abstract: A barcode decoding method includes steps of analyzing a relative relationship between at least two characteristic points of a gray level distribution of a target scanning line of a target barcode to obtain at least one reference characteristic parameter; when determining a current distance between a barcode reader and the target barcode being a relatively long distance, dividing the gray level distribution into at least one bar area and at least one space area; setting a gray level region and locating at least one peak point and/or at least one valley point located within the gray level region from the gray level distribution; when the peak point is located within the bar area, interpolating a space corresponding to the peak point into the bar area; and when the valley point is located within the space area, interpolating a bar corresponding to the valley point into the space area.
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Patent Agency Ranking
公开(公告)号：US20230362345A1
公开(公告)日：2023-11-09
申请号：US17830293
申请日：2022-06-01
Applicant: QISDA CORPORATION
Inventor： Chuang-Wei Wu , Yen-Tsun Lin
IPC: H04N13/254 , G06T7/521 , G06T7/55 , G06T7/11 , H04N13/161 , H04N13/128
CPC classification number: H04N13/254 , G06T7/521 , G06T7/55 , G06T7/11 , H04N13/161 , H04N13/128 , G06T2207/20021 , H04N2013/0081
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.
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公开(公告)号：US20210058561A1
公开(公告)日：2021-02-25
申请号：US16987417
申请日：2020-08-07
Applicant: QISDA CORPORATION
Inventor： Chuang-Wei Wu , Tsung-Hsi Lee
Abstract: A method operating an intraoral scanner including a projection device of the intraoral scanner projecting a predetermined pattern, an image capture device of the intraoral scanner capturing K images of the predetermined pattern projected on an object under test, a controller of the intraoral scanner generating (K−1) overall brightness change indications according to (K−1) sets of two consecutive images of the K images, and if the (K−1) overall brightness change indications are all less than a predetermined threshold, the controller turning off the intraoral scanner. K is a positive integer greater than 1.
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公开(公告)号：US10660731B2
公开(公告)日：2020-05-26
申请号：US16115527
申请日：2018-08-28
Applicant: QISDA CORPORATION
Inventor： Chuang-Wei Wu , Yen-Tsun Lin , Po-Fu Wu
Abstract: An intraoral scanning system includes a motion sensing unit, an image sensing unit, a storage unit and a processing unit. The processing unit classifies first position information and second position information obtained by the motion sensing unit and the image sensing unit in an initial scanning process into first groups and second groups, wherein the first position information and the second position information are stored in the storage unit. The processing unit selectively uses the first groups or the second groups to perform comparison in a re-scanning process, so as to position an incomplete area in a model.
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公开(公告)号：US20200054420A1
公开(公告)日：2020-02-20
申请号：US16115527
申请日：2018-08-28
Applicant: QISDA CORPORATION
Inventor： Chuang-Wei Wu , Yen-Tsun Lin , Po-Fu Wu
Abstract: An intraoral scanning system includes a motion sensing unit, an image sensing unit, a storage unit and a processing unit. The processing unit classifies first position information and second position information obtained by the motion sensing unit and the image sensing unit in an initial scanning process into first groups and second groups, wherein the first position information and the second position information are stored in the storage unit. The processing unit selectively uses the first groups or the second groups to perform comparison in a re-scanning process, so as to position an incomplete area in a model.
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公开(公告)号：US12236589B2
公开(公告)日：2025-02-25
申请号：US17693456
申请日：2022-03-14
Applicant: QISDA CORPORATION
Inventor： Chuang-Wei Wu , Hung-Chih Chan , Lung-Kai Cheng
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.
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