How to change resolution of an image ?

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ABTJ
ABTJ 2020-4-28
回答： Charu 2025-1-23，11:46
What is the command/keyword for changing resolution(ppi) of image in matlab? How we can use that command? Please kindly give an example
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Image Analyst
Image Analyst 2020-4-28
You mean like if you printed it to paper or a PDF?
ABTJ
ABTJ 2020-4-29
please check the updated question, I have edited, it was pixels per inch , my intention wasn't dpi

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Charu
Charu 2025-1-23，11:46
To change the resolution of an image in MATLAB, you can specify the pixels per inch (PPI) when saving the image in formats that support this feature, such as TIFF. This can be done using the imwrite function with the Resolution parameter provided by the Image Processing Toolbox. For example, in MATLAB R2024b, you can set the resolution as follows:
imwrite(imageData, 'outputimage.tiff', 'Resolution', [300, 300]);
Refer to this link of official documentation for further information.
https://www.mathworks.com/help/releases/R2024b/matlab/ref/imwrite.html

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