Subband and wavelet decompositions are powerful tools in image coding because of their
decorrelating effects on image pixels, the concentration of energy in a few coefficients, their …

The compression of visual information in the framework of multimedia applications is
discussed. To this end, major approaches to compress still as well as moving pictures are …

Variable-rate tree-structured VQ is applied to the coefficients obtained from an orthogonal
wavelet decomposition. After encoding a vector, we examine the spatially corresponding …

In this paper the compression of visual information at very low data rates is discussed. High
compression coding of still pictures can be split into three categories: waveform, second …

In this paper we present a coding scheme for color images aiming at high compression
ratios. It is based on perceptually classified vector quantization (VQ), where the different …

Publisher Summary This chapter provides an overview of existing approaches that target
very low bit rates. It gives a review of high-compression image-coding techniques and …

Lossy image compression is essential to allow for long term and cost-efficient storage, as
well as the rapid access and transmission of images. Vector quantization is a technique for …

With the evolution of multimedia systems, image and video compression is becoming the
key enabling technology for delivering various image/video services over heterogeneous …