Projection apparatus, system and projection method

1. A projection apparatus, comprising a region selection part, an image calibration part and a projection part, wherein

the image calibration part is respectively connected with the region selection part and the projection part;

the region selection part is configured to select at least one projective region and send position information of the projective region to the image calibration part;

the image calibration part is configured to acquire a relative positional relationship between the projective region and the projection part and calibrate an image to be displayed according to the relative positional relationship; and

the projection part is configured to project the calibrated image to be displayed onto the projective region,

wherein the at least one projective region includes a plurality of projective regions; and the calibrating the image to be displayed according to the relative positional relationship includes: segmenting the image to be displayed into a plurality of sub-images to be displayed in each of the plurality of projective regions, so that the projection part respectively projects the plurality of sub-images onto the plurality of projective regions.

2. The projection apparatus according to claim 1 , wherein the projection apparatus includes a storage position, the region selection part is configured to acquire the image to be displayed sent by the image calibration part, screen out the projective region from prestored projective regions stored in the storage position according to a size of the image to be displayed, and feed back a position information of the projective region to the image calibration part.

3. The projection apparatus according to claim 2 , wherein the projection part includes a plurality of sub-projection parts which are respectively disposed on different side surfaces of the projection apparatus.

4. The projection apparatus according to claim 1 , wherein the projection apparatus further comprises an image acquisition part; the image acquisition part is connected with the region selection part and configured to acquire a depth image within a viewfinder coverage and send the depth image to the region selection part; data of pixels in the depth image contain depth information; and

the region selection part is also configured to segment the depth image according to the depth information, screen out the projective region from segmented images, and send the position information of the projective region to the image calibration part,

wherein the image acquisition part includes a TOF camera or a structured light camera; the image acquisition part includes at least one group of infrared emitter and infrared receiver; the infrared emitter emits infrared light towards the viewfinder coverage; and the infrared receiver receives the returning infrared light and obtains the depth image.

5. The projection apparatus according to claim 4 , further comprising a projective region correction part which is connected with the image acquisition part and configured to trigger the image acquisition part according to a correction operation.

6. The projection apparatus according to claim 4 , wherein the projection part includes a plurality of sub-projection parts which are respectively disposed on different side surfaces of the projection apparatus.

7. The projection apparatus according to claim 4 , wherein the projection part includes a plurality of sub-projection parts which are respectively disposed on different side surfaces of the projection apparatus.

8. The projection apparatus according to claim 4 , wherein the projection part includes a plurality of sub-projection parts which are respectively disposed on different side surfaces of the projection apparatus.

9. The projection apparatus according to claim 1 , wherein the image calibration part includes an image processing unit which is configured to correct the image to be displayed according to the relative positional relationship between the projective region and the projection part.

10. The projection apparatus according to claim 1 , wherein the projection part includes a plurality of sub-projection parts which are respectively disposed on different side surfaces of the projection apparatus.

11. The projection apparatus according to claim 1 , wherein the projective region is covered by a projection film layer.

12. The projection apparatus according to claim 1 , wherein the projection part is a laser scanning projection assembly or a projection assembly including a focusing unit.

13. A projection system, comprising the projection apparatus according to claim 1 .

14. A projection method, comprising:

acquiring at least one projective region;

acquiring a relative positional relationship between the projective region and a projection part;

calibrating an image to be displayed according to the relative positional relationship; and

projecting the calibrated image to be displayed onto the projective region,

wherein the at least one projective region includes a plurality of projective regions; and the calibrating the image to be displayed according to the relative positional relationship includes: segmenting the image to be displayed into a plurality of sub-images displayed in each of the plurality of projective regions.

15. The projection method according to claim 14 , wherein the acquiring the relative positional relationship between the projective region and the projection part includes:

acquiring a depth image of the projective region by utilizing the image acquisition part, and acquiring position information of the projective region in a first coordinate system taking the image acquisition part as a reference object, according to the depth image;

calculating a positional relationship between the projection part and the image acquisition part, and obtaining a mapping relationship between the first coordinate system taking the image acquisition part as the reference object and a second coordinate system taking the projection part as a reference object; and

converting the position information of the projective region in the first coordinate system into a position information in the second coordinate system according to the mapping relationship, and obtaining the relative positional relationship between the projection part and the projective region,

wherein the image acquisition part includes a TOF camera or a structured light camera; the image acquisition part includes at least one group of infrared emitter and infrared receiver; the infrared emitter emits infrared light towards the viewfinder coverage; and the infrared receiver receives the returning infrared light and obtains the depth image,

in the depth image, a region of a same depth is one projective region or a region where a depth change is relatively slow and a surrounding change rate does not change sharply is one projective region.

16. A projection apparatus, comprising a region selection part, an image calibration part and a projection part, wherein

the image calibration part is respectively connected with the region selection part and the projection part;

the region selection part is configured to select at least one projective region and send position information of the projective region to the image calibration part;

the image calibration part is configured to acquire a relative positional relationship between the projective region and the projection part and calibrate an image to be displayed according to the relative positional relationship; and

the projection part is configured to project the calibrated image to be displayed onto the projective region,

wherein the projection apparatus includes a storage position, the region selection part is configured to acquire the image to be displayed sent by the image calibration part, screen out the projective region from prestored projective regions stored in the storage position according to a size of the image to be displayed, and feed back a position information of the projective region to the image calibration part.