Image compression algorithms in wireless multimedia sensor networks

(in lingua inglese)

This survey has discussed various compression techniques for WMSN with comparison among them and factors that affect compression performance. Image quality, compression ratio, speed of compression and power consumption are the most important metrics discussed for compression performance. Performance metrics differ according to operating platform. Resource constrained platforms i.e. Wireless multimedia sensor networks have some limitations on memory, power consumption, processor capabilities and life time of sensor nodes. Therefore, SPIHT is the most powerful technique that can be used due to the following reasons: SPIHT achieves very compact output bit stream and low bit rate with high compression ratio than that of its predecessor’s EZW without adding an entropy encoder, which allows its efficiency in terms of computational complexity.