Imaging system, method, and accessory therefor

• US 20080212840A1
• Filed: 09/10/2007
• Published: 09/04/2008
• Est. Priority Date: 09/12/2006
• Status: Abandoned Application

• Current Assignee: CogniTens Ltd. (Hexagon AB)
• Original Assignee: CogniTens Ltd. (Hexagon AB)
• Inventors: Galatzer, Yishai, Shalom, Tamir, Albeck, Dan, Brincat, Gary
• Application Number:
  US11/898,195
• Publication Number:
  US 20080212840A1
• Time in Patent Office: Days
• US Class Current: 382/108
• CPC Class Codes: G01B 11/24 for measuring contours or curvatures

Abstract

Systems and methods are provided for imaging and reconstructing topographical features of an object, in which an illumination system illuminates the object and images may be acquired by an image acquisition system, and wherein at least two components including the object, the illumination system, and the image acquisition system are mounted to or otherwise associated with independently controllable motion inducing mechanisms, in particular robotic arms, such as to enable at least two of the components to be independently moved, to provide optimum illumination and viewing conditions wherein to obtain image data. The image data is configured to enable topographical features of the object to be reconstructed.

Claims

1. A system for virtual reconstruction of topographical features of an object, comprising:

an image acquisition system for obtaining image data of at least one region of interest (ROI) of the object comprising said topographical features, said data being configured for enabling virtual reconstruction of said topographical features of said object;

an illumination system for illuminating at least said ROI;

wherein at least two of;

said image acquisition system, said illumination system and said object,

are independently controllably movable in a manner such as to provide a desired illumination to said ROI and to enable the ROI thus illuminated to be imaged in a desired manner; and

data processor for virtually reconstructing said topographical features based on said image data.

2. A system according to claim 1, comprising at least two suitable motion inducing mechanisms, each said motion inducing mechanism being adapted for independently controllably providing at least one of a displacement motion and a rotational motion for a different one of said at least two of said image acquisition system, said illumination system and said object.

3. A system according to claim 2, wherein each said motion inducing mechanism comprises a robotic arm comprising a corresponding one of said image acquisition system, said illumination system and said object mounted thereto, and further comprising a suitable controller for controlling the position and orientation of each said robotic arm.

4. A system according to claim 3, wherein said controller is further adapted for controlling operation of at least one of the or each one image capturing device and the or each one image illumination unit.

5. A system according to claim 3, wherein each said robotic arm provides movement in at least two translational degrees of freedom and/or provides movement in at least two rotational degrees of freedom.

6. A system according to claim 3, wherein each said robotic arm comprises an operative end thereof configured to move to any point in space within a predetermined geometrical envelope in any suitable manner so as to avoid collision with another component of the system.

7. A system according to claim 1, wherein said imaging system provides suitable image data on which epipolar, triangulation or any other suitable image-based reconstruction technique may be applied to determine corresponding at least one of surface topography and dimensional data of the object.

8. A system according to claim 1, wherein said illumination system comprises

a background medium, wherein the medium comprises a reflectance substantially greater than a reflectance of said ROI of the object at least in a vicinity of an edge comprised in said ROI when viewed along at least along an optical axis of said image acquisition system;

the said image acquisition system comprising at least one image capturing device being disposed with respect to said medium such that said ROI including said edge are positioned intermediate between said at least one image capturing device and said medium; and

at least one illumination source for front illuminating at least a portion of said ROI including said edge and at least a portion of said medium proximate to said edge.

9. A system according to claim 8, wherein said medium comprises a retro-reflective layer.

10. A system according to claim 8, wherein:

said background medium is mounted on a controllable suitable motion inducing mechanism adapted for providing movement thereto in a desired number of degrees of freedom; and

said at least one illumination source is mounted on a different controllable suitable motion inducing mechanisms adapted for providing movement thereto in a desired number of degrees of freedom.

11. A system according to claim 8, wherein said background medium and said at least one illumination source are mounted on a common controllable suitable motion inducing mechanism adapted for providing movement thereto in a desired number of degrees of freedom.

12. A system according to claim 8, wherein:

said background medium is mounted on a controllable suitable motion inducing mechanism adapted for providing movement thereto in a desired number of degrees of freedom; and

said at least one illumination source is mounted on said at least one image capturing device.

13. A system according to claim 8, wherein:

said background medium is statically mounted;

said object is mounted on a first controllable suitable motion inducing mechanism adapted for providing movement thereto in a desired number of degrees of freedom;

said at least one image capturing device is mounted on a second controllable suitable motion inducing mechanisms adapted for providing movement thereto in a desired number of degrees of freedom; and

said at least one illumination source is mounted on said at least one image capturing device.

14. A system according to claim 8, wherein:

said background medium and said at least one illumination source are statically mounted with respect to said device and to said image acquisition system.

15. A system according to claim 8, wherein said background medium comprises visually exposed surface and a plurality of alternative media comprised on actuable elements, wherein said elements may be actuated synchronously to selectively provide one or another of said alternative media on said surface.

16. A system for imaging an object, comprising:

an image acquisition system for obtaining images of at least one region of interest (ROI) of the object;

an illumination system for illuminating at least said ROI;

wherein at least two of;

said image acquisition system, said illumination system and said object

are independently controllably movable in a manner such as to provide a desired illumination to said ROI and to enable the ROI thus illuminated to be imaged in a desired manner.

17. A system according to claim 16, wherein said imaging system is adapted for providing image data configured for enabling virtual reconstruction of topographical features of said object.

18. A system for imaging at least a region of interest (ROI) of an object including an edge, comprising:

a background system having a visually exposed surface,

an image acquisition system comprising at least one image capturing device being disposed with respect to said surface such that said ROI including said edge are positioned intermediate between said at least one image capturing device and said surface;

an illumination system comprising at least one illumination source for front illuminating at least a portion of said ROI including said edge and at least a portion of said visually exposed surface proximate to said edge;

wherein said background system comprises a visually exposed surface selectively constituting one of a plurality of interchangeable background surfaces, wherein each said background surface comprises a plurality of surface elements each of which may be reversibly moved between a first position wherein the surface element is not comprised on said visually exposed surface, and a second position wherein the surface element is comprised on said visually exposed surface.

19. A background system for an illuminated object to be imaged with respect thereto, comprising a visually exposed surface selectively constituting one of a plurality of interchangeable background surfaces, wherein each said background surface comprises a plurality of surface elements each of which may be reversibly moved between a first position wherein the surface element is not comprised on said visually exposed surface, and a second position wherein the surface element is comprised on said visually exposed surface.

20. A method for imaging an object, comprising:

(a) providing an image acquisition configured for obtaining images of at least one region of interest (ROI) of the object;

(b) providing an illumination system configured for illuminating at least said ROI;

(c) controllably moving at least two of said image acquisition system, said illumination system and said object in a manner such as to provide a desired illumination to said ROI and to enable the ROI thus illuminated to be imaged from a desired direction with respect thereto;

(d) providing said desired illumination and imaging said ROI thus illuminated to provide image data.

21. A method according to claim 20, wherein step (c) comprises providing movement in at least two translational degrees of freedom.

22. A method according to claim 20, wherein step (c) comprises providing movement in at least two rotational degrees of freedom.

23. A method according to claim 20, further comprising the step of virtually reconstructing topographical features of said ROI based on said image data.

24. A method for virtual reconstruction of topographical features of an object, comprising imaging the object according to the method of claim 20 and further comprising the step of virtually reconstructing topographical features of said ROI based on said image data.