how to export images to pdf

heloo

i need to export a lot of images to pdf file. i tried this solutions but it is bad.

for a=1:2
    h=subplot(2,1,a), imshow(absKoniec{a}) 
    %in absKoniec are more then 2 images(pages of book), this is only example
    kurnik = figure(1)
end
saveas(h,'hokus.pdf')
hgexport(kurnik, 'figure1.pdf', hgexport('factorystyle'), 'Format', 'pdf')

output is here:

images in pdf and in figure are too small(background is too big).so it is necessary to zoom in pdf. And how to do it, if i want to have one image on every single page of pdf (it is possible)? help me pls...

[Walter Roberson]

What did you set() the figure PageSize to be?

[Lukas]

do you thing this:

for a=1:30
    h=subplot(30,1,a), imshow(absKoniec{a})
    kurnik = figure(1)

end
%saveas(h,'hokus.pdf')
%hgexport(kurnik, 'figure1.pdf', hgexport('factorystyle'), 'Format', 'pdf')

%A = hgload('myFigure.fig');

% set desired output size
set(kurnik, 'Units','centimeters')
height = 15;
width = 4;

% the last two parameters of 'Position' define the figure size
set(kurnik, 'Position',[0 0 width height],...
       'PaperSize',[width height],...
       'PaperPositionMode','auto',...
       'InvertHardcopy', 'off',...
       'Renderer','painters'...     %recommended if there are no alphamaps
   );

%saveas(kurnik,'printout','pdf')
hgexport(kurnik, 'figure1.pdf', hgexport('factorystyle'), 'Format', 'pdf')

but if there(in figure) are many images, i need strong zoom to see images...

Answer 1

[Yash]

Hi Lukas,

As I can understand, you want a pdf with each page as a given image in the folder. Instead of using the "hgexport" function, you can use the "exportgraphics" function to get the pdf. Given below is an example for the same:

% Specify the number of images
numImages = 10;

% Initialize a cell array to store the image file names
imageFiles = cell(numImages, 1);
for i = 1:numImages
    imageFiles{i} = sprintf('image_%d.jpg', i); % Adjust the file extension if needed
end

% Create a new PDF
outputPDF = 'output.pdf';

% Create a figure for displaying images
hFig = figure('Visible', 'off');

% Loop over each image and add it to the PDF
for i = 1:numImages
    % Read the image
    img = imread(imageFiles{i});
    
    % Display the image
    imshow(img, 'Border', 'tight');
    
    % Adjust the figure size to fit the image
    truesize(hFig);
    
    % Save the current figure as a PDF page
    if i == 1
        % Use 'append' option to create a new PDF
        exportgraphics(hFig, outputPDF, 'Append', false, 'ContentType', 'vector');
    else
        % Append to the existing PDF
        exportgraphics(hFig, outputPDF, 'Append', true, 'ContentType', 'vector');
    end
end

% Close the figure
close(hFig);

Kindly refer to the following documentation for the "exportgraphics" function: https://www.mathworks.com/help/matlab/ref/exportgraphics.html

Relevant MATLAB Answer: https://www.mathworks.com/matlabcentral/answers/12987-how-to-save-a-matlab-graphic-in-a-right-size-pdf

I hope this helps!