DPI stands for "dots per inch" and is a measure of the resolution of an image. It refers to the number of individual dots that can be placed in a line within the span of one inch. DPI is used to describe the resolution number of dots per inch in a digital print and the printing resolution of a hard copy print dot gain, which is the increase in the size of the halftone dots during printing. In printing, DPI refers to the output resolution of a printer or imagesetter, and PPI (pixels per inch) refers to the input resolution of a photograph or image.
In the context of computer mice, DPI refers to the sensitivity of a mouses sensor. A higher DPI means the cursor will move faster and cover more screen distance with less physical movement, while a lower DPI results in slower, more precise cursor movement.
Its important to note that DPI is often misused to mean PPI (pixels per inch), which is a measure of the number of pixels in an image.
