title: Image compression via improved quadtree decomposition algorithms.
abstract: Quadtree decomposition is a simple technique used to obtain an image representation at different resolution levels. This representation can be useful for a variety of image processing and image compression algorithms. This paper presents a simple way to get better compression performances (in MSE sense) via quadtree decomposition, by using near to optimal choice of the threshold for quadtree decomposition; and bit allocation procedure based on the equations derived from rate-distortion theory. The rate-distortion performance of the improved algorithm is calculated for some Gaussian field, and it is examined vie simulation over benchmark gray-level images. In both these cases, significant improvement in the compression performances is shown.
authors.affiliation: Dept. of Electr. Eng. Syst., Tel Aviv Univ.
authors.forename: E
authors.initials: E
authors.lastname: Shusterman
authors.forename: M
authors.initials: M
authors.lastname: Feder