Iterated function systems (IFS's) have received great attention in enc
oding and decoding fractal images, Barnsley has shown that IFS's for i
mage compression can achieve a very high compression ratio for a singl
e image, However, the major drawback of such a technique is the large
computation load required to both encode and decode a fractal image, I
n this paper, we provide a novel algorithm to decode IFS codes, The ma
in features of this algorithm are that it is very suitable for paralle
l implementation and has no transient behavior, Also, from the decodin
g process of this method we can understand the encoding procedure expl
icitly, One example is illustrated to demonstrate the quality of its p
erformance.