3D dynamic image production system with automatic viewpoint setting

• US 5,566,280 A
• Filed: 09/20/1994
• Issued: 10/15/1996
• Est. Priority Date: 09/20/1993
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Doi, Miwako, Fukui, Mika
• Primary Examiner(s): Nguyen, Phu K.
• Assistant Examiner(s): Vo, Cliff N.
• Application Number:
  US08/309,446
• Time in Patent Office: 756 Days
• Field of Search: 395/119, 395/120, 395/121, 395/133, 395/134, 348/229, 348/362, 348/364
• US Class Current: 345/419
• CPC Class Codes: A63F 2300/6653 for altering the visibility of an object, e.g. preventing the occlusion of an object, partially hiding an object
• CPC Class Codes: A63F 2300/6661 for changing the position of the virtual camera
• CPC Class Codes: G06T 15/10 Geometric effects

Abstract

A 3D dynamic image production system capable of automatically producing the appropriate viewpoint data for observing the target object. In this system, object data indicating objects and viewpoint data indicating a viewpoint are inputted, and an imaging target object to be imaged is specified. Then, whether a blocking of a viewing axis with respect to the imaging target object by another object is judged, where the viewing axis is determined according to the viewpoint data, and the viewpoint data is changed when it is judged that the viewing axis is blocked. The 3D dynamic image of the imaging target object is then produced according to a new viewing axis determined from the changed viewpoint data.

Claims

1. A 3D dynamic image production system, comprising:

inputting means for inputting object data indicating objects and viewpoint data indicating a viewpoint;

specifying means for specifying an imaging target object to be imaged;

judging means for automatically judging whether a viewing axis with respect to the imaging target object is blocked by another object, the viewing axis being determined according to the viewpoint data;

changing means for automatically changing the viewpoint data when the judging means judges that the viewing axis is blocked; and

producing means for automatically producing a 3D dynamic image of the imaging target object according to a new viewing axis determined from the viewpoint data changed by the changing means.

2. The system of claim 1, wherein the judging means determines the viewing axis by setting up a reference point on the imaging target object and defining the viewing axis along a line joining the reference point and the viewpoint indicated by the viewpoint data.

3. The system of claim 2, wherein the judging means sets up the reference point according to a distance between the imaging target object and the viewpoint indicated by the viewpoint data.

4. The system of claim 1, wherein the changing means changes the viewpoint data by obtaining a plurality of new viewpoint candidates, making the judging means judge whether the viewing axis for each new viewpoint candidate is blocked by any object, and selecting one of the new viewpoint candidates for which the viewing axis is judged to be not blocked by any object.

5. The system of claim 4, wherein said one of the new viewpoint candidates is selected according to a distance of each new viewpoint candidate from the imaging target object.

6. The system of claim 4, wherein said one of the new viewpoint candidates is selected according to a distance of each new viewpoint candidate from an original viewpoint.

7. The system of claim 4, wherein said one of the new viewpoint candidates is selected according to an angle of a viewing axis for each new viewpoint candidate with respect to a surface of the imaging target object.

8. The system of claim 1, wherein the changing means changes the viewpoint data to move the viewpoint closer to the imaging target object so as to avoid said another object.

9. The system of claim 8, wherein the changing means changes the viewpoint data to also change a height of the viewpoint to maintain an angle of the viewing axis with respect to a surface of the imaging target object.

10. The system of claim 1, wherein the changing means changes the viewpoint data to raise a height of the viewpoint so as to avoid said another object.

11. The system of claim 1, wherein the specifying means also specifies one of video camera attributes indicating characteristic video camera operation patterns, and the changing means changes the viewpoint data to realize a characteristic video camera operation pattern indicated by a specified one of the video camera attributes.

12. A method for producing a 3D dynamic image, comprising the steps of:

inputting object data indicating objects and viewpoint data indicating a viewpoint;

specifying an imaging target object to be imaged;

automatically judging whether a viewing axis with respect to the imaging target object is blocked by another object, the viewing axis being determined according to the viewpoint data;

automatically changing the viewpoint data when it is judged that the viewing axis is blocked at the judging step; and

automatically producing a 3D dynamic image of the imaging target object according to a new viewing axis determined from the viewpoint data changed at the changing step.

13. The method of claim 12, wherein the viewing axis is determined by setting up a reference point on the imaging target object and defining the viewing axis along a line joining the reference point and the viewpoint indicated by the viewpoint data.

14. The method of claim 13, wherein the reference point is set up according to a distance between the imaging target object and the viewpoint indicated by the viewpoint data.

15. The method of claim 12, wherein at the changing step, the viewpoint data is changed by obtaining a plurality of new viewpoint candidates, judging whether the viewing axis for each new viewpoint candidate is blocked by any object, and selecting one of the new viewpoint candidates for which the viewing axis is judged to be not blocked by any object.

16. The method of claim 15, wherein said one of the new viewpoint candidates is selected according to a distance of each new viewpoint candidate from the imaging target object.

17. The method of claim 15, wherein said one of the new viewpoint candidates is selected according to a distance of each new viewpoint candidate from an original viewpoint.

18. The method of claim 15, wherein said one of the new viewpoint candidates is selected according to an angle of a viewing axis for each new viewpoint candidate with respect to a surface of the imaging target object.

19. The method of claim 12, wherein at the changing step, the viewpoint data is changed to move the viewpoint closer to the imaging target object so as to avoid said another object.

20. The method of claim 19, wherein at the changing step, the viewpoint data is changed to also change a height of the viewpoint to maintain an angle of the viewing axis with respect to a surface of the imaging target object.

21. The method of claim 12, wherein at the changing step, the viewpoint data is changed to raise a height of the viewpoint so as to avoid said another object.

22. The method of claim 12, wherein the specifying step also specifies one of video camera attributes indicating characteristic video camera operation patterns, and the changing step changes the viewpoint data to realize a characteristic video camera operation pattern indicated by a specified one of the video camera attributes.