MATLAB Answers

reading multiple images - strcat

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Raviteja
Raviteja on 20 Sep 2011
Commented: elz tomz on 9 Jul 2018
In a folder I have 50 images of 5 subjects 10 each. (all are .jpg format) I named them as
sub1 (1)
sub1 (2)
...
...
sub1 (10)
sub2 (1)
sub2 (2)
...
...
...
...
..
sub5 (10)
I want to read them in matlab.
I have written following code in matlab
for i=1:5
for j=1:10
name=strcat('sub',int2str(i), ,'(',int2str(j),')','.jpg');
I=imread(name);
% some code
% some code
end
end
in the above code problem is with strcat can you please correct the above code. and can you give any alternative way to read all these images from the folder ?
  3 Comments
Jan
Jan on 20 Sep 2011
@Raviteja: A space is *not* a null character. Does my answer using SPRINTF solve your problem?

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Answers (2)

Jan
Jan on 20 Sep 2011
Unfortuanely STRCAT removes marginal spaces from its inputs:
strcat('a', ' ', 'b')
>> ab
This was necessary when string lists have been implemented as CHAR matrices before CELLs have been invented - if I remember correctly this happend in Matlab 4.1.2. Using the CAT command is not influenced by this "smart" unblanking.
For your problem SPRINTF seems to be more convenient and it is not influenced by spaces:
name = sprintf('sub%d (%d).jpg', i, j);

SHEKHAR YADAV
SHEKHAR YADAV on 6 Jul 2015
for i=1:5 for j=1:10; strcat('d',int2str(i),int2str(j))=a(i,:)-b(j,:)
  3 Comments
elz tomz
elz tomz on 9 Jul 2018
for i=1:50 { A=imread(strcat('your image path\','iMAGE STARTING LETTER',int2str(i),'.bmp')); figure;imshow(A); }
just try it out

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