Compression of Image Using DCT, VLC and Huffman Coding
Anu Chabra, Parveen Toor, M. Tech Scholar · 2014
Abstract — in wireless sensor network, there is camera on a node that capture image and transmit to base station. The cameras are static and periodically capture an image that is transmitted back to the base station. The base station then inserts the images in a database that can be accessed over the Internet. There are limited resources for camera nodes like processing power, bandwidth and energy. Since the nodes are battery powered and are supposed to run for a long time without the need for service from a user the energy consumption is a very important issue. By shutdown the hardware of camera then power can be save as possible between images are taken. To reduce the time needed to transmit an image can be done by using an efficient algorithm for compression. These compression algorithms are DCT, VLC and Huffman coding by which an image can be compressed.