The Comments:

Ramin Amirnovi (ramirnov@sdcc13.ucsd.edu) writes:

I just bought your new book....I feel it is one of the best
books I have read in a long while.  In addition to being 
interesting it is a challenge to follow, but yet not too 
difficult for a non-math major (like me) to follow.
In fact...I just fininshed the first chapter and I couldn't
wait to sit down and write some independant code in order to
try the basic of the ideas presented.

Thanks for the great book....Ramin Amirnovi

Daniele Sparano (sparano@indigo.iet.unipi.it) writes:

There is an error in equation 8.26 on the top of page 160.
In the denominator the last term should also be raised to
the power of 2.

Franck Davoine (Franck.Davoine@imag.fr) writes:

I saw an error in eqs. of \beta1 and \beta2 on page 
150. In the denominators a minus before 
the squared \sums is missing.

Hailing Guan (hguan@buster.eng.ua.edu) writes:

Dear sir:
  I am a graduate student of Alabama University.I am very interested in Fractal Image Compression.These days I met with some problems when I used the encoding programm provided by your book.
  The problem was when I changed the tolence flag from 1.0 to 10000000000.0, it seemed there was no much chang in encoding time nor copression .The time was around 2-3s, the copression is about 92-93.
  I used the default flag(when tol=8.0) dealing with collie.dat , the encoding time was 22.42, the compression was 10.507616.I assumed if I encoded the file with the command" enc -t 8.0 collie.dat collie.trn", the result would be the same.But actual they were different.
  It realy bothed me , could you please help me out?
  yours 
  hailing.

Zbynek Jurca (jurcaz@risc.upol.cz) writes:

Dear sir!
  I am a student of Palacky University of Olomouc in the Czech Republic.
  I am very interested in fractal compression. I was very pleased when 
  I found some information about this theory. I would put any guestion
  to You. How much this book ( Fractal Image Compression: Theory and 
  Application ) costs? Thank You for any answer.
  I am sorry, my English is not very well.

				Zbynek Jurca
				jurcaz@risc.upol.cz

Tom Simpson (mrwolf@adnetsol.com) writes:

We just completed a video project using fractal video ( I 
belive the codec was a hibreed based on Interated systems 
fractals.) We have worked with many video codec's, but this 
is far and away the best video of CD/ROM yet. ( 30 FPS at
640X480 24 bit color on 486/66 VLB.) The company that did 
the compression was AMCI and I belive the are in Newbaury
park or Thousand oaks Ca. This is great stuff !! Is this 
stuff Real.

Tom Simpson

P.S. Not spell checked, its late.

Dmitry Satanovsky (dima@cs.brandeis.edu) writes:

Dear Dr. Fisher,
Lines 849-50 of enc.c read:
  second_class[1] =
    class_transform[(first_class == 2 ? 1 : 0)][second_class[0]];

  My understanding is that the more intuitive the_first_class and
the_second_class are not used as the arguments of the transformation above
since they would not double the total number of comparisons.
  However, if the_first_class and second_class[0] are the arguments, we
obtain a 'better' second_class[1] with the 3-class search (-F option),
while still doing twice as many comparisons with all searches.  On the few
images that I tried, this modification does give better results with the -F
option and (naturally) identical results with the other combinations.

A.Helvas (hel@asoft.msk.su) writes:

Dear Dr. Fisher:
Thank you for very useful information on IFS commpression. 
Last 4 years I investigate the problem of multydimensional digital fields compression.
Your book is not evailable in Moscow yet. But codes and reports lead me to seek this book actively.
I hope it will be a fundament for my dissertation paper in MPhTI.
Best wishes.
		Truly Yours, 
				Alexander Helvas

Bhasker Dachepalli (bdachepa@buster.eng.ua.edu) writes:

Hello!
I am a graduate student at University of Alabama and planning
on doing my thesis under Fractal Image Compression.  Presently,
I am not fairly aquainted with the subject. I would greatly 
appreciate if anyone could send me some introductory information
on fractal image compression (Discrete Cosine Transform methods)
Thanks in anticipation