when I use the slider in MATLAB gui to display images stored in a matrix an error is shown.

Question

Deandra Dsouza 2016-5-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/284651-when-i-use-the-slider-in-matlab-gui-to-display-images-stored-in-a-matrix-an-error-is-shown

评论： Deandra Dsouza 2016-5-17

Since am performing image processing techniques after storing the data in the matrix, its required that I use setappdata and getappdata to move the data around.However after I pass it to the final function , after about 9 frames the 10th frame gives an error.

the error being-

Error using images.internal.imageDisplayValidateParams>validateCData (line 115)
Multi-plane image inputs must be RGB images of size MxNx3.
Error in images.internal.imageDisplayValidateParams (line 27)
common_args.CData = validateCData(common_args.CData,image_type);
Error in images.internal.imageDisplayParseInputs (line 78)
common_args = images.internal.imageDisplayValidateParams(common_args);
Error in imshow (line 223)
  [common_args,specific_args] = ...
Error in MAINTRIAL2>slider2_Callback (line 240)
imshow(P(:,:,C1),'parent',handles.axes6);
Error in gui_mainfcn (line 95)
        feval(varargin{:});
Error in MAINTRIAL2 (line 42)
    gui_mainfcn(gui_State, varargin{:});
Error in @(hObject,eventdata)MAINTRIAL2('slider2_Callback',hObject,eventdata,guidata(hObject)),

Please do help

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Answer 1

Walter Roberson 2016-5-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/284651-when-i-use-the-slider-in-matlab-gui-to-display-images-stored-in-a-matrix-an-error-is-shown#answer_222483

在 MATLAB Online 中打开

C1 = str2double( get(handles.edit2,'String') );

Or better yet, just index by C as it is already the numeric value.

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Deandra Dsouza 2016-5-17

worked like a charm! thanks!

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Answer 2

Image Analyst 2016-5-17

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/284651-when-i-use-the-slider-in-matlab-gui-to-display-images-stored-in-a-matrix-an-error-is-shown#answer_222478

在 MATLAB Online 中打开

What does this code show in the command window if you put it just before line 240:

whos P
whos C1
C1

What happens if you visit this link?

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Deandra Dsouza 2016-5-17

编辑：Walter Roberson 2016-5-17

在 MATLAB Online 中打开

C=get(hObject,'Value');
% tr2=(tr1);
assignin('base','sliderVal',C);
set(handles.edit2,'String',num2str(round(C)));
C1=get(handles.edit2,('String'));
disp('C1')
disp(C1)
disp('C')
disp(C)
P=getappdata(0,'Segmented');
O=getappdata(0,'thresholding');
% figure();
% subplot(1,2,1);
imshow(P(:,:,C1),'parent',handles.axes6);
% subplot(1,2,2);
imshow(O(:,:,C1),'parent',handles.axes7);
guidata(hObject,handles);