RostrioDots per inch (DPI) is a unit of measurement for the resolution of digital images. DPI refers to the number of dots that can be printed per inch on a paper. The term pixels per inch (ppi) is also used interchangeably with DPI. The higher the DPI, the more dots or pixels per inch, and the higher the resolution of the image.
In the printing industry, DPI represents the number of ink droplets that a printer can place in a square inch on a paper. A printer with a higher DPI can produce sharper and more detailed prints.
Rules for Dpi of a Passport Photo
When it comes to passport photos, the DPI requirement is usually set by the relevant government agency. A minimum resolution of 400 DPI is required for passport photos. High-quality, smooth photo paper must also be used to ensure that the image is sharp and clearness.
At our passport photo service, we use an official photo printer that meets high-quality standards to produce passport photos at 400 DPI on 300-gram photo paper. This ensures that the photos meet the DPI requirement and are of high quality.