Projection system

1. A projection system comprising:

a projector configured to projects a light onto an object, the light including a first light including invisible light and a second light including visible light;

a camera including a wavelength selector configured to transmit the first light, and absorb or reflect the second light, and configured to capture the first light; and

an image generator configured to generate an image data indicating a projection image data based on a captured data captured by the camera in connection with the first light being reflected by the object,

wherein the projector is configured to emit pulsed light of the first light with pulse width being smaller than one frame period of the projected image formed by the second light, and an amount of the pulsed light emitted for a duration of the pulse width being larger than an amount of the second light emitted for the same duration, and

the image generator is configured to generate the image data based on an image captured in accordance with a timing of the pulsed light emission.

2. The projection system of claim 1 ,

wherein the camera captures the image in synchronization with the pulsed light emission.

3. The projection system of claim 2 ,

wherein the camera captures the image every time of the pulsed light emission with a predetermined delay period from a timing of the pulsed light emission.

4. The projection system of claim 3 ,

wherein the delay period is on the basis of a distance to the object and the velocity of light.

5. The projection system of claim 1 ,

wherein the camera repeatedly captures images by a time interval shorter than a repetition interval between emissions of the pulsed light of the second light, and

the image generator extracts the image captured in accordance with the timing of the pulsed light emission from the images repeatedly captured.

6. The projection system of claim 1 ,

wherein an exposure period for the camera to capture the image is shorter than or equal to half of a pulse cycle for the pulsed light emission.

7. The projection system of claim 1 ,

where in the projector includes a first projector and a second projector, the first projector comprising a pulsed light source including a pulsed laser device.

8. The projection system of claim 1 ,

wherein the first light is infrared light.

9. The projection system of claim 1 ,

wherein an image formed by the first light, projected onto the object is pattern in accordance with a space encoding method.

10. The projection system of claim 1 ,

wherein the measured position is a position in three-dimensional space.

11. The projection system of claim 1 ,

wherein an optical axis of the projector and the camera are parallel with each other.

12. The projection system of claim 1 ,

wherein the measured position is obtained based on a distance from the projector to the object.

13. A projection method comprising:

projecting a first light including invisible light and a second light including visible light onto an object;

capturing by a camera including a wavelength selector configured to transmit the first light, and absorb or reflect the second light, the first light projected;

measuring a position or a shape of the object based on a result of the capturing;

generating image data indicating a projection image depending on a result of the measuring; and

projecting the projection image indicated by the image data by using a second light including visible light,

wherein the projecting of the light of the first length comprises emitting pulsed light of the first light with a pulsed width being smaller than one frame period of the projected image formed by the second light, and an amount of the pulsed light emitted for a duration of the pulse width being larger than an amount of the light of the second light emitted for the same duration, and

the image data is generated based on an image captured in accordance with a timing of the pulsed light emission.

14. The projection method of claim 13 ,

wherein the camera captures the image in synchronization with the pulsed light emission.

15. The projection method of claim 14 ,

wherein the camera captures the image every time of the pulsed light emission with a predetermined delay period from a timing of the pulsed light emission.

16. The projection method of claim 15 ,

wherein the delay period is on the basis of a distance to the object and the velocity of light.

17. The projection method of claim 13 ,

wherein the camera repeatedly captures images by a time interval shorter than a repetition interval between emissions of the pulsed light of the second wavelength, and

the image generator extracts the image captured in accordance with the timing of the pulsed light emission from the images repeatedly captured.

18. The projection method of claim 13 ,

wherein an exposure period for the camera to capture the image is shorter than or equal to half of a pulse cycle for the pulsed light emission.

19. The projection method of claim 13 ,

wherein the projector includes a first projector and a second projector, the first projector comprising a pulsed light source including a pulsed laser device.

20. The projection method of claim 13 ,

wherein the first light is infrared light.

21. The projection method of claim 13 ,

wherein an image formed by the light of the first wavelength, projected onto the object is a measurement pattern in accordance with a space encoding method.

22. The projection method of claim 13 ,

wherein the measured position is a position in three-dimensional space.

23. The projection method of claim 13 ,

wherein an optical axis of the projector and the camera are parallel with each other.

24. The projection method of claim 13 ,

wherein the measured position is obtained based on a distance from the projector to the first object.