How to display image information using a pushbutton in GUI ?

Question

MashalS 2021-8-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/890067-how-to-display-image-information-using-a-pushbutton-in-gui

评论： Image Analyst 2021-8-1

CODE :

function Display_Information_Callback(hObject, eventdata, handles)
% hObject    handle to Display_Information (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
[filename pathname]=uigetfile({' *.jpg';'*.png'},'File Select');
image=strcat(pathname,filename);
[pathstr,name ,ext ,versn]=fileparts(filename);
fileinfo=imfinfo(image);
FileSize1=fileinfo.FileSize(1,1);
sizew=fileinfo.Width(1,1);
sizeh=fileinfo.Height(1,1);
axes(handles.axes2)
imshow(image)
set(handles.edit5,'string',name);
set(handles.edit7,'string',sizew);
set(handles.edit8,'string',sizeh);
set(handles.edit6,'string',FileSize1);
set(handles.edit9,'string',ext);
set(handles.edit11,'string',image);

GUI Designed :

ERROR :

Error using

fileparts

Too many

output

arguments.

Error in

userspecified>Display_Information_Callback

(line 160)

[pathstr,name

,ext

,versn]=fileparts(filename);

Error in

gui_mainfcn

(line 95)

feval(varargin{:});

Error in

userspecified

(line 42)

gui_mainfcn(gui_State,

varargin{:});

Error in

matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)userspecified('Display_Information_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback.

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Answer 1

Image Analyst 2021-8-1

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/890067-how-to-display-image-information-using-a-pushbutton-in-gui#answer_758337

在 MATLAB Online 中打开

fileparts() does not report version number. Try this (with a number of other imnprovements):

[filename, pathname] = uigetfile({' *.jpg';'*.png'},'File Select');
fullFileName = fullfile(pathname,filename);
[folder, baseFileNameNoExt, ext] = fileparts(fullfileName);
fileinfo = imfinfo(fullFileName);
FileSize1 = fileinfo.FileSize(1,1);
axes(handles.axes2)
theImage = imread(fullFileName);
[rows, columns, numberOfColorChannels] = size(theImage);
imshow(theImage);
handles.edit5.String = baseFileNameNoExt;
handles.edit7.String = columns;
handles.edit8.String = rows;
handles.edit6.String = FileSize1;
handles.edit9.String = ext;
handles.edit11.String = fullFileName;

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MashalS 2021-8-1

在 MATLAB Online 中打开

If i want to display information of an image that is already being displayed in gui and as i click "display information" button i donot have to select the image again , how can i achieve it? I have changed the first line , is it correct?

a = getappdata(0,'a',[pathname,filename]);
fullFileName = fullfile(pathname,filename);
[folder, baseFileNameNoExt, ext] = fileparts(fullFileName);
fileinfo = imfinfo(fullFileName);
FileSize1 = fileinfo.FileSize(1,1);
axes(handles.axes2)
theImage = imread(fullFileName);
[rows, columns, numberOfColorChannels] = size(theImage);
imshow(theImage);
handles.edit5.String = baseFileNameNoExt;
handles.edit7.String = columns;
handles.edit8.String = rows;
handles.edit6.String = FileSize1;
handles.edit9.String = ext;
handles.edit11.String = fullFileName;

ERRORS :

Undefined function or

variable 'pathname'.

Error in

userspecified>Display_Information_Callback

(line 159)

a =

getappdata(0,'a',[pathname,filename]);

Error in gui_mainfcn (line

95)

feval(varargin{:});

Error in userspecified (line

42)

gui_mainfcn(gui_State,

varargin{:});

Error in

matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)userspecified('Display_Information_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback.

MashalS 2021-8-1

I could'nt understand.Kindly see the GUI below. For example, i have browsed this image, when i shall click 'display information', it should only display the information ,without selecting the image again.That's what i want to do.

Image Analyst 2021-8-1

在 MATLAB Online 中打开

Have two functions, each one a callback for the corresponding button. One button to read in the image and display it's information, and the other button to simply display the image but not read it in again with imread().

%=====================================================================
% Button callback function to read in image and display information.
function Read_Info_and_Display_Information_Callback(hObject, eventdata, handles)
% Read in image and display info.
handles = Read_Info_and_Display_Information(handles, true);
% Update handles structure
guidata(hObject, handles);
return; % from Read_Info_and_Display_Information_Callback()
%=====================================================================
% Button callback function to display existing information only.
function Display_Information_Callback(hObject, eventdata, handles)
% Don't read in image (assume it's been done already).
% Just display information again.
handles = Read_Info_and_Display_Information(handles, false);
% Update handles structure
guidata(hObject, handles);
return; % from Display_Information_Callback()
%=====================================================================
% Function to optionally read in image, 
% and to display information about the image.
function handles = Read_Info_and_Display_Information(handles, readFromDisk)
if readFromDisk
    [filename pathname]=uigetfile({' *.jpg';'*.png'},'File Select');
    [filename, pathname] = uigetfile({' *.jpg';'*.png'},'File Select');
    fullFileName = fullfile(pathname,filename);
    handles.fullFileName  = fullFileName;
end
fullfileName = handles.fullfileName;
[folder, baseFileNameNoExt, ext] = fileparts(fullfileName);
fileinfo = imfinfo(fullFileName);
FileSize1 = fileinfo.FileSize(1,1);
axes(handles.axes2)
theImage = imread(fullFileName);
[rows, columns, numberOfColorChannels] = size(theImage);
imshow(theImage);
handles.edit5.String = baseFileNameNoExt;
handles.edit7.String = columns;
handles.edit8.String = rows;
handles.edit6.String = FileSize1;
handles.edit9.String = ext;
handles.edit11.String = fullFileName;
return; % from Read_Info_and_Display_Information()