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1. WO2010073174 - SYSTEM AND METHOD FOR IMAGE CAPTURING

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

What is claimed is:

1. A system for capturing images, comprising: an illumination means (11), for generating at least two lights having different characteristic; at least two reflective markers (12), each of which being configured to reflect only one of said at least two lights respectively; a camera (13), for capturing lights reflected by said at least two reflective markers (12).

2. A system according to claim 1, wherein said illumination means (11) is configured to generate said at least two lights in sequence with a given frequency; and said camera (13) is configured to capture lights with a capturing frequency corresponding to said given frequency.

3. A system according to claim 1, wherein said illumination means (11) is configured to generate said at least two lights simultaneously; said system further comprises at least two filters (14), each of which being placed in front of the lens of said camera (13) in sequence and allowing only one of said at least two lights to pass through respectively.

4. A system according to any one of claims 1 to 3, wherein said at least two lights have different center wavelength.

5. A system according to claim 4, wherein each of said at least two reflective markers (12) comprises a filter, each of the filters allowing only one of said at least two lights to pass through respectively.

6. A system according to claim 4, wherein the reflective material of each of said at least two reflective markers (12) is configured to reflect only one of said at least two lights.

7. A system according to claim 2, wherein said at least two lights generated in sequence has different intensities.

8. A system according to claim 1, further comprising: a broadband filter placed in front of the lens of said camera (13) for allowing only light reflected by said at least two reflective markers (12) to pass through.

9. A system according to claim 1, wherein said illumination means (11) is configured to generate said at least two lights around the lens of said one or more cameras.

10. A system according to claim 1, wherein said at least two lights is infrared light or ultraviolet light.

11. A system according to claim 1, further comprising: a unit for analyzing images captured by said one or more cameras (13) to determine the positions of said at least two reflective markers (12).

12. A method of capturing images, comprising steps of:

- generating, by an illumination means (11), at least two lights having different characteristic;

- reflecting, by each of at least two reflective markers (12), only one of said at least two lights respectively; - capturing, by a camera (13), lights reflected by said at least two reflective markers

(12).

13. A method according to claim 12, wherein, in said generating step, generating said at least two lights in sequence with a given frequency; and in said capturing step, capturing, by said camera (13), lights with a capturing frequency corresponding to said given frequency.

14. A method according to claim 12, wherein, in said generating step, generating said at least two lights simultaneously; and said capturing step further comprises a step of:

- placing filters (14) in front of the lens of said camera (13) in sequence, wherein each of said filters (14) allowing only one of said at least two lights to pass through respectively.

15. A method according to claim 12, wherein the method further comprises a step of:

- analyzing images captured by said camera (13) to determine the positions of said at least two reflective markers (12).