Image comparison to extract odd pixels from one image

Hello,
I am just trying to make one screen capture application which will send captured image to a remote system. I have succeeded in making the basic screen capture application using robot class. The image has to be refreshed at a rate of 1 or 2 frames per second for my application. If I transmit the complete image at this rate, then bandwidth problem will occur. Is there any way where I can compare 2 images, one base image and other newly captured image and takes out only the pixels which has changed and transmit only that pixel to the remote system where I can rebuild the image with transmitted pixels.

shivgaikwad, please read the moderator response to your first post on this forum in this thread:
[http://forums.sun.com/thread.jspa?threadID=355342]
I'm locking your account for 24 hours. When you are able to post abgain,. please post your question in a new thread. Continuing to post to old dead threads may lead to your account being locked for a longer period, or even indefinitely.
Also locking this zombie thread.
db

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Image comparison to extract odd pixels from one image

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