In recent work, various fractal image coding methods are reported, which adopt the selfsimilarity of images to compress the size of images. However, till now, no solutions for the security of fractal encoded images have been provided. In this paper, a secure fractal image coding scheme is proposed and evaluated, which encrypts some of the fractal parameters during fractal encoding, and thus, pr...

Digital image databases represent huge amount of data, automatic indexing and content base retrieval are crucial factors. IFS ( Iterated function system ) fractal code can be used to retrieve image and the position parameter of IFS code is replaced with the relative distance and direction parameter. A new algorithm of IFS fractal code for image retrieval on compression domain is presented in th...

Image compression methods using fractals has been widely because of its advantages of high compression ratio and the simplicity of decompression, which is particularly suited to the situation of one encoding and many decodings. Fractal theory studies self-similarity in objects. At the beginning of the 1980s, it was used to simulate natural scenes in computer graphics. The self-similarity used i...

Content-based image retrieval attracted many researchers of various fields in an effort to automate data analysis and indexing. In contemporary image databases one finds many images with the same content perturbed by zooming, scaling, rotation and noise. For the purpose of image recognition in such databases we employ features based on statistics stemming from fractal transforms of gray-scale i...

Fractal image compression techniques are developed due to recognition that fractals may describe natural scenes greater than shapes of regular geometry. One of the very efficient fractal methods is based on iterated function system (IFS), and may be developed by Bamsley and Jacquin. New techniques for image compression while using the theory of fractal. The fractal codes are made assuming self ...

Fractal image coding has been used successfully to encode digital grey level images. Especially at very low bitrates fractal coders perform better than cosine-transform-based JPEG coders. A block-based fractal image coder is able to exploit the redundancy of grey level images by describing image blocks through contractively transformed blocks of the same image. Previous fractal coders used affi...

Describing and extracting image’s feature is a key question in content-based image retrieval system, and this paper puts forward a novel image retrieval method using image information entropy and fractal coding. First, compared with a given threshold computed from the inquired image, each image in the database is classified by computing its image entropy. Second, the inquired image’s fractal co...

A multiscale approach to hyperspectral image data analysis using fractal signatures was proposed and implemented in the Interactive Data Language (IDL). For 2-D hyperspectral curves, fractal signature measures the changes in curve length with changing scale. Using NASA’s Earth Observing-1 (EO-1) Hyperion image from a study area near Denton, Texas, USA, the capabilities of fractal signatures in ...

-Fractal image coding has become a popular research area for the past decade, it has been widely used for commercial purpose. The major problem of fractal image coding is the excessive long encoding time. In this paper, we propose an VLSI design for speeding up of fractal image encoding. Simulation results show that the design is quite efficient.