Question

这是用于浏览图像和将图像转换为灰度的matlab gui代码有人请更正我的代码它不能正常工作，我尝试了很多，但不能得到它在这个错误

function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
set(handles.edit3, 'Visible','off');
% Build the complete filename
global im,im2
[filename, pathname]=uigetfile( {'*.jpg';'*.jpeg';'*.gif';'*.png';'*.bmp'},'Select file'); 
 MyImage = strcat(pathname, filename);

%This code checks if the user pressed cancel on the dialog.
        if isequal(filename,0) || isequal(pathname,0)
            uiwait(msgbox ('User pressed cancel','failed','modal')  )
            hold on;
        else
            uiwait(msgbox('User selected image sucessfully','sucess','modal'));
            hold off;      

        end
        im=imread(path);
        im=im2double(im); %converts to double
         %for backup process :)
imshow(MyImage,'Parent',handles.axes2);
title('INPUT IMAGE WITH NOISE')
handles.output = hObject;
guidata(hObject, handles);


% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a fusture version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata,handles,varargin)
global im
imblack=im;
rgb2gray(imblack);
imshow(imblack,'Parent',handles.axes2);
title(' IMAGE AFTER GRAYSCALE CONVERSION')
%gaussian filter:
  %set(handles.axes2, 'Visible','off');
  %set(handles.edit3, 'Visible','on');

Answer 1

这是更新后的代码

/((?:^|>)\s*)[^<>]+May[^<>]+(\s*(?:<|$))/g
    1st Capturing group ((?:^|>)\s*)
        (?:^|>) Non-capturing group
            1st Alternative: ^
                ^ assert position at start of the string
            2nd Alternative: >
                > matches the characters > literally
        \s* match any white space character [\r\n\t\f ]
            Quantifier: * Between zero and unlimited times, as many times as possible, giving back as needed [greedy]
    [^<>]+ match a single character not present in the list below
        Quantifier: + Between one and unlimited times, as many times as possible, giving back as needed [greedy]
        <> a single character in the list <> literally (case sensitive)
    May matches the characters May literally (case sensitive)
    [^<>]+ match a single character not present in the list below
        Quantifier: + Between one and unlimited times, as many times as possible, giving back as needed [greedy]
        <> a single character in the list <> literally (case sensitive)
    2nd Capturing group (\s*(?:<|$))
        \s* match any white space character [\r\n\t\f ]
            Quantifier: * Between zero and unlimited times, as many times as possible, giving back as needed [greedy]
        (?:<|$) Non-capturing group
            1st Alternative: <
                < matches the characters < literally
            2nd Alternative: $
                $ assert position at end of the string
    g modifier: global. All matches (don't return on first match)

所做的更改

1）function pushbutton1_Callback(hObject, eventdata, handles) % hObject handle to pushbutton1 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) set(handles.edit3, 'Visible','off'); % Build the complete filename global im [filename, pathname]=uigetfile( {'*.jpg';'*.jpeg';'*.gif';'*.png';'*.bmp'},'Select file'); MyImage = strcat(pathname, filename); %This code checks if the user pressed cancel on the dialog. if isequal(filename,0) || isequal(pathname,0) uiwait(msgbox ('User pressed cancel','failed','modal') ) hold on; else uiwait(msgbox('User selected image sucessfully','sucess','modal')); hold off; end im=imread(MyImage); im=im2double(im); %converts to double %for backup process :) imshow(im,'Parent',handles.axes2); title('INPUT IMAGE WITH NOISE') handles.output = hObject; guidata(hObject, handles); % hObject handle to pushbutton1 (see GCBO) % eventdata reserved - to be defined in a fusture version of MATLAB % handles structure with handles and user data (see GUIDATA) % --- Executes on button press in pushbutton2. function pushbutton2_Callback(hObject, eventdata,handles,varargin) global im imblack=rgb2gray(im); imshow(imblack,'Parent',handles.axes2); title(' IMAGE AFTER GRAYSCALE CONVERSION') %gaussian filter: %set(handles.axes2, 'Visible','off'); %set(handles.edit3, 'Visible','on');其中没有名称为im=imread(path);的变量。

2）path imshow(MyImage,'Parent',handles.axes2);包含文件路径。 MyImage包含图片。

3）im返回的值必须存储在变量中，以便在下一行中绘制。

4）rgb2gray(imblack);如果图像从上一个按钮回调中正确传递。然后将显示输入图像而不是灰度。

5）imshow(imblack,'Parent',handles.axes2); global im,im2未使用im2已删除

用于浏览图像和将图像转换为灰度的matlab gui代码

1 个答案: