How to display an image in axes of GUI in the function I added

I'm trying to display an image in GUI but a problems is that I can not display image in axes in the function I added: function BytesAvailable_Callback(obj,event) , when i call : axes(handles.axes1) imshow('image1.jpg') then it do not display in axes but display in new window figure1.

If i call axes(handles.axes1); imshow('image1.jpg') in any button function, it correctly display in that axes. Why?

My code:

%-----------------HAM HIEN VIDEO-------------------------

global vidobj; global hand; % create the video object with the desired resolution vidobj =videoinput('winvideo',1,'YUY2_640x480');%, info.DeviceInfo(1,1).SupportedFormats{1}); set(vidobj, 'FramesPerTrigger', 1); set(vidobj, 'ReturnedColorSpace', 'rgb');

% create a handle to the axes where the image will be displayed vidRes = get(vidobj, 'VideoResolution'); nBands = get(vidobj, 'NumberOfBands'); hImage = image( zeros(vidRes(2), vidRes(1), nBands), 'parent', handles.video);

% identify which function is associated with the UpdatePreviewWindowFcn % video_preview_fcn (see below) is called automatically each time the camera has an image available - you don't need to call this function setappdata(hImage, 'UpdatePreviewWindowFcn', @video_preview_fcn);

% call preview to start the live image feed preview(vidobj,hImage);

%srcObj1 = get(vidobj, 'Source'); % Tuy chinh mau cho video %set(srcObj1(1), 'Brightness', 10);

%-------------------- HIEN ANH LEN GIAO DIEN------------------------

      s=serial('COM7');
      s.BytesAvailableFcn = @BytesAvailable_Callback
      fopen(s); 

    % fclose(s);
       %ind = fscanf(s);
        %i=isempty(ind)

   *%This function I added to read data from RS232 port, then processing this    data and make it as a conditon to display image but can not  *
%---------------------- Serial_Callback

function BytesAvailable_Callback(obj,event)

    global hand;    
    global vidobj;
    ind = fscanf(obj) 

    %--------Moi them vao - Trung ----
    fid = fopen('mavach.txt', 'at'); 
    fprintf(fid,'%s\n\n',ind);%Write 'word' in text file (upper)
   % set(handles.mavach,'String',ind);  
    fclose(fid);
    %---------------------------------

    % Edit code here - Ngo Hai Bac    
    set(hand.mavach,'String',ind); 

     %   if(~isempty(ind))

    % Neu co ma vach thi chup anh-----------
    testpic = getsnapshot(vidobj);
  imwrite(testpic,'image1.jpg');
    _axes(hand.image)
    imshow('image1.jpg');_

% I can not display this image in axes because it always diplay in new window

    %--------Xuat ma vach ra file txt ----
    fid = fopen('mavach.txt', 'at'); 
%    fprintf(fid,'%s\n',ind);       %Write 'word' in text file (upper)
    fclose(fid);
    %---------------------------------

%------------------------------------------------------------------

%------------NHAN DANG BIEN SO XE------------------

    % Nhi phan anh
    BW = imread('image1.jpg');
    I1 = rgb2gray(BW);
    I1 = medfilt2(I1,[3 3]);     % Loc trung vi
    level=graythresh(I1);
    BW1=im2bw(I1,level);

    BW1 = bwareaopen(BW1,350);  % Loai bo nhung doi tuong be hon 350 pixel

%-----------TIM VUNG BIEN SO XE---------------------

    object = regionprops(BW1);

    for index=1:length(object)

        %BoundingBox co 2 thanh phan tra ve la [ul_corner width]
        % ul_corner: toa do [x y]chi goc phia tren cung ben trai cua box
        % width: [x_width y_width] chieu rong va chieu cao cua box

        if object(index).Area > 50000 && object(index).BoundingBox(3)/object(index).BoundingBox(4) > 0.5

        x = ceil(object(index).BoundingBox(1)+4)      % Lam tron len
        y= ceil(object(index).BoundingBox(2)+4)        %Toa do

        widthX = floor(object(index).BoundingBox(3)-15)    % Lam tron xuong
        widthY = floor(object(index).BoundingBox(4)-9)     % Chieu cao va chieu dai

        subimage(index) = {BW(y:y+widthY,x:x+widthX,:)}; 
        subimage{index}=~subimage{index};
       % figure,imshow(subimage{index});

        BW1= subimage{index};
        end
    end

    imwrite(BW1,'image2.jpg')
    axes(hand.plateimage)
    imshow('image2.jpg')

%This image is too...

Answer 1

[Image Analyst]

I had this weird thing once with live video. Sean De Wolski was trying to explain it to me over the phone. He had some reason for it and I think his "solution" was to write the image directly to the "cdata" property of the axes instead of using imshow(). I never did that, and I dropped the project for a few weeks and when I came back to it, I didn't have that problem anymore and didn't have to use Sean's workaround. I don't know what happened to "fix" it. Perhaps Sean will chime in here with an explanation.

[leo]

How to write image directly to the "cdata" property?

h = image(X); colormap(map) Y = get(h,'CData'); I find this in help but don't know how?

[Image Analyst]

set(gca, 'cData', X);

Answer 2

[renuka]

I wanted to diaplay all images in a folder one by one on the same axes using Matlab GUI. My below code is displaying only first image in the folder? kndly give the solution

handles.output = hObject;

filelist=dir(fullfile('E:\desktop\MATLAB\img-seg\CNN\ias1\*.jpg'));

handles.filelist = filelist;

handles.frameindex = 1;

% Update handles structure

guidata(hObject, handles);

axes(handles.axes1);

filelist = handles.filelist;

frameindex = handles.frameindex;

myfolder='E:\desktop\MATLAB\img-seg\CNN\ias1';

currentframefile = filelist(frameindex).name;

handles.frameindex = frameindex+1;

ff=fullfile(myfolder,currentframefile);

I=imread(ff);

imshow(I);

guidata(hObject, handles);

[Image Analyst]

See sample code in the FAQ:

https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F