Galois field to binary matrix conversion (BCH encoding)
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Neeraj Chimwal
el 14 de Abr. de 2021
Editada: Walter Roberson
el 15 de Abr. de 2021
Hii.
I am trying to encode/decode an image using BCH encoder
I did this code
n = 255;
img = imread('pout.tif');
toBinary = img > 102; %convert image to binary
resized = imresize(toBinary, [291 247]); %resize image to get proper encoding ratio
[row k] = size(resized);
msg = gf(resized); %create galios field message
enc = bchenc(msg,n,k);
noisycode = enc + randerr(row,n);
[decmsg,numerr] = bchdec(noisycode,n,k)
isequal(msg,decmsg)
Code might seem dirty as I am new to MATLAB.
The code works fine (I think) but the problem is that final output is a galois field.
I want to convert it to binary matrix i.e my binary Image.
I couldn't find any way to it.
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Walter Roberson
el 14 de Abr. de 2021
NC = noisycode.x;
That will be uint32 with min 0 and max 0, so you can logical() it or double() it or uint8() it as appropriate for your purpose.
3 comentarios
Walter Roberson
el 14 de Abr. de 2021
Editada: Walter Roberson
el 15 de Abr. de 2021
For gf specifically, it retrieves the values used to create the matrix. It is not documented but is found if you ask for properties(noisycode)
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