Method and system for three-dimensional imaging
AssigneeDENTSPLY SIRONA Inc.
InventorsRonny Kucharczyk, Björn Voss
Life of this patent
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Abstract
A method and system for dynamically providing visual feedback about a quality of data collected during intra-oral scanning Images or light patterns are projected onto an object such as teeth for 3D measurement and for relaying feedback about a quality of the 3D measurement to a user. In this way unsuccessful registrations surface areas of the teeth that have not been acquired yet may be corrected by informing the user to repeat scans at corresponding locations in the intra-oral cavity.
Claims13
A method of controlling a system for dynamically providing visual feedback about scan data collected during intra-oral scanning, said visual feedback provided at or near an intra-oral scanning site, the system comprising:
- at least one processor;
- at least one projector and at least one image sensor in communication with the processor, the method comprising:
- providing a plurality of individual optical 3D measurements of a plurality of measurement surfaces of an intra-oral cavity;
- determining if at least one of the plurality of individual optical 3D measurements and/or an accumulated plurality of optical 3D measurements meet predetermined recording criteria;
- and
- projecting said visual feedback onto surfaces of the intraoral cavity corresponding to the individual optical 3D measurements based on the determining
- wherein the predetermined recording criteria is selected from the group consisting of (i) an adequate size of the overlapping area, (ii) an adequate waviness of an object surface in the overlapping area, (iii) an adequate roughness of the object surface in the overlapping area, (iv) an adequate number of characteristic geometries in the overlapping area, and (v) an adequate 3D point density in the overlapping area and/or regions of the intra-oral cavity not contained in an accumulated data set.
Dependencies are inferred from the claim text.