PPI

Last updated Jul 21, 2023

PPI = Pixel per inch(每英寸像素), 1 inch = 2.54 cm

$PPI = \frac{d_p}{d_i} = \frac{\sqrt{w^2+h^2}}{d_i}$

• $d_p$ = 对角线像素
• $d_i$ = 对角线长度(英寸)