Focus scanning apparatus recording color
Assignee3Shape A/S
InventorsBo Esbech, Christian Romer Rosberg, Mike Van Der Poel, Rasmus Kjær, Michael Vinther, Karl-Josef Hollenbeck
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Abstract
Disclosed are a scanner system and a method for recording surface geometry and surface color of an object where both surface geometry information and surface color information for a block of the image sensor pixels at least partly from one 2D image recorded by the color image sensor. A particular application is within dentistry, particularly for intraoral scanning.
Claims20
A scanner system for recording surface geometry and surface color of an object, wherein the scanner system comprises:
- an intraoral scanner having an elongated tip, wherein the scanner comprises:
- a multichromatic light source configured for providing a probe light for illumination of the object,
- a mirror for redirecting the probe light onto the object,
- a color image sensor comprising an array of image sensor pixels for capturing one or more 2D images of light received from said object,
- a data processing system configured for:
- deriving surface geometry information from the set of captured 2D images and for deriving surface color information from at least one of the 2D images from which the surface geometry information is derived, wherein the derived surface geometry information and surface color information are combined to generate a sub-scan of the object, and
- generating a digital 3D representation expressing both surface color and surface geometry of the object by combining several sub-scans generated for a number of different views of the object.
A method of recording surface geometry and surface color of an object, the method comprising:
- illuminating a surface of the object with probe light from a multichromatic light source using a scanner system;
- capturing sets of 2D images of said object, wherein each set of 2D images comprises a plurality of 2D images;
- deriving surface geometry information from the sets of captured 2D images and deriving surface color information from at least one of the 2D images from which the surface geometry information is derived;
- generating sub-scans of the object based on the surface geometry information, wherein each sub-scan comprises data expressing the surface geometry and surface color of the object;
- and
- combining a number of sub-scans to generate a digital 3D representation, wherein the sub-scans are obtained from different relative positions, wherein the digital 3D representation expresses both the recorded surface geometry and surface color of the object, wherein the surface color and surface geometry are obtained concurrently.
Dependencies are inferred from the claim text.