[OPTICAL REVIEW Vol. 1, No. 2 (1994) 146-149

An Optical Decoding Architecture for the Random Iteration Algorithm of Iterated Function System Codes

Hsuan T. CHANG and Chung J. KUO

Department of Electrical Engineering, National Chung Cheng University, Chiayi, Taiwan, 62107

(Accepted September 7, 1994)

A novel optical architecture based on the random iteration algorithm to decode iterated function system (IFS) codes is presented. The optical part of this system performs the affine transformations of IFS. The code values in the affine transformations of IFS are first translated into the modulation voltages of the electro-optic modulators (EOMs), with a specific probability. Then, the multiplication and addition operations can easily be performed. With the O/E and A/D converters, the light intensity is converted into an electrical signal to address a specific pixel at the display device. A fractal image is then progressively decoded pixel by pixel and superimposed on the display device. The computer simulation and some experimental results for the proposed architecture are provided for verification. The decoding speed is fast, the image quality is high, and the resolution of the generated fractals depends on the resolution of the display device itself.

Key words : random iteration algorithm, IFS codes, affine transformation, fractals