Vq - Enhanced Fractal Image

VQ-enhanced fractal image compression

A novel hybrid scheme combining fractal image compression with mean-removed shape-gain vector quantization is presented. The scheme uses a small set of VQ codebook blocks as a block classi er for the domain blocks and as an alternative means of coding when able to provide a satisfying distortion. Our scheme is shown to improve the performance of conventional fractal coding in all its aspects. T...

Fractal curves to improve the reversible data embedding for VQ-indexes based on locally adaptive coding

1047-3203/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.jvcir.2010.02.008 * Corresponding author. Fax: +886 8 7215034. E-mail addresses: [email protected], b [email protected] (C.-H. Yang). The VQ reversible data embedding technology allows an original VQ coding to be completely restored after the extraction of embedded data. In this paper, we propose a new reversible sche...

Fractal (self-vq) Encoding of Video Sequences

We present results of a scheme to encode video sequences of digital image data based on a quadtree still-image fractal method. The scheme encodes each frame using image pieces, or vectors, from its predecessor; hence it can be thought of as a VQ scheme in which the code book is derived from the previous image. We present results showing: near real-time (5 { 12 frames/sec) software-only decoding...

A fast encoding method without search for fractal image compression

A fast coding algorithm for images using vector quantization (VQ) and pixelwise fractal approximation is proposed. The low frequency component of an input image is approximated and its residual is used to calculate the scaling factor of fractal transform. The scaling factor is compressed by transform VQ (TVQ). In the proposed method, lo encode a digital image by an iterated function system (IFS...

Semantic-Based Image Retrial in the VQ Compressed Domain using Image Annotation Statistical Models