Carestream Dental Technology Topco Limited

Other

Carestream Health, Inc.

Qinran Chen

Victor C Wong

Yannick Glinec

Yingqian Wu

Yanbin Lu

Yu Chen Zhou

Shoupu Chen

Zhimin Huo

James R Milch

Zhaohua Liu

Fan Xu

Yufeng Mo

Dawei Sun

Mo Yufeng

A method for forming a subset having a number of member 3D contour images, the method executed at least in part on a computer, selects a first 3D contour image as a member image, obtains a candidate 3D contour image, computes an overlap between the candidate 3D contour image and the first 3D contour image, and adds the candidate 3D contour image to the subset according to the overlap computation.

Real-time key view extraction for continuous 3D reconstruction

A method for intraoral imaging acquires structured light images from a region of interest and forms a range image that characterizes the surface contour of the region of interest according to the acquired structured light images. At least one row of pixels in the range image is processed by selecting a segment of the row, computing residual noise in the selected segment, generating a template for the segment, wherein the template is characteristic of an imaging artifact related to motion, computing a similarity factor according to correlation between frequency-domain transforms of the template and computed residual noise and comparing the computed similarity factor against a threshold to identify an image artifact. The image artifact or excessive motion are reported.

Sawtooth wave surface detection in 3D dental reconstruction system

A method for color texture imaging of teeth with a monochrome sensor array obtains a 3-D mesh representing a surface contour image according to image data from views of the teeth. For each view, recording image data generates sets of at least three monochromatic shading images. Each set of the monochromatic shading images is combined to generate 2-D color shading images, corresponding to one of the views. Each polygonal surface in the mesh is assigned to one of a subset of the views. Polygonal surfaces assigned to the same view are grouped into a texture fragment. Image coordinates for the 3-D mesh surfaces in each texture fragment are determined from projection of vertices onto the view associated with the texture fragment. The 3-D mesh is rendered with texture values in the 2-D color shading images corresponding to each texture fragment to generate a color texture surface contour image.

Apparatus and method of texture mapping for dental 3D scanner

A method for three-dimensional imaging stores a first image of field of view from a handheld optical coherence tomography (OCT) scanning device at a first position where a first OCT scan of an object is captured with the scanning device freely operated by a user. A location metric of a second image of field of view of the scanning device is estimated at a second position relative to the first image while the scanning device is moved from the first to the second position. Instructions on providing user feedback are generated based on the location metric. Feedback is provided to indicate if the second position is adequate for a second OCT scan, wherein providing feedback includes providing user perceivable light of a first color to indicate that the second position is adequate and providing user perceivable light of a second color to indicate that the second position is not adequate.

Method and system for three-dimensional imaging

A method for mapping a sensor pixel array to an illumination pixel array according to a surface forms a group mapping by assigning each pixel in a on the sensor array to a group that has a group width defined by p adjacent pixels on the illumination pixel array by projecting and recording a first and a second multiple group index image with a first and second pattern of lines. Lines appearing in both first and second pattern are spaced by a first distance that is a first multiple of group width p, and lines that appear only in either pattern are evenly spaced by a second distance that exceeds the first distance. A subset of p multiline images are projected, each projecting a line within each group. Lines in one of the multiline images are correlated with lines from the group index images to generate the group mapping.

3-D intraoral measurements using optical multiline method

The present invention relates to method and system for bite registration using multiple bite registrations. In this method or system, when both the 3D teeth model of the upper jaw and the 3D teeth model of the lower jaw are successfully aligned with the bite surface, the bite surface with the 3D teeth models of the upper jaw and the lower jaw is displayed for further evaluation; the bite surfaces selected by the user are combined to generate a final bite registration. Using multiple bite surfaces for registration improves the accuracy.

Method and system for bite registration

A method for three-dimensional imaging is provided, storing a first two-dimensional image of field of view of a scanning device at a first position where a first three-dimensional view of the object is captured with said handheld scanning device; estimating location metric of a second two-dimensional image of field of view of said scanning device at a second position relative to said first image while said scanning device is being moved from said first position to said second position; and generating instructions on providing feedback to the user based on said location metric; wherein said feedback is provided to indicate if said second position is adequate for capturing a second three-dimensional view. A system for three-dimensional imaging is provided as well.

In an exemplary method for obtaining a contour image of a tooth, which can be executed at least in part by a computer, movement of an intra-oral camera can be detected by acquiring a first video image frame that includes the tooth and processing the first video image frame to detect one or more edges of the tooth in the first video image frame and acquiring a second video image frame that includes the tooth and processing the second video image frame to detect the one or more edges of the tooth in the second video image frame. The method can compare corresponding edge locations between the first and second processed video image frames and projects a fringe pattern illumination onto the tooth from the camera, capturing and storing one or more still images of the fringe pattern according to the detected camera movement.

Video-based auto-capture for dental surface imaging apparatus

A method for rib suppression in a chest x-ray image detects and labels one or more ribs in a region of interest and detects rib edges of the one or more detected ribs. Cross rib profiles are generated along the detected ribs. The original x-ray image is conditioned according to at least one of the detected rib edge and cross rib profiles. The conditioned x-ray image can be stored, displayed, or transmitted.

Growing community of inventors

Shanghai, China

Qinran Chen