MATLAB: To display multiple images on a single frame

image processing

I tried to display a X-Ray image .. and it successfully working. the code is below..

Y = dicomread('C:\Users\Rehana\Desktop\dicom\test.DCM');
imshow(Y);
imcontrast;

but getting error in the below code, here i am trynig to display multiple images on a single frame .. please help me..

load dicom
[X2,map2] = imread('C:\Program Files\MATLAB\images\'test'*.DCM');
subplot(1,2,1), subimage(X,map)
subplot(1,2,2), subimage(X2,map2)

in this case 'images' is one folder where i stored test1.DCM, test2.DCM,test3.DCM,test4.DCM ( samples of x-ray images )files.

Best Answer

Hi,

It seem you tried to display multiple dicom files in a folder but you use wrong syntax.

And please don't use imread to read dicom file. Use dicomread instead.

Assume that I have 4 dicom files in folder named 'New Folder'.

files = dir(fullfile(pwd,'New Folder\*.dcm'));
for i = 1 : numel(files)
    [X map] = dicomread(fullfile(pwd,'New Folder',files(i).name));
    if ~isempty(map)
        subplot(2,2,i); 
        subimage(X,map);
    else
        subplot(2,2,i); 
        imshow(X,[]);
    end
end

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% Directory
directory = 'C:\Datasets\nyu\train\';
img_dir = fullfile(directory, 'image_02');
depth_dir = fullfile(directory, 'depth');
image_rgb_info  = dir( fullfile(img_dir, '*.jpg'));
image_rgb_filenames = fullfile(img_dir, {image_rgb_info.name} );
image_depth_info = dir( fullfile(depth_dir, '*.png'));
image_depth_filenames = fullfile(depth_dir, {image_depth_info.name} );

MATLAB: Displaying images with GUI in matlab

Hi,

You asked me 'what about for huge number of images in a folder??'

I think of course we cannot create so many axes in this figure,

so I decided to display them in single axes.

Just use button 'back' and 'next' to display your next or previous image.

Here the code :

function varargout = untitled(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @untitled_OpeningFcn, ...
                   'gui_OutputFcn',  @untitled_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})    gui_State.gui_Callback = str2func(varargin{1});    end
if nargout    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else    gui_mainfcn(gui_State, varargin{:});    end
function untitled_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
handles.files = dir(fullfile('C:','Program Files','MATLAB','images\*.dcm'));
for i = 1 : length(handles.files)
    handles.X{i} = dicomread(fullfile('C:','Program Files','MATLAB','images',handles.files(i).name));   
end
imshow(handles.X{1},[]);
handles.index = 1;
Cek(hObject, eventdata, handles);
guidata(hObject, handles);
function varargout = untitled_OutputFcn(hObject, eventdata, handles) 
varargout{1} = handles.output;
function pushbutton1_Callback(hObject, eventdata, handles)
handles.output = hObject;
handles.index = handles.index - 1;
Cek(hObject, eventdata, handles);
imshow(handles.X{handles.index},[]);
guidata(hObject, handles);
function pushbutton2_Callback(hObject, eventdata, handles)
handles.output = hObject;
handles.index = handles.index + 1;
Cek(hObject, eventdata, handles);
imshow(handles.X{handles.index},[]);
guidata(hObject, handles);
function Cek(hObject, eventdata, handles)
handles.output = hObject;
n = length(handles.files);
if handles.index > 1,  set(handles.pushbutton1,'enable','on');
else                           set(handles.pushbutton1,'enable','off'); end
if handles.index < n, set(handles.pushbutton2,'enable','on');
else                           set(handles.pushbutton2,'enable','off'); end
guidata(hObject, handles);

Please design the correct GUI as shown in the picture.

the tag for axes is axes1, tag for 'back' button is pushbutton1, tag for 'next' button is pushbutton2.

If you design it correctly, I believe no error will occurs.

Best Answer

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