Here
is an example to convert an image into a text file in matlab, for processing in
HDL (verilog) or in someother tool. Also the text file is further converted into image
file.
An image is a 2D matrix. For converting into text file,
it needs to be converted into 1D matrix and then to text file using file
write in matlab. The image size is also a constraint, so it needs to be
fixed for conversion. Then converted to 1D matrix using reshape command. Then
write into text file.
A=imread('1.bmp');
B=rgb2gray(A);
disp('Image file read successful');
%figure,imshow(B),title('org');
C=imresize(B,[isize isize]);
figure,imshow(C),title('croped');
d=reshape(C,1,[]);
disp('Reshapping done');
fid = fopen('img.txt', 'wt');
fprintf(fid, '%8d\n', d);
disp('Text file write done');disp(‘ ‘);
fclose(fid);
For converting text file
into image, it needs to be converted from 1D matrix and then to image. The
image size must same as previous for processing text into image. Then converted
to 1D matrix using reshape command. Then write into text file.
·
First, the text file
is read using file
read as vector (1D matrix).
·
Then it has to be
converted to matrix.
·
Finally transpose to
complete it as image.
fidh = fopen('img.txt');
Ah = fscanf(fidh, '%g %g', [1 inf]);
disp('Text file read done');
fclose(fidh);
S1h= vec2mat(Ah,isize,isize);
disp('Vector conversion done');
%c=imresize(S1,[128 128]);
Sh= transpose(S1h);
Jh=uint8(Sh);
disp('Image is ready');
imwrite(Jh,['newimage','.jpg']);
figure,imshow(Jh),title('IMAGE form TEXT file');
OUTPUT:
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