Web cameras and their applications to the corporate information infrastructure
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Web Cameras And Their Applications to the Corporate Information Infrastructure. Shilpa Jaswal Feb 14, 2001. What is a WebCam?. It is a web page which hosts images or even live video streams served by a digital camera attached to a computer.

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Web cameras and their applications to the corporate information infrastructure

Web Cameras And Their Applications to the Corporate Information Infrastructure

Shilpa Jaswal

Feb 14, 2001


What is a webcam

What is a WebCam?

  • It is a web page which hosts images or even live video streams served by a digital camera attached to a computer.

  • For less than $100 and an Internet dial-up connection, one can set up his own camera on the Internet.

Web


What is needed to setup a webcam

A Digital Camera

A Web Cam Software in a Server

Basic technical knowledge of how Internet works.

Web

What Is Needed to Setup a WebCam?


Methods to setup a webcam

Methods To setup a WebCam:

  • Client Pull

  • Server Push


Methods to setup a webcam client pull

Methods to Setup a WebCam: Client Pull

  • Client pull method uses single snapshots of whatever the WebCam points to.

  • Process:

    • Web Camera takes snap and saves into JPEG File (e.g., CAM.JPG)

    • Simple html page served from WebServer, loads CAM.JPG on client request

    • (e.g. <img src=“CAM.JPG”>

Remote Web Surfer

Corporate LAN

CAMERA

-- PnP/Video/Digital Camera

Computer Connected

to Web Cam

Computer Connected

to Web Cam

ISP hosted Web-Server with

Video-Picture Serving Software


Methods to setup a webcam server push

Methods to Setup a WebCam: Server Push

  • Server push allows the user to view real time video streams coming directly from web cam.

  • Requires Streaming software in Webserver (e.g. special applet or software like RealNetwork)

Remote Web Surfer

Corporate LAN

CAMERA

-- PnP/Video/Digital Camera

Computer Connected

to Web Cam

Computer Connected

to Web Cam

Web-Server with

Video-Picture Streaming Software


Advantages disadvantages of methods

Easy to setup.

Doesn’t take much bandwidth.

Works perfectly for dial-up style internet connections.

Won’t be able to serve video feeds with this method.

Relatively more cumbersome.

Requires high bandwidth connection.

Doesn't work good with Dial-up style internet connection.

Will be able to view real-time video streams.

Only most recent browser versions support this method.

Advantages/Disadvantages of Methods

Client Pull

Server Push


Important considerations

Important Considerations

  • Image Size:

    • Larger image will take more time to load, but resolution can be good.

    • Compromise should be based on bandwidth and clarity

  • Refresh Rate:

    • Higher refresh rate takes more bandwidth, but picture may look more connected

    • Compromise is based on bandwidth and continuity.

  • A reasonably user-accessible image size can be 320x240 for a refresh rate of 20-30 seconds (28k Modem)


Application of webcam

Application of WebCam

  • Video-Conferencing

  • Net-meeting

  • Customer - Sales Product Demo

  • Product Design/Development

  • Virtual Facility Tour

  • Facility Surveillance

  • Monitoring Events/Places

  • Remote Product Training


Conclusions

Conclusions

  • WebCam can be an excellent cost saving tool for a business.

  • The setup can be as cheap as $100 per station or as expensive as $10,000 per station depending on the functionality.

  • One should be careful about the bandwidth requirements when connected to the web.


References

References

  • http://developers.webcamworld.com/index.html

  • http://www.teleport.com/~samc/bike/

  • http://netconference.about.com/internet/netconference/cs/officecamsparti/index.htm

  • http://www.microsoft.com/windows/netmeeting/corp/default.asp

  • http://www.microsoft.com/windows/netmeeting/corp/default.asp


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