DPI (dots per inch) is a measurement of a printer resolution, though it is commonly applied, somewhat inappropriately, to monitors, scanners and even digital cameras.
The term speaks mainly for printers, the DPI specification indicates the number of dots per inch that the printer is capable of achieving to form text or graphics on the printed page. The higher the DPI, the more refined the text or image will appear. To save ink, a low DPI is often used for draft copies or routine paperwork.
Pixel on the other hand is the measurement of the digital camera. The higher the pixel measurement, the more detail and sharper the image. The more pixel captured, the larger the document size of the image.
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