PPI represents the resolution (pixel density) of a digital image displayed on the screen. Since this value is related to the image size (total number of pixels), it also contributes to the quality of an image. If a digital image contains too few pixels, the photo will not be very detailed and it will appear pixelated. The higher the number of pixels in a digital image, the more detailed it is. The number of PPIs for a given screen size depends on the image size of the photo.
The confusion between these two terms is due, in large part, to the following reasons. First of all, although the term PPI refers to the resolution of a digital image on the screen, this value can also affect the quality of the final printed image. Then, some professional print shops require that the images have a certain DPI value before they are printed. In fact, they should be talking about PPI, not DPI, which further adds to the confusion.ĭPI is a unit used to determine the print size of an image on paper relative to its image size, that is, the total number of pixels horizontally and vertically. While some printing apps still use the DPI setting, others, more recent, have a setting to select the exact size (10x15cm, 8x30cm, or whatever) you want to print a photo at. For printing applications that use the term DPI to determine print size, increasing the DPI value reduces the size of the printed image, while decreasing this value enlarges the image. PPI and DPI are units used to describe the output resolution of an image displayed on a screen (PPI) or printed on a sheet of paper (DPI). If you divide the image size (total number of pixels in the digital image) by this output resolution, you can determine the size at which the image is displayed on the screen or printed.
Second, press on convert button What is the difference between ppi and dpi measurement units? PPI or pixels per inch meaning is the number of pixels contained in a one inch, or 2.54 cm, line of an image displayed on a computer screen.ĭPI is the number of printed dots contained on a one inch, or 2.54 cm, line of an image printed by a printer.
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