How can i read images for filtering using if else condition in GUI?

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siti 2014-12-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/165523-how-can-i-read-images-for-filtering-using-if-else-condition-in-gui

评论： Image Analyst 2014-12-8

采纳的回答： Image Analyst

在 MATLAB Online 中打开

function popupmenu3_Callback(hObject, eventdata, handles)

 popupimage=get(popupmenu3.handles,'value');
img=imread('flower.jpg');
img1=imread('balloon.jpg');

%average

 if
 popupimage==img
    e=fspecial('average',[33])
    A=imfilter(img,e);
    axes(handles.axes2);
    imshow(A);
 else if popupimage==img1
   e=fspecial('average',[33])        
   B=imfilter(img1,e);        
   axes(handles.axes2);     
   imshow(B);
 end

采纳的回答

Image Analyst 2014-12-5

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/165523-how-can-i-read-images-for-filtering-using-if-else-condition-in-gui#answer_161344

在 MATLAB Online 中打开

Try this:

selectedItem = get(popupmenu3.handles,'value');
img=imread('flower.jpg');
img1=imread('balloon.jpg');
%average
e=fspecial('average',[33])
axes(handles.axes2);
if selectedItem == 1
  A=imfilter(img,e);
  imshow(A);
elseif selectedItem == 2
  B=imfilter(img1,e);
  imshow(B);
end

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Image Analyst 2014-12-5

在 MATLAB Online 中打开

Siti's "Answer" moved here:

thanks again,now i can do the filtering process..but sometimes the output showing the different image. Actually what i'm trying to do is to read the images from files

function Graybutton_Callback(hObject, eventdata, handles)
path='G:\IP.projek\grayImg';
filter='*.jpg';
selectedFile=uigetfile(fullfile(path, filter));
axes(handles.axes1);
imshow(selectedFile);
function ColorButton_Callback(hObject, eventdata, handles)
path='G:\IP.projek\color img';
filter='*.jpg';
selectedFile=uigetfile(fullfile(path, filter));
axes(handles.axes1);
imshow(selectedFile);

and then i choose flower image in color img folder for example,then i want to apply filtering process.Currently i'm using popup menu for the list of filters .So now i'm just a little bit confuse.does i need to use switch case for every filter that i'm going to use? And in every case should i put if else condition for different images that i'm going to filter?.if yes,how to do it? i'm sorry for asking this but i really don't know.

Image Analyst 2014-12-7

在 MATLAB Online 中打开

siti's "Answer" moved here since it contains another question and appears not to be a final answer to the original question, but a reply to me.

Thanks,i already use this coding.

 function LoadImg_Callback(hObject, eventdata, handles)
 % hObject    handle to LoadImg (see GCBO)
 % eventdata  reserved - to be defined in a future version of MATLAB
 % handles    structure with handles and user data (see GUIDATA)
  contents = get (handles.listbox1,'Value');
 switch contents
    case 1
         A=imread('flower.jpg');
         axes(handles.axes1);
         imshow(A);
    case 2
         A=imread('balloon.jpg');
         axes(handles.axes1);
         imshow(A);
    case 3
         A=imread('Grayflower.jpg');
         axes(handles.axes1);
         imshow(A);
    case 4
         A=imread('Grayballoon.jpg');
         axes(handles.axes1);
         imshow(A);
 end

And i wanna ask.how can i get images from listbox to be filter in popup menu?i dont know how to write the code so that all the images in listbox can be used to filter in popup menu.

Image Analyst 2014-12-7

在 MATLAB Online 中打开

First try this. Have the callbacks of both the listbox and the popup call the same function called DisplayAndFilterImage. Nothing else, just simple a line like this:

DisplayAndFilterImage(handles)

Now define that function like this:

function DisplayAndFilterImage(handles)
% Get selected listbox index.
selectedItem = get(handles.listboxImg, 'Value');
% If more than one is selected, bail out.
if length(selectedItem) > 1
  return;
end
% If only one is selected, display it.
% First you need to get a list of all the items in the listbox.
ListOfImageNames = get(handles.lstImageList, 'string');
% Now construct the filename.
baseImageFileName = cell2mat(ListOfImageNames(selectedItem));
fullImageFileName = [handles.imageFolder '\' baseImageFileName];  % Prepend folder.
% Now read in the image.
rgbImage = imread(fullImageFileName);
% Now display the image in axes1.
axes(handles.axes1);
imshow(rgbImage);
title(baseImageFileName, 'FontSize', 20);
% Now get what filter they chose.
selectedPopupIndex = get(handles.popup1, 'Value');
axes(handles.axes2); % We'll show result in axes 2.
switch selectedPopupIndex 
    case 1
        % Median filter, or whatever.
        filteredImage = medfilt2(rgbImage);
        imshow(filteredImage);
    case 2
        % Your own custom filter, or whatever.
        filteredImage = MyFilter(rgbImage);
        imshow(filteredImage);
end