Error in horzcat

Hey ! I am trying to make a template of my braille character set and I keep getting the following error. I used the same code for OCR and it works perfectly. What do I do ?

I am attaching the code herewith,

%Letter
A=imread('CharacterSet\a.bmp');B=imread('CharacterSet\b.bmp');
C=imread('CharacterSet\c.bmp');D=imread('CharacterSet\d.bmp');
E=imread('CharacterSet\e.bmp');F=imread('CharacterSet\f.bmp');
G=imread('CharacterSet\g.bmp');H=imread('CharacterSet\h.bmp');
I=imread('CharacterSet\i.bmp');J=imread('CharacterSet\j.bmp');
K=imread('CharacterSet\k.bmp');L=imread('CharacterSet\l.bmp');
M=imread('CharacterSet\m.bmp');N=imread('CharacterSet\n.bmp');
O=imread('CharacterSet\o.bmp');P=imread('CharacterSet\p.bmp');
Q=imread('CharacterSet\q.bmp');R=imread('CharacterSet\r.bmp');
S=imread('CharacterSet\s.bmp');T=imread('CharacterSet\t.bmp');
U=imread('CharacterSet\u.bmp');V=imread('CharacterSet\v.bmp');
W=imread('CharacterSet\w.bmp');X=imread('CharacterSet\x.bmp');
Y=imread('CharacterSet\y.bmp');Z=imread('CharacterSet\z.bmp');
%Number
one=imread('CharacterSet\1.bmp');  two=imread('CharacterSet\2.bmp');
three=imread('CharacterSet\3.bmp');four=imread('CharacterSet\4.bmp');
five=imread('CharacterSet\5.bmp'); six=imread('CharacterSet\6.bmp');
seven=imread('CharacterSet\7.bmp');eight=imread('CharacterSet\8.bmp');
nine=imread('CharacterSet\9.bmp'); zero=imread('CharacterSet\0.bmp');

letter=[A B C D E F G H I J K L M N O P Q R S T U V W X Y Z];
number=[one two three four five six seven eight nine zero];
character=[letter number];
templates=mat2cell(character,42,[24 24 24 24 24 24 24 ...
    24 24 24 24 24 24 24 ...
    24 24 24 24 24 24 24 ...
    24 24 24 24 24 24 24 ...
    24 24 24 24 24 24 24 24]);
save ('templates','templates')
clear all

What is the problem ? =O

Answer 1

[Siddharth Mallya]

Got the answer. The character set my mates gave me were 3D and I am using an 2D matrix

Answer 2

[Matt Fig]

It would really help if you indicated which line errors, as I am sure you could guess if you put yourself in our shoes - but anyway...

If the error is on the line which assigns 'letter', then at least one of your CharacterSet images is not the same size as the others.

If the error is on the line which assigns 'number', then at least one of your CharacterSet images is not the same size as the others.

If the error is on the line which assigns 'character', then perhaps the 'letter' and 'number' variables aren't the same size.

.

.

By the way, you could do something much easier, like this:

T = char([97:122 48:57]);
templates = cell(1,length(T));

for ii = 1:length(T)
    templates{ii} = imread(['CharacterSet\',T(ii),'.bmp']);
end

[Jan]

Thanks, Matt, for posting the simplificated version. It supports the rule of thumb: "Less commands, less bugs".

[Matt Fig]

I thought you were being poetic, perhaps mixing German and English, with:

"Lett..."

[Siddharth Mallya]

@Matt,

clc;

T = char([97:122 48:57]);

for ii = 1:length(T)

init = imread(['CharacterSet\',T(ii),'.bmp']);

init = rgb2ind(init,2);

imwrite([24 42], '[CharacterSet\',T(ii), 'bmp');

end

I am trying to convert my 3D images to 2D using this .. but it just isn't seeming to work. I get this error -->

??? Error using ==> imwrite at 376

Unable to determine the file format from the filename.

Error in ==> convert at 6

imwrite([24 42], '[CharacterSet\',T(ii), 'bmp');

[Matt Fig]

I think you are using IMWRITE incorrectly. I cannot try it out because I don't have rgb2ind, but if this function returns a 2D matrix, then you need to tell IMWRITE to save it in some form of image that is 2D. Look at the help for IMWRITE to see the correct usage.

[Siddharth Mallya]

Okay, I added a line saying,

B = zeros ([24 42]);

for ----

...

IMWRITE (B, '[CharacterSet\',T(ii), 'bmp');

...

still doesn't work .. =/

[Matt Fig]

You are missing a ]. You have:

'[CharacterSet\',T(ii)

but you should have:

['CharacterSet\',T(ii),'.bmp']

[Siddharth Mallya]

Ya .. No. I made a mistake while typing it here. The error I get is this exactly,

Error using ==> imwrite at 394

Cannot open $#^#$% file for writing

You may not have write permission