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entropy encoding for images

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FIR
FIR el 24 de Dic. de 2012
is there any source codes available for entropy encoding for images, please help
  2 comentarios
Walter Roberson
Walter Roberson el 24 de Dic. de 2012
What difficulty are you having with the code version of it that you wrote?
FIR
FIR el 25 de Dic. de 2012
I am using 2010a version
code is
[dict,avglen] = huffmandict(symbols,p)
comp = huffmanenco(img,dict);
but taking long time to run and crashes out

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Respuestas (2)

Image Analyst
Image Analyst el 24 de Dic. de 2012
  8 comentarios
Walter Roberson
Walter Roberson el 25 de Dic. de 2012
what does
length(count)
show? And also
sum(count <= 0)
?
FIR
FIR el 25 de Dic. de 2012
length(count)
ans =
238
>> sum(count <= 0)
ans =
8

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Walter Roberson
Walter Roberson el 25 de Dic. de 2012
Editada: Walter Roberson el 25 de Dic. de 2012
If x is a numeric array, TABLE is a numeric matrix. If the elements of x are nonnegative integers, TABLE includes 0 counts for integers between 1 and max(x) that do not appear in x.
But you already read the documentation so you already knew that, so somehow you must have gotten some negative counts. What does
count(counts <= 0)
show, and what does class(count) show?
  10 comentarios
FIR
FIR el 25 de Dic. de 2012
after deleting zeros i get error
Error using ==> arithenco at 36
The symbol sequence parameter can take values only between 1 and the length of the
symbol counts parameter.
Error in ==> sample6 at 79
code=arithenco(seq,count);
Walter Roberson
Walter Roberson el 25 de Dic. de 2012
Sorry, Google doesn't seem to be accessible to me tonight. Perhaps you could try it from your end?

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