How to save an image from imshow() as a .jpeg?

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fiona rozario
fiona rozario 2017-3-18
回答： Dariush Ashtiani 2018-10-3
I am creating an RGB image and displaying using imshow(). Once the image is displayed, if I save the image as .jpeg, it gets a white background to it and the image dimensions change. How can I keep it to its original dimensions? Attached image is what I got when I saved it as a .jpeg file and the dimensions are 240x170. Whereas the original dimensions of the constituting matrices are 100x100.

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Walter Roberson
Walter Roberson 2017-3-18
编辑：Walter Roberson 2017-3-18
Have a look at print(), which pays attention to the figure PaperPosition* properties and to the figure InvertHardcopy property. It also allows a -r resolution option.
However, I would instead recommend using imwrite of the rgb matrix.

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Dariush Ashtiani
Dariush Ashtiani 2018-10-3
You can use saveas commad. Say
filename='image1'; saveas(gcf,[filename,'.jpg'])

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