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What Does PPI Mean When Talking About Photography?

When talking about photography the acronym ‘PPI’ stands for ‘pixles per inch’ and refers to resolution of a printed image. Printers measure printing resolution in ‘DPI’ or ‘dots pre inch’ and it is important to understand the difference between PPI and DPI if you wish to print high quality images. If you print an image with PPI which is less than the DPI of the printer then you may notice a loss of sharpness in the final print. This occurs because the printer will have to render each pixel with more than one dot, making each pixel appear larger on the final print.

A nice sharp print!
Photo: Dan Carr