PPI refers to the number of pixels (or picture elements) that are present in one inch of an image or a display. The higher the PPI, the more pixels are packed into each inch, resulting in a sharper and more detailed image. PPI is often used to describe the resolution of digital displays, such as computer monitors, smartphones, and tablets.
While PPI and DPI refer to different things, they are related in that the resolution of an image or a display can affect the print quality. For example, an image with a low PPI may look blurry or pixelated when printed at a high DPI, as the printer is unable to reproduce the detail that was not present in the original image. Similarly, an image with a high PPI may look sharper when printed at a high DPI, as the printer is able to reproduce more detail from the original image.
Here are some examples of common PPIs for different devices:
- Smartphones: Many modern smartphones have a PPI of around 300 or higher, which is considered Retina display quality. Some examples include the iPhone 11 with a PPI of 326, the Samsung Galaxy S21 with a PPI of 421, and the Google Pixel 5 with a PPI of 432.
- Tablets: Like smartphones, many modern tablets have a PPI of around 300 or higher. Examples include the iPad Air with a PPI of 264, the Samsung Galaxy Tab S7+ with a PPI of 274, and the Microsoft Surface Pro 7 with a PPI of 267.
- Laptops: The PPI of laptops varies depending on the size and resolution of the screen. For example, a 13-inch MacBook Pro has a PPI of 227, while a 15-inch MacBook Pro has a PPI of 220. Some high-end laptops may have PPIs of 300 or higher.
- Monitors: Monitors also vary widely in terms of PPI. A 24-inch 1080p monitor has a PPI of around 92, while a 27-inch 1440p monitor has a PPI of around 109. High-end monitors with 4K resolution may have PPIs of 163 or higher.
Overall, higher PPIs generally result in sharper and more detailed images, but they also require more processing power and can be more expensive to produce.
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