In this paper we introduce a dictionary-based fast lossless text transform algorithm. This algorithm utilizes ternary search tree to expedite transform encoding operation. Based on an efficient dictionary mapping model, this algorithm use a fast hash function to achieve a lightening speed in the transform decoding phrase. Results shows that the average compression time using the transform algor...

Image compression techniques are important and useful in data storage and image transmission through the Internet. These techniques eliminate redundant information in an image which minimizes the physical space requirement of the image. Numerous types of image compression algorithms have been developed but the resulting image is still less than the optimal. The Harmony search algorithm (HSA), a...