Hand held portable three dimensional scanner

• US 8,699,829 B2
• Filed: 01/30/2012
• Issued: 04/15/2014
• Est. Priority Date: 04/21/2004
• Status: Active Grant

• Current Assignee: NextPat Limited
• Original Assignee: NextPat Limited
• Inventors: Knighton, Mark S., DeLaurentis, Peter J., McKinley, William D., Agabra, David S.
• Primary Examiner(s): Dang, Duy M
• Application Number:
  US13/361,693
• Publication Number:
  US 20120127277A1
• Time in Patent Office: 806 Days
• Field of Search: 382/108, 382/154, 382312-313, 358374-474, 345/173, 345/179, 235/462.24, 235/462.43
• US Class Current: 382/313
• CPC Class Codes: G01B 11/24 for measuring contours or curvatures
• CPC Class Codes: H04N 13/204 using stereoscopic image cameras stereoscopic photography G03B35/00
• CPC Class Codes: H04N 13/271 wherein the generated image signals comprise depth maps or disparity maps

Abstract

Embodiments of the invention may include a scanning device to scan three dimensional objects. The scanning device may generate a three dimensional model. The scanning device may also generate a texture map for the three dimensional model. Techniques utilized to generate the model or texture map may include tracking scanner position, generating depth maps of the object and generation composite image of the surface of the object.

Claims

1. An system comprising:

an imaging device capable of concurrently capturing multiple images of a same target at different focal ranges;

a processor to analyze each image to identify which image contains a best focus for a given pixel;

a module inferring a distance to the target at each pixel based, at least in part, on the best focus; and

a modeler to assemble a three-dimensional digital model of at least a portion of the target based on the distances inferred.

2. The system of claim 1 wherein the imaging device comprises multiple image sensing arrays (ISAs) arranged at different focal distances coupled to an optical system that distributes the same target view to each ISA.

4. The system of claim 1 wherein inferring is performed local to the imaging device.

5. The system of claim 2 wherein the modeler is local to the imaging device.

6. The system of claim 1 wherein the module identifies a substantially optimum focus image for a plurality of pixels in different images and wherein the modeler assembles them into a composite image of substantially optimum focus.

7. The system of claim 1 wherein the three dimensional digital model is a depth map of at least a portion of the target.

8. The system of claim 6 wherein the modeler determines a distance to a corresponding point on the target for each of a plurality of pixels by analyzing the optimum focus for each pixel of the plurality and assembling the instances into a composite depth map and assembles the composite image data with the composite depth map to form the three-dimensional model containing both surface image and depth data.

9. The system of claim 6 wherein the modeler correlates the composite image with a second composite image captured from a different vantage point to create the three-dimensional model.

10. The system of claim 6 wherein the modeler aligns a capture of at least one portion of the target with a capture of another portion to form a more complete three dimensional digital model.

11. The system of claim 1 wherein the imaging device comprises:

an image sensing array (ISA),

a lens; and

an actuator to cause relative motion between the lens and the ISA.

12. The system of claim 1 wherein the imaging device comprises:

a plurality of image sensing arrays;

a plurality of lenses associated with the image sensing arrays, each lens of the plurality having a different focal range than at least one other lens of the plurality.

13. The system of claim 1 wherein the imaging device comprises:

an image sensing array capable of concurrently focusing at different depths within its structure.

3. An apparatus comprising an imaging device capable of concurrently capturing multiple images of a same target at discrete focal ranges wherein the imaging device includes an image sensing array containing multiple image planes arranged at different focal distances, each of which can be read out individually.