Zooming with Implicit Fractals

One advantage of fractal image compression schemes is their multiresolution properties. An image can be decoded at higher or lower resolutions than the original, and it is possible to 'zoom-in' on sections of the image. Even so the problem of fractal zooming has received very little attention. In this paper we examine these multi-resolution properties. We study the problem of fractal zooming in general and in particular with a hybrid fractal transform with implicit fractal terms. When decoding at a resolution higher than the original, artefact can be created which affects the visual quality of the zoomed image. We present one solution to the problem of obtaining clear and sharp edges where the original approximation quality was good. Our enhanced implicit fractal transform method compares favourably with fractal zooming using previous standard fractal approximation algorithms.