error in displaying an image in axes of GUI

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Elysi Cochin
Elysi Cochin 2013-3-18
评论： Walter Roberson 2015-12-19
sir.... i cant load the image in the following link....
http://img832.imageshack.us/img832/5685/78540773.png
it is showing error as
??? Error using ==> imageDisplayValidateParams>validateCData at 114
Unsupported dimension
Error in ==> imageDisplayValidateParams at 31
common_args.CData = validateCData(common_args.CData,image_type);
Error in ==> imageDisplayParseInputs at 79
common_args = imageDisplayValidateParams(common_args);
Error in ==> imshow at 199
[common_args,specific_args] = ...
Error in ==> denoisemain>Select_Callback at 87
imshow(image);
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> denoisemain at 42
gui_mainfcn(gui_State, varargin{:});
Error in ==>
@(hObject,eventdata)denoisemain('Select_Callback',hObject,eventdata,guidata(hObject))
please can anyone help me to rectify this error....
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Walter Roberson
Walter Roberson 2013-3-18
The image is an RGB image that contains alpha data. You will need to use
if size(inputImage,3) == 4 %alpha
inputImage = inputImage(:,:,1:3); %strip alpha
end
if size(inputImage,3) == 3
inputImage = rgb2gray(inputImage); %convert to grayscale
end
Elysi Cochin
Elysi Cochin 2013-3-18
thank u sir.... saved lot of my time.... thank u sir...

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Keshav Dev Singh
Keshav Dev Singh 2015-12-19
编辑：Walter Roberson 2015-12-19
Hello, I have following code to plot 4 layers as,
Clafimage= cat(3, A, B, C, D); figure, ClafImage=imshow(Clafimage,[],'InitialMagnification','fit');
But it is showing below error,
Error using imageDisplayValidateParams>validateCData (line 117) Unsupported dimension.
Error in imageDisplayValidateParams (line 31) common_args.CData = validateCData(common_args.CData,image_type);
Error in imageDisplayParseInputs (line 79) common_args = imageDisplayValidateParams(common_args);
Error in imshow (line 220) [common_args,specific_args] = ...
Can anyone suggest how 4 or more layers can be show as a single classified image?
Thanks,
Keshav
  1 个评论
Walter Roberson
Walter Roberson 2015-12-19
Keshav,
In MATLAB, the third dimension is interpret as color channels, and MATLAB currently only supports displaying in RGB (though Alpha can also be used in calling sequences.)
To show multiple layers, you need to image() or imagesc() or imshow() all of them into the same place, and you need to specify AlphaData so that the parts below them are transparent in appropriate places.
For example,
image(A);
hold on
image(B, 'AlphaData', double(B~=0));
image(C, 'AlphaData', double(C~=0));
image(D, 'AlphaData', double(D~=0));
hold off
Here, D will show up in the places that D is non-zero, and in the places that D is 0 you will be able to see what is underneath. Underneath will show C in the places it is non-zero and it will show underneath that for the places C is zero, and so on.
In the special case where the images are all the same size and none of them are non-zero where any of the others are non-zero, then you can use
image(A+B+C+D);

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