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A proposition of mobile fractal image decompression

Nikiel S.

International Journal of Applied Mathematics and Computer Science

2007

Vol. 17, no 1

129-136

Multimedia are becoming one of the most important elements of the user interface with regard to the acceptance of modern mobile devices. The multimodal content that is delivered and available for a wide range of mobile telephony terminals is indispensable to bind users to a system and its services. Currently available mobile devices are equipped with multimedia capabilities and decent processing power and storage area. The most crucial factors are then the bandwidth and costs of media transfer. This is particularly visible in mobile gaming, where textures represent the bulk of binary data to be acquired from the content provider. Image textures have traditionally added visual realism to computer graphics. The realism increases with the resolution of textures. This represents a challenge to the limited bandwidth of mobile-oriented systems. The challenge is even more obvious in mobile gaming, where single image depicts a collection of shots or animation cycles for sprites and a backdrop scenery. In order to increase the efficiency of image and image texture transfer, a fractal based compression scheme is proposed. The main idea is to use an asymmetric server-client architecture. The resource demanding compression process is performed on the server side while the client part decompresses highly packed image data. The method offers a very high compression ratio for pictures representing image textures for natural scenes. It aims to minimize the transmission bandwidth that should speed up the downloading process and minimize the cost and time of data transfer. The paper focuses on the implementation of fractal decompression schemes suitable for most mobile devices, and opens a discussion on fractal image models for limited resource applications.

Koncepcja fraktalnej kompresji obrazu

Siwocha A., Krupski M., Cader A.

Automatyka / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

2006

T. 10, z. 3

155-166

Zaawansowane metody kompresji obrazu traktują naturalne obrazy jako obiekty multifraktalne. W publikacji zaproponowano odmienną koncepcję kompresji fraktalnej obrazów, wykorzystującą nową metodę interpolacji fraktalnej. Opiera się ona na koncepcji fraktalnych splajnów bazowych (FB-splines) i jest modyfikacją klasycznej metody splajnów bazowych.

The advanced methods of picture compression treat the natural pictures as multifractal objects. In this paper there is proposed a distinct conception of fractal picture compression, which uses a new method of fractal interpolation. This method is based on a conception of fractal base splines and it is a modification of conventional method of base splines.