How is the ppi of digital camera calculated? Is ppi as high as possible?

PPI=√(X？ +Y？ ) /Z, the higher the ppi, the better.

PPI is the abbreviation of Pixels Per Inch, which means pixels per inch in Chinese, and it is also mentioned in screen parameters and printing parameters. The higher the PPI value, the higher the density of the display screen. Theoretically, the higher the screen PPI, the finer the screen and the better the picture quality.

PPI determines the quality of mobile phone screen, which depends on three factors: mobile phone screen panel, screen resolution and PPI. The higher the PPI value, the richer the picture details will be. The calculation formula of PPI is PPI=√(X? +Y？ ) /Z (X: number of pixels in length; Y: the number of pixels in the width; Z: screen size).

Extended data:

Common ones are 72ppi, 180ppi, 300ppi, which is all by default (A7 10 beat 180ppi, personally, this parameter seems to have little influence, so no one usually mentions it). ?

Dpi (dots per inch) refers to the output resolution. In terms of output equipment, the output resolution of a general laser printer is 300-600 dpi, while that of a printing imagesetter is 1200-2400 dpi, and that of ordinary printing is generally between 150 dpi-300 dpi.

The output resolution of a general laser printer is 300-600 dpi, and that of a printing imagesetter is1200 dpi-2,400 dpi, and that of ordinary printing is generally between 150 dpi-300 dpi.

Baidu encyclopedia -PPI