Digital & Data

DPI와 PPI

정의

DPI(인치당 도트 수)는 인쇄 출력 해상도를, PPI(인치당 픽셀 수)는 화면 디스플레이 해상도를 측정하며, 둘 다 이미지 요소의 공간 밀도를 나타낸다.

설명

Print at 300 DPI is considered photo quality; newspaper print runs at 85–150 DPI. Apple coined 'Retina display' for screens above ~300 PPI, where individual pixels become imperceptible at normal viewing distance. The iPhone 15 Pro screen is 460 PPI. Confusingly, 'DPI' is widely misused to mean PPI in software settings—they are conceptually distinct but numerically interchangeable in digital-to-print workflows.

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