DPI full form Dots Per Inch, is a measure of the density of spatial painting, video, or image scanner, specifically the number of individual dots that can be placed in a line within a distance of 1 inch ( 2.54 cm). Learn the meaning and usage of DPI , a measurement of image density or resolution. Find out how DPI affects the quality of digital printing and touchscreen display. What does DPI stand for? DPI stands for Dots per Inch, referring to the number of ink droplets a printer will produce per inch while printing an image. The more dots of ink per inch the picture has, the more detail you will see when printed. What’s DPI used for? DPI has many full forms and refers to Dots Per Inch which determines the resolution of a picture or image and Digital Payment Index which allows digital transactions of money.