Fractal coding of digital images ooers many promising qualities. However the coding process suuers from the long search time of the domain block pool. In this paper, we obtain mathematical results on the distance measure used in the search. Then we derive an incremental procedure to bound the domain block pixels. We arrange the domain blocks in a tree structure, and utilise the procedure to dir...

In this paper we are going to implement the hybrid wavelet coder to improve the gray image quality at low bit rate, such type of compression provide high compression ratio at low bit rate that means it overcome the drawback of fractal image coding in spatial domain produces the artefact blocking effect this effect can be reduces by using fractal image coder in wavelet domain and also this coder...

Recently, chaos based mapping has widely been applied for image watermarking due to their inherent cryptographic features. Fractals are one of the robust techniques used for image compression. When a Chaotic map is used in conjunction with Fractal-Wavelet, efficiency may be improved in the process of image watermarking. In this paper, Chaos based watermarking method is proposed in cascade with ...

In this paper, we propose to fix the selection of domain blocks when implementing fractal image coding with parallel neural network technologies. The obtained fractal code can be used to get the fine image contour after one iteration from any even gray-level images (except all black), as well as to reconstruct the original image after many times iteration from any images. At the same time, this...

In this paper a new approach for adaptive wavelet image coding is introduced. Based on an adaptive quadtree image-block partition (similar to fractal coding) the diierent image blocks may be compressed independently in an adaptive manner. In order to adapt to local image statistics and features we present several possibilities how to optimize the transform part of a wavelet image block-coder. A...

In this paper, the optical properties of one dimensional fractal structures are investigated. We consider six typical fractal photonic structures: the symmetric dual cantor-like fractal structure, the asymmetric dual cantor-like fractal structure, the single cantor-like fractal structure, the symmetric dual golden-section fractal structure, the asymmetric dual golden-section fractal structure a...

Fractal image coding, the traditional approaches which are being used currently, based on dividing the images into blocks. These blocks are known as range blocks and domain blocks. In these approaches after coding the image generally the decoding process is slow as extensive searching is required .In this paper we are going to present a scheme which uses the concept of chain codes through which...