D. M. Monro, S. J. Woolley. Rate/distortion in fractal compression: order of transform and block symmetries. In Proc. ISSIPNN'94 Intern. Symp. on Speech, Image Processing and Neural Networks, Pages 168-171, Hong Kong, 1994.
We have evaluated two complexity options in fractal image coding, namely the order of fractal approximation and the benefits of searching over block symmetries. This was done in terms of the fractal coefficients. Our results question the current wisdom in this field. Most fractal block coding systems use a low order approximation, while our results suggest that where the distortion and compression are similar, a higher order approximation gives a noticeably sharper image. Virtually all reported fractal coding algorithms search for the best block reflections and rotations, but we demonstrate here that extra bits required to code the symmetry options are not compensated for by the modest fidelity gained.
@InProceedings{MoWo94b,
Author = {Monro, D. M. and Woolley, S. J.},
Title = {Rate/distortion in fractal compression: order of transform and block symmetries},
BookTitle = {Proc. ISSIPNN'94 Intern. Symp. on Speech, Image Processing and Neural Networks},
Pages = {168--171},
Address = {Hong Kong},
Year = {1994}
}