Abstract
Compression reduces redundancy in data representation in order to achieve saving in the cost of storage and transmission. Image compression compensates for the limited on-board resources, in terms of mass memory and downlink and thus it provides a solution to the bandwidth vs. data volume dilemma of modern spacecraft. Thus compression is very important feature in payload image processing units of many satellites. A low complexity and high efficiency near-lossless image compression algorithm is suggested in this paper. The algorithm provides the average compression ratio of 1.403 with high image quality for lossless compression. Compression ratio increases as ∆ parameter increases. Using proposed algorithm compression ratio of 4.208 is achieved for near-lossless compression. The proposed algorithm has low memory cost suitable for hardware implementation.
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