Dots per inch, or DPI, is a measure of the resolution of a digital imaging device, such as a computer monitor, scanner, or printer. It indicates how many individual dots of ink, light, or pixels are placed within a one-inch line. The higher the DPI, the greater the potential image detail and quality-provided the source image is sharp.
For reference, typical computer monitor resolutions are around 72 DPI on a Mac and 96 DPI on a PC. Entry-level digital printers usually print at about 600 DPI, while professional photo-quality printers can reach 1200 DPI or higher. Scanners offer a wide range of DPI, from 300 for general use up to 4000 for high-resolution image capture. Understanding DPI helps photographers and designers ensure that digital images maintain clarity and sharpness when viewed on screens or printed.