how to save an image in pdf format without blank space. i,e; size of pdf should be same as the size of the image

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Parveiz Lone
Parveiz Lone am 11 Mär. 2020
above comment ....saveas(gca, 'file.pdf');
could not help me
a=imread('lena.jpg');
imshow(a),title('lena');
then i need to save image 'a' as pdf, but size of pdf should be same as size of image.

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Parveiz Lone
Parveiz Lone am 25 Nov. 2021
%% This can work good
h=figure;
subplot(111),imshow(image_name),title('image');
set(h,'papersize',[5.1 3.2]);
print(h,'image_name','-dpdf')

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Ameer Hamza
Ameer Hamza am 10 Mär. 2020
Although Friedrich's answer here: https://www.mathworks.com/matlabcentral/answers/12987-how-to-save-a-matlab-graphic-in-a-right-size-pdf#answer_17755 provides a clean solution, It still leave some extra white spaces.
I personally prefer to print the file to eps format. It leaves absolutely no extra space
print(gcf, 'filename', '-depsc')
And then export the eps file to pdf using epstopdf (command-line tool available with the installation of latex). If you don't have epstopdf installed, you can use this link: https://www.zamzar.com/convert/eps-to-pdf/ to convert the files to pdf.
The following image shows the difference between both methods. First is according to Friedrich's answer, second, when it is created using the above method.

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