1 case study of live view system using union-camera hiroto harada* koji okamura** *graduate school...

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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

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Contents

1. Overview of the demonstration

2. Union-Camera

3. vvideo

4. How to realize the Live View System

5. Consideration

6. Conclusion

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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.

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Fukuoka Tower Seoul

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Fukuoka TowerSea Hawk

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Fukuoka Tower Seoul

locational Informationof Sea Hawk

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Sea Hawk

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Fukuoka Tower Seoul

locational Informationof Sea Hawk

Video of Sea Hawk

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Fukuoka Tower SeoulKyushu University

Union-Camera

vvideo

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2.Union-Camera

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

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0

150

User requests 150 degrees

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0

150

camera1

camera2

camera3

0

30

150 degrees corresponds to 30 degrees of camera2

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User Application

150 degrees 30 degrees


Normal Case (without Union-Camera)

camera2

0

Application must deal with the correspondence between the degree and camera

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User

Application

150 degrees

30 degrees

camera2

The case using Union-Camera

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150 degrees

Union-Camera

operation as a single camera


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Pan -90Pan +90

Tilt +25

Tilt -30

We used VC-C3 made by Canon, and set three VC-C3sat Fukuoka Tower in the shape of triangle.

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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.

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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.

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Transparent video capture device over Internet

Internet

physical videocapture device

virtual videocapture device

/dev/video0

Control

Data Transport

Server Daemon

Device Driver

Client Daemon

Control

Data Transport

application

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4.How to realize the Live View System

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Camera-Server

vvsd vvcd

Web-Server

windows media encoder

End-User

Fukuoka Tower Kyushu University Seoul

①click the point on the web

②momomap changes locational information into pan and tilt of Union-Camera

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Click here!

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Click here!-180 degrees of Union-Camera

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Camera-Server

vvsd vvcd

Web-Server


End-User




③pan and tilt of Union-Camera④pan and tilt

of Union-Camera (vvideo)

⑤Union-Camera changes pan and tilt of Union-Camera into ones of individual camera

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corresponds to individual camera

-180 degrees of Union-Camera

camera1 camera2

camera3

-30 degrees of camera2

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Camera-Server

vvsd vvcd

Web-Server


End-User




③pan and tilt of Union-Camera④pan and tilt

of Union-Camera (vvideo)

⑤Union-Camera changes pan and tilt of Union-Camera into ones of individual camera

⑥video transport (vvideo) output and capture

⑦change the format (Motion-JPEG →windows media)

windows media player

⑧video transport

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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.

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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

1 case study of live view system using union-camera hiroto harada* koji okamura** *graduate school...

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