How do I save an image at a specific resolution?

My MatLab knowledge is terrible. I have made some figures. I want to save them at a very high resolution as a .tiff. How can I do this? I have tried using the

imwrite 
print -r

functions, but this doesn't seem to work.

Answer 1

[Image Analyst]

Do you want to save only the image, as an image? Or do you want to save the figure as an image? If it's just the image, that you may have displayed with imshow(), image(), or imagesc(), then you can use imwrite().

If you want to save the figure, because you have annotation (arrows, text, lines, polygons) in the overlay above the image, or you want to show axes tick marks and toolbars, then you can use saveas(). Or better than saveas() is export_fig(). See this page to download export_fig: http://www.mathworks.com/matlabcentral/fileexchange/

[Joshua]

saveas() looks close to what I want. I create a figure with specific major and minor grid lines and a 3D image and want to save it at a high resolution for publication. I create my image, then run the code

print -r1500 % set resolution
saveas(figure(1),'test.tif') % save image as a .tiff file

Changing '-r1500' does not alter the resolution. I feel like what I am trying to do is very simple and that I am making some stupid mistake.

[Joshua]

just got it to work with

print('-dtiff','-r500',fnames)

where -dtiff is the .tiff file type, -r500 is the resolution of 500 dpi, and fnames is the saved files name.

Answer 2

[Walter Roberson]

See for example http://www.mathworks.co.uk/matlabcentral/answers/109642-write-compared-images-not-figures

Answer 3

[PAVITHRA A]

hi...i heed to get high resolution and low resolution of image from LBP processed image.how can I do this??can anybody help me...

Answer 4

[Palguna Gopireddy]

See this link.

https://in.mathworks.com/help/matlab/creating_plots/save-figure-at-specific-size-and-resolution.html