1 Case Study of Live View System using Union-Camera Hiroto HARADA* Koji OKAMURA** *Graduate School of Information Science and Electrical Engineering (ISEE), Kyushu University **Computing and Communications Center, Kyushu University August 28, 2003

2 Contents 1.Overview of the demonstration 2.Union-Camera 3.vvideo 4.How to realize the Live View System 5.Consideration 6.Conclusion

3 1.Overview of the demonstaration We had a demonstration with Korea Advanced Institute of Science and Technology We used momomap which integrates fixed-point observation cameras and locational information User just clicks the point on the map to watch the video of the place.

4 Fukuoka Tower Seoul

5 Fukuoka Tower Sea Hawk

6 Fukuoka Tower Seoul locational Information of Sea Hawk

7 Sea Hawk

8 Fukuoka Tower Seoul locational Information of Sea Hawk Video of Sea Hawk

9 Fukuoka Tower Seoul Kyushu University Union-Camera vvideo

10 2.Union-Camera Union-Camera combines the multiple cameras virtually and provides the same operationality as a single camera.

User requests 150 degrees

camera1 camera2 camera degrees corresponds to 30 degrees of camera2

13 UserApplication 150 degrees 30 degrees 150 degrees corresponds to 30 degrees of camera2 Normal Case (without Union-Camera) camera2 0 Application must deal with the correspondence between the degree and camera

14 User Application 150 degrees 30 degrees camera2 The case using Union-Camera degrees Union-Camera operation as a single camera 150 degrees corresponds to 30 degrees of camera2

15 Pan -90 Pan +90 Tilt +25 Tilt -30 We used VC-C3 made by Canon, and set three VC-C3s at Fukuoka Tower in the shape of triangle.

16 2.Union-Camera Camera-Server –has 3 physical video capture device, and each of them is connected to the camera. –captures from the device which is connected to the selected camera. Cameras keep taking video. According to the request, proper camera is selected and changes the direction. Then only the video of the selected camera is sent to User.

17 3.vvideo Vvideo can offer transparent video capture devices on some network environment Using vvideo, all of remote video capture devices can be used in the same way as local video capture devices.

18 Transparent video capture device over Internet Internet physical video capture device virtual video capture device /dev/video0 Control Data Transport Server Daemon Device Driver Client Daemon Control Data Transport application

19 4.How to realize the Live View System

20 Camera-Server vvsd vvcd Web-Server windows media encoder End-User Fukuoka Tower Kyushu University Seoul ① click the point on the web ② momomap changes locational information into pan and tilt of Union-Camera

21 Click here!

22 Click here! -180 degrees of Union-Camera

23 Camera-Server vvsd vvcd Web-Server windows media encoder End-User Fukuoka Tower Kyushu University Seoul ① click the point on the web ② momomap changes locational information into pan and tilt of Union-Camera ③ pan and tilt of Union-Camera ④ pan and tilt of Union-Camera (vvideo) ⑤ Union-Camera changes pan and tilt of Union-Camera into ones of individual camera

24 corresponds to individual camera -180 degrees of Union-Camera camera1 camera2 camera3 -30 degrees of camera2

25 Camera-Server vvsd vvcd Web-Server windows media encoder End-User Fukuoka Tower Kyushu University Seoul ① click the point on the web ② momomap changes locational information into pan and tilt of Union-Camera ③ pan and tilt of Union-Camera ④ pan and tilt of Union-Camera (vvideo) ⑤ Union-Camera changes pan and tilt of Union-Camera into ones of individual camera ⑥ video transport (vvideo) output and capture ⑦ change the format (Motion-JPEG →windows media) windows media player ⑧ video transport

26 5.Consideration The format is different between a camera and End-User (Motion-JPEG and Windows media) –We need a Windows media encoder –If there’s a system that handles the difference automatically, it makes the communication more smoothly and easier for users.

27 6.Conclusion Demonstration for Live View System –User just clicks on the map to watch the video of the place Live View System makes use of –Union-Camera –Vvideo How to realize Live View System