Galois field to binary matrix conversion (BCH encoding)

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.

Answer 1

[Walter Roberson]

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.

[Neeraj Chimwal]

It worked. Thankyou.

If you don't mind, can you please explain me what that instruction did?

[Walter Roberson]

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)

https://www.mathworks.com/help/comm/ref/gf.html

[Neeraj Chimwal]

thanks