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A method for coordinating the distributed transmission of imagery

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3 Author(s)
Dagher, J.C. ; Dept. of Electr., Univ. of Arizona, Tucson, AZ, USA ; Marcellin, M.W. ; Neifeld, M.A.

Distributed imaging using sensor arrays is gaining popularity among various research and development communities. A common bottleneck within such an imaging sensor network is the large resulting data load. In applications for which transmission power and/or bandwidth are constrained, this can drastically decrease the sensor network lifetime. We present an algorithm that efficiently exploits inter- and intrasensor correlation for the purpose of power-constrained distributed transmission of sensor-network imagery. Gains in network lifetime up to 114% are obtained when using the suggested algorithm with lossless compression. Our results also demonstrate that when lossy compression is employed, much larger gains are achieved. For example, when a normalized root-mean-squared error of 0.78% can be tolerated in the received measurements, the network lifetime increases by a factor of 2.8, as compared to the (optimized) lossless case.

Published in:

Image Processing, IEEE Transactions on  (Volume:15 ,  Issue: 7 )

Date of Publication:

July 2006

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