entropy encoding for images

3 次查看（过去 30 天）
FIR
FIR 2012-12-24
is there any source codes available for entropy encoding for images, please help
  2 个评论
Walter Roberson
Walter Roberson 2012-12-24
What difficulty are you having with the code version of it that you wrote?
FIR
FIR 2012-12-25
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

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Image Analyst
Image Analyst 2012-12-24
  8 个评论
显示 6更早的评论
Walter Roberson
Walter Roberson 2012-12-25
what does
length(count)
show? And also
sum(count <= 0)
?
FIR
FIR 2012-12-25
length(count)
ans =
238
>> sum(count <= 0)
ans =
8

请先登录，再进行评论。

Walter Roberson
Walter Roberson 2012-12-25
编辑：Walter Roberson 2012-12-25
http://www.mathworks.com/help/stats/tabulate.html
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 个评论
显示 8更早的评论
FIR
FIR 2012-12-25
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 2012-12-25
Sorry, Google doesn't seem to be accessible to me tonight. Perhaps you could try it from your end?

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Number Theory 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by