uiwait and warning dialog problem

2013 5 6
1 个回答
回答已采纳
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0 个投票

Hi,
I use a load image button in GUI that contains the following code:
[path, file] = uigetfile({'*.jpg;*.gif','All Image Files'},' Select image')
imgFile = strcat(path,file);
I = imread(imgFile);
imgInfo = imfinfo(imgFile);
x=imgInfo.ColorType;
while x=='grayscale'
uiwait(warndlg('Please select a color image'));
end
I have to two problems: 1) When I click a grayscale image the warning dialog popups but I have to press the load image button in order to cancel it. I wish to click the ok causing the warning dialog to disappear. How do I do it? 2) When I exit run of the matlab code the warning dialog still appears and I cannot closed it. How to solve it?
Thanks.

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 采纳的回答

Image Analyst
Image Analyst 2013-5-6
编辑：Image Analyst 2013-5-6

0 个投票

Use this more robust code:
while true;
[baseFileName, folder] = uigetfile({'*.jpg;*.gif;*.png;*.tif;*.bmp','All Image Files'},' Select image')
if baseFileName == 0;
% They canceled out.
return;
end
fullFileName = fullfile(folder, baseFileName)
[originalImage, storedColorMap] = imread(fullFileName);
[rows, columns, numberOfColorChannels] = size(originalImage)
if numberOfColorChannels == 3 % Will be 3 for color.
% It's a color image.
uiwait(warndlg('Please select a grayscale image, not a color image.')); % Will Loop again
else
% It's an indexed or gray image.
if ~isempty(storedColorMap)
% It's an indexed, not grayscale, image.
uiwait(warndlg('Please select a grayscale image, not an indexed image.')); % Will Loop again
else
break; % It's color so continue on.
end
end
end
imshow(originalImage);

3 个评论
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Ely Raz
Ely Raz 2013-5-6
编辑：Ely Raz 2013-5-6
Thanks. My aim is to only allow color images. So I modifed your excelent code. Any comments?
....
if numberOfColorChannels < 3 % Will be 3 for color.
% It's a not a color image.
uiwait(warndlg('Please select a color image, not a gray scale image.')); % Will Loop again
else
% It's an indexed or color image.
if ~isempty(storedColorMap)
% It's an indexed, not grayscale, image.
uiwait(warndlg('PPlease select a color image, not an indexed image.')); % Will Loop again
else
....
Image Analyst
Image Analyst 2013-5-6
编辑：Image Analyst 2013-5-6
Looks like it should work. If it does, go with it.
Ely Raz
Ely Raz 2013-5-6
Sure thing. Thanks again

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