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Converting images to a .tiff with specific DPI.

Some publications will request an image with a specific dots-per-inch, or DPI. You can do this conversion with ImageMagick:

convert -density 600 image1.png image1.tiff

With convert image1.png to image1.tiff with 600 DPI. More about the -density flag and options from the ImageMagick docs.

Then I checked the result with exiftool; the X Resolution and Y Resolution fields should have the DPI specified in the conversion.

More TIL on this topic – compression.

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