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Image Size and Resolution for Printing

Image Size and Resolution for Printing

Your image’s resolution is measured in Pixels per Inch (PPI). You can determine the size of your printed image by dividing the number of pixels by the pixels per inch. The higher the image’s resolution, the smaller the image is when printed. So, for example, an image that is 200 pixels high and 400 pixels wide and that has a resolution of 100 PPI prints at 2 inches high and 4 inches wide. An image with the same dimensions but a resolution of 200 PPI prints at 1 inch high and 2 inches wide.

Inkjet and laser printers print images by applying dots of ink on paper. A printer’s resolution is therefore measured in Dots per Inch (DPI). It takes more than a single dot to produce a particular printed color, so DPI is not equivalent to PPI. You can see, then, that the appropriate image resolution for a printer is not the printer’s resolution. Table D.1 displays a few recommended image resolution ranges for particular printer resolutions.


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