how to convert char array to two dimension image

2016 4 30
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更新时间：2016 5 1
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hello my gui brows an image and I want to apply edge method on this image but the problem that when i brows image it appear as string , so i cant apply edge method?? can anyone tell me how to solve this problem please ?

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Walter Roberson
Walter Roberson 2016-5-1
Please post your code.
It sounds like you might be trying to work on the name of the file rather than the content of the file.
sallam tanna
sallam tanna 2016-5-1
编辑：Walter Roberson 2016-5-1
function brows_Callback(hObject, eventdata, handles)
[filename pathname] = uigetfile({'*.tif'},'File Selector');
image = strcat(pathname, filename);
axes(handles.axes1);
imshow(image)
complete = strcat(pathname,filename);
set(handles.path,'string',complete);
% here the problem.. how can I apply edge method ?
[~, threshold] = edge(image, 'sobel');
fudgeFactor = .5;
BWs = edge(image,'sobel', threshold * fudgeFactor);
axes(handles.axes2);
imshow(BWs)
thank you in advance

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Walter Roberson
Walter Roberson 2016-5-1

0 个投票

  1. Do not name a variable image
  2. You need to read the content of the image file using imread()
  3. It is recommended to use fullfile() to construct the file names instead of strcat

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sallam tanna
sallam tanna 2016-5-1
function brows_Callback(hObject, eventdata, handles)
[filename pathname] = uigetfile({'*.tif'},'File Selector');
img = strcat(pathname, filename); axes(handles.axes1); imshow(img) complete = fullfile(pathname,filename); set(handles.path,'string',complete); X = imread(img);
% the same error here [~, threshold] = edge(X, 'sobel');
the same problem ! :(
sallam tanna
sallam tanna 2016-5-1
I solve the problem finally
this is the code
[filename pathname] = uigetfile({'*.tif'},'File Selector'); img = strcat(pathname, filename); axes(handles.axes1); imshow(img) complete = fullfile(pathname,filename); set(handles.path,'string',complete);
X = imread(img); X = rgb2gray(X); % to convert the image to two dimensional in order to use edge method
thank you for helping ^_^

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