04-11-2018, 02:05 PM
A digital image only has size in pixels. It does not have a resolution in dpi. The dpi is just a dormant value stored in the image and is only used when printing.
For example, if an image is 900 x 900 pixels and the dormant resolution is 300 dpi, then the print size will be 3" x 3" (900/300 = 3).
In Gimp you can set the dpi using Image > Print Size. But this will only change the indication of the print size, the image itself does not change at all.
If there is no dpi set in an image then the software opening the image will assume some value. But again, this does not affect the image itself. The image size in pixels remains unchanged.
For example, if an image is 900 x 900 pixels and the dormant resolution is 300 dpi, then the print size will be 3" x 3" (900/300 = 3).
In Gimp you can set the dpi using Image > Print Size. But this will only change the indication of the print size, the image itself does not change at all.
If there is no dpi set in an image then the software opening the image will assume some value. But again, this does not affect the image itself. The image size in pixels remains unchanged.