multiple images in one figure using a scrollbar

I have a number of 2D dicom images (some monochrome, some RGB, also different sizes) that I want to display in one Figure, with the ability to scroll from one image to another in the Figure. How can I do this?

Thanks

PV

Answer 1

[Deepak]

Hi Prashant,

As I understand it, you have several “dicom” figures that are either monochrome or RGB and are of different sizes. You want to display them in a single figure in MATLAB, with the ability to scroll from one image to another in the figure.

To achieve this, we will first load all the images in MATLAB and read them using the “dicomread” function. Next, we need to create a figure and display all the images using the “imshow” function. We can then create a slider by using the “uicontrol” function and add a custom listener to it to update the image while scrolling.

Here is the complete MATLAB code that accomplish this task:

% Load DICOM images 
fileNames = {'image1.dcm', 'image2.dcm', 'image3.dcm'}; 
numImages = length(fileNames); 
images = cell(1, numImages); 

for i = 1:numImages 
    images{i} = dicomread(fileNames{i}); 
end 

% Create the figure and UI controls 
hFig = figure('Name', 'DICOM Image Viewer', 'NumberTitle', 'off'); 
hAx = axes('Parent', hFig); 
hImg = imshow(images{1}, 'Parent', hAx); 

% Add a slider 
hSlider = uicontrol('Style', 'slider', 'Min', 1, 'Max', numImages, ... 
    'Value', 1, 'SliderStep', [1/(numImages-1) , 10/(numImages-1)], ... 
    'Position', [100, 20, 300, 20]); 

% Add a listener to the slider 
addlistener(hSlider, 'ContinuousValueChange', @(src, event) updateImage(hImg, images, round(get(src, 'Value')))); 

% Callback function to update the image 
function updateImage(hImg, images, index) 
imshow(images{index}, 'Parent', get(hImg, 'Parent')); 
end 

Attaching the documentation of functions used for reference:

dicomread - www.mathworks.com/help/images/ref/dicomread.html

figure - https://www.mathworks.com/help/matlab/ref/figure.html

imshow - https://www.mathworks.com/help/images/ref/imshow.html

addlistener - https://www.mathworks.com/help/matlab/ref/handle.addlistener.html

I trust this information proved helpful.