DPI indicates the resolution of images, The more dots per inch, the higher the resolution.
A common resolution for laser printers is 600 dots per inch.
This means 600 dots across and 600 dots down, so there are 3,60,000 dots per square inch.
Monitors do not have dots, but do have pixels.
The closely related concept for monitors and images is Pixels Per Inch or PPI.
In printing, DPI refers to the output resolution of a printer or image setter, and PPI refers to the input resolution of a photograph or image.
- A 10*10 - pixel image on a computer display usually requires many more than 10*10 printer dots to accurately reproduce, due to limitations of available ink colors in the printer; here a 60*60 grid is used, providing 36x the original density, compensating for the printer's lower color depth.
- The Whole blue pixels making up the sphere are reproduced by the printer using different overlaid combinations of cyan,magenta and black ink and the light aqua by cyan and yellow with some "white"(ink-free) print pixels within the actual image pixel.
- When viewed at a more normal distance, the primary colored stippled dots appear to merge into a smoother, more richly colored image.
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