How to get the gray level co-occurrence matrix feature which is energy, entropy and contrast of the image using GUI?

I want to create the GUI that can extract the gray gray level co-occurrence matrix feature which is energy, entropy and contrast of the image(bitmap). How to get that feature?

Answer 1

[Jiro Doke]

From Image Processing Toolbox, graycomatrix and graycoprops.

[Muhammad Harith Ramli]

I get an error when i try using graycomatrix and graycoprops. Here the code:

function pushbutton1_Callback(hObject, eventdata, handles)
global X;
[filename, pathname] = uigetfile({'*.bmp','All Image Files';...
          '*.*','All Files' },'title',...
          'D:\MRI\DOI');
X = imread([pathname,filename]);
axes(handles.axes1);
imshow(X);
minGL = min(X(:));
maxGL = max(X(:));
meanGL = mean(X(:));
GLCM = graycomatrix(X,'Offset',[2 0;0 2]);
stats = graycoprops(GLCM,{'contrast','energy'});
message = sprintf('The min gray level = %d.\nThe max gray level = %d.\nThe mean gray level = %g.\nThe contrast gray level = %g.\nThe energy gray level = %g.', minGL, maxGL,meanGL,stats);
uiwait(helpdlg(message));

[Jiro Doke]

You need to tell us exactly what the error is. Show us all of the error message.

[Muhammad Harith Ramli]

Here the error message:

Error using sprintf Function is not defined for 'struct' inputs.

Error in GUI>pushbutton1_Callback (line 91) message = sprintf('The min gray level = %d.\nThe max gray level = %d.\nThe mean gray level = %g.\nThe energy gray level = %g.\nThe contrast gray level = %g.', minGL, maxGL,meanGL,stats,stats1);

Error in gui_mainfcn (line 95) feval(varargin{:});

Error in GUI (line 42) gui_mainfcn(gui_State, varargin{:});

Error in matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)GUI('pushbutton1_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback

[Jiro Doke]

As you can tell from the first sentence of the error message, the error is not with graycomatrix or graycoprops. The error is that you are passing the structure returned by graycoprops as inputs to sprintf. Instead of

sprintf(' .... ', .... , stats)

it should be

sprintf(' .... ', .... , stats.Contrast, stats.Energy)

[Muhammad Harith Ramli]

Thanks for the answer. But why the output become like this:

Why it repeated the min , max and mean?

[Jiro Doke]

Take a look at the stats variable you get with graycoprops. Both the Contrast and Energy are two-element vectors, because you created a graycomatrix for two sets of offsets. So you have two contrast levels and two energy levels. Perhaps change the sprintf line to

message = sprintf('The min gray level = %d.\nThe max gray level = %d.\nThe mean gray level = %g.\nThe contrast gray level = [%g %g].\nThe energy gray level = [%g %g].', minGL, maxGL,meanGL,stats.Contrast,stats.Energy);

[Muhammad Harith Ramli]

Okay. Thanks for the help.

Answer 2

[Image Analyst]

Attached is my demo of glcm.