Dots Per Square Inch.You have potentially heard this term many times before particularly in the context of printing your digital pictures.
DPI is frequently used as a measure of digital photo printing quality while the reality is that DPI is an indicator of the printer quality.
DPI is a physical characteristic of a printer. Each printer prints dots that when put next to one another comprise a photograph.
DPI is the maximum resolution a printer is capable of. DPI is outlined as the amount of dots a printer can print per inch. When printing it is critical to be sure the DPI is higher or equivalent to the amount of pixels per in. in the source photograph. If the DPI is lower the printer may not be ready to absolutely show the high-res photograph.
When the DPI is higher the printer will use multiple dots to represent one photograph pixel. DPI is a fixed number for a given printer.