MATLAB Huffman Coding. Can someone offer me help with the sorting and calculating of the probabilities?

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Martin Park 2013-10-3

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https://ww2.mathworks.cn/matlabcentral/answers/89112-matlab-huffman-coding-can-someone-offer-me-help-with-the-sorting-and-calculating-of-the-probabiliti

评论： Martin Park 2013-10-4

Hallo, can somebody help me with my code. I am busy implementing the huffman code, but calculating the probabilities dont work right out. It has to take the two lowest probabilities and then add them together. Then it has to be sorted and done again until only two probabilities remain. This is what my program do do

933522222222222  0.954933333333333  0.977122222222222
0228777777777778  0.0228777777777778  0.0228777777777778
0221888888888889  0.0221888888888889  
0214111111111111

Here is my code:

    format long;
%clearing all variableas and screen
clear all;
close all;
clc;
%Reading image
a=imread('D:\face.tif');
figure,imshow(a)
%converting an image to grayscale
I=a;
%size of the image
[f,g]=size(I);
Totalcount=f*g;
%variables using to find the probability
cnt=1;
sigma=0;
%computing the cumulative probability.
for i=0:f
  k=I==i;
  count(cnt)=sum(k(:))
    %pro array is having the probabilities
    pro(cnt)=count(cnt)/Totalcount;
    sigma=sigma+pro(cnt);
    cumpro(cnt)=sigma;
    cnt=cnt+1;
end;
%Symbols for an image
symbols = [0:f];
%Order probabilities
for q=1:f
  matrix(1,q) = pro(q);
end;
sorted = sort(transpose(matrix),'descend');
%Sort probabilities and add them together
for n=2:f-1
  for m=1:f-n
        sorted(m,n) = sorted(m,n-1);
        if m==(f-n)
            sorted(f+1-n,n) = sorted(f+2-n,n-1)+sorted(f+1-n,n-1);
            final = sort(sorted,'descend');
        end
    end
end