LOCATION CORRECTION OF VIRTUAL OBJECTS

• US 20140176530A1
• Filed: 12/21/2012
• Published: 06/26/2014
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Dassault Systemes Americas Corp. (Dassault Systemes SA)
• Original Assignee: Dassault Systemes Delmia Corporation
• Inventors: Pathre, Uday
• Granted Patent: US 9,058,693 B2
• Time in Patent Office: Days
• US Class Current: 345/419
• CPC Class Codes: G06T 19/20 Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
• CPC Class Codes: G06T 2219/2016 Rotation, translation, scaling

Abstract

A computer-implemented method is provided for use in location correction of virtual objects in a virtual model of a real-world scene. Location of an object consists of both position and orientation of the virtual object. The method includes generating the virtual model, including a virtual object, and acquiring at least one digital image of a real-world object within the real-world scene, wherein the real-world object corresponds to the virtual object. The method also includes calculating an image-based positional difference between at least one predefined point on the virtual object and at least one corresponding point on the real-world object, adjusting the position and/or the orientation of the virtual object based on this image positional difference, and adjusting the virtual model with respect to the corrected location of the virtual object.

Claims

1. A computer-implemented method for use in location correction of a virtual model of a real-world scene, said computer-implemented method comprising:

generating the virtual model, including a virtual object;

acquiring at least one digital image of a real-world object within the real-world scene, wherein the real-world object corresponds to the virtual object;

calculating an image-based positional difference between at least one predefined point on the virtual object and at least one corresponding point on the real-world object;

adjusting at least one of a position and an orientation of the virtual object based on the image positional difference; and

adjusting the virtual model with respect to the corrected location of the virtual object.

2. A computer-implemented method in accordance with claim 1, wherein generating the virtual model comprises calculating a location transform for the virtual object based on a plurality of identifiable points on the virtual object.

3. A computer-implemented method in accordance with claim 2, wherein calculating a location transform comprises receiving a user selection of at least a portion of the plurality of identifiable points.

4. A computer-implemented method in accordance with claim 1, wherein generating the virtual model comprises:

identifying the virtual object and a corresponding reference object; and

identifying the at least one predefined point on the virtual object and a corresponding point on the reference object.

5. A computer-implemented method in accordance with claim 4, further comprising a programmatic adjustment of a virtual view so as to substantially match the predefined points on the reference object with the points on a corresponding real-world reference object.

6. A computer-implemented method in accordance with claim 4, further comprising:

programmatic adjustment of a virtual view; and

calculating the image-based positional difference between the at least one predefined point on the virtual object and the at least one corresponding point on the real-world object for each of the acquired digital image.

7. A computer-implemented method in accordance with claim 6, further comprising minimizing the image positional difference by iterating on the virtual object location transform.

8. A computer for use in location correction of a virtual model of a real-world scene, said computer comprising:

a memory area configured to store the virtual model and a virtual object of the virtual model; and

a processor coupled to said memory area, said processor configured to;

generate the virtual model, including the virtual object;

acquire at least one digital image of a real-world object within the real-world scene, wherein the real-world object corresponds to the virtual object;

calculate an image-based positional difference between at least one predefined point on the virtual object and at least one corresponding point on the real-world object;

adjust at least one of a position and an orientation of the virtual object based on the image positional difference; and

adjust the virtual model with respect to the corrected location of the virtual object.

9. A computer in accordance with claim 8, wherein said processor is further configured to calculate a location transform for the virtual object based on a plurality of identifiable points on the virtual object.

10. A computer in accordance with claim 9, wherein said processor is further configured to receive a user selection of at least a portion of the plurality of identifiable points.

11. A computer in accordance with claim 8, wherein said processor is further configured to:

identify the virtual object and a corresponding reference object; and

identify the at least one predefined point on the virtual object and a corresponding point on the reference object.

12. A computer in accordance with claim 11, wherein said processor is further configured to programmatically adjust of a virtual view so as to substantially match the predefined points on the reference object with the points on a corresponding real-world reference object.

13. A computer in accordance with claim 11, wherein said processor is further configured to:

programmatically adjust a virtual view so as to substantially match the predefined points on the reference object with the points on a corresponding real-world reference object; and

calculate the image-based positional difference between the at least one predefined point on the virtual object and the at least one corresponding point on the real-world object for each of the acquired digital image.

14. A computer in accordance with claim 13, wherein said processor is further configured to minimize the image positional difference by iterating on the virtual object location transform.

15. A computer program product comprising:

one or more non-transitory computer-readable storage media having computer-executable components for use in location correction of a virtual model of a real-world scene, said components comprising;

a generation component that when executed by a processor causes the processor to generate the virtual model, including a virtual object;

an acquisition component that when executed by a processor causes the processor to acquire at least one digital image of a real-world object within the real-world scene, wherein the real-world object corresponds to the virtual object; and

a correction component that when executed by a processor causes the processor to;

calculate an image-based positional difference between at least one predefined point on the virtual object and at least one corresponding point on the real-world object;

adjust at least one of a position and an orientation of the virtual object based on the image positional difference; and

adjust the virtual model with respect to the corrected location of the virtual object.

16. A computer program product in accordance with claim 15, wherein said generation component further causes the processor to:

receive a user selection of at least a portion of a plurality of identifiable points; and

calculate a location transform for the virtual object based on the plurality of identifiable points on the virtual object.

17. A computer program product in accordance with claim 15, wherein said generation component further causes the processor to:

identify the virtual object and a corresponding reference object; and

identify the at least one predefined point on the virtual object and a corresponding point on the reference object.

18. A computer program product in accordance with claim 15, wherein said correction component further causes the processor to programmatically adjust of a virtual view so as to substantially match the predefined points on the reference object with the points on a corresponding real-world reference object.

19. A computer program product in accordance with claim 15, wherein said correction component further causes the processor to:

programmatically adjust a virtual view; and

calculate the image-based positional difference between the at least one predefined point on the reference object and the at least one corresponding point on the real-world reference object for each of the acquired digital image.

20. A computer program product in accordance with claim 19, wherein said correction component further causes the processor to minimize the image positional difference by iterating on the virtual object location transform.