With the widespread use of shipborne Automatic Identification System (AIS) and establishment shore-based AIS networks in past twenty years, a large amount trajectory data has been generated accumulated systems. However, big size increases cost storing, querying, processing practical applications. includes not only ship spatial position information but also course, speed, heading et al. In other...

This paper has proposed a new thermal wave image sequence compression algorithm by combining double exponential decay fitting model and differential evolution algorithm. This study benchmarked fitting compression results and precision of the proposed method was benchmarked to that of the traditional methods via experiment; it investigated the fitting compression performance under the long time ...

In [1], Beylkin et al. introduced a wavelet-based algorithm that approximates integral or matrix operators of a certain type by highly sparse matrices, as the basis for efficient approximate calculations. The wavelets best suited for achieving the highest possible compression with this algorithm are Daubechies wavelets, while Coiflets lead to a faster decomposition algorithm at slightly lesser ...

Motion Estimation is key role in the world of video compression. Compression is a technique for compacting a video data used for easily transmitting over a network and reducing a size for storage. Motion Estimation is computationally complex while video is compressed. This paper describes three step search algorithm and logarithmic search algorithm used for Motion Estimation in video Compressio...