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From: Dave on 28 Jun 2010 08:23
I need to access a bunch of images from a folder.For this purpose I used GUIDE tool and I got different errors in different situations as below.

==>Trial 1:

function pushbutton1_Callback(hObject, eventdata, handles)
clc;
[filename,pathname] = uigetfile({'*.png';'*.jpg'},'Select Your Images','Multiselect','on');
%imagename = strcat(pathname,filename);
msgbox(pathname);
flength = length(filename);
plength = length(pathname);
for pcount=1:plength
for flength=1:flength
pname = pathname(plength);
fname = filename(flength);
ifname=strcat(pname,fname);
msgbox(ifname);
inimage = imread(ifname);
figure,imshow(inimage);
end
end

Error I got:
?? Conversion to logical from cell is not
possible.
Error in ==> imread at 282
if (strfind(filename, '://'))
Error in ==> GUIDEMO1>pushbutton1_Callback at
91
inimage = imread(ifname);
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> GUIDEMO1 at 42
gui_mainfcn(gui_State, varargin{:});
??? Error while evaluating uicontrol Callback

This may be due to the back slash(\) that appears at the end of the path name and at the beginning of the file name .My question is how to remove that back space??

==>Trial2:

I concatenated both filename and pathname into imagename(it is a cell).
without any back slash problem,but when I tried to use the function imread().

function pushbutton1_Callback(hObject, eventdata, handles)
clc;
[filename,pathname] = uigetfile({'*.png';'*.jpg'},'Select Your Images','Multiselect','on');
imagename = strcat(pathname,filename);
msgbox(imagename);
listlength =length(imagename);
%celldisp(imagename);
%sizeinstr = num2str(listlength);
%msgbox(sizeinstr)
%x=iscellstr(imagename)
for count=1:listlength
location=imagename(1,count);
msgbox(location);
imageread = imread(location);
imshow(imageread);
image2=rgb2gray(image1);
image3=im2uint8(image1);
figure,imshow(image3);
cnt = num2str(count);
msgbox(cnt)
end

Error I got(Same as previous one):

??? Conversion to logical from cell is not
possible.
Error in ==> imread at 282
if (strfind(filename, '://'))
Error in ==> GUIDEMO1>pushbutton1_Callback at
105
imageread = imread(location);
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> GUIDEMO1 at 42
gui_mainfcn(gui_State, varargin{:});
??? Error while evaluating uicontrol Callback


==>Trial3:


Now Iam able to view the images without using imread,rgb2gray,im2uint8 functions by accessing the image as imagename{1,count}

for count=1:listlength
image=imagename{1,count};
%msgbox(location);
imshow(imaged);
image2=rgb2gray(image);
image3=im2uint8(image2);
figure,imshow(image3);
cnt = num2str(count);
msgbox(cnt)
end

Error:
??? Error using ==> rgb2gray>parse_inputs at 82
MAP must be a m x 3 array.
Error in ==> rgb2gray at 35
X = parse_inputs(varargin{:});
Error in ==> GUIDEMO1>pushbutton1_Callback at
107
image2=rgb2gray(location);
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> GUIDEMO1 at 42
gui_mainfcn(gui_State, varargin{:});
??? Error while evaluating uicontrol Callback


My query is a bit lengthy please excuse me but, I am at the end of my task.At this point I got the above problem.Could any one help me out.

Regards,
Dave.
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