Dots per inch (DPI) is a measure of the printing resolution of an image. The term is used to describe the number of individual dots of ink that can be placed in a line within the span of 1 inch. The higher the DPI, the more ink dots there are, and the sharper the image will appear.
DPI is used to measure the resolution of both digital images and printed images. For digital images, DPI is a measure of the pixel density of an image, or the number of pixels per inch. For printed images, DPI is a measure of the dot density of an image, or the number of printing dots per inch.
The DPI of an image can be increased by increasing the number of pixels per inch (for digital images) or by increasing the number of printing dots per inch (for printed images). However, increasing the DPI of an image will also increase the file size of the image.
DPI is often confused with PPI (pixels per inch), which is a measure of the pixel density of a digital image. However, PPI is a measure of the number of pixels in an image, while DPI is a measure of the number of ink dots in a printed image.
DPI is an important factor to consider when printing images. The higher the DPI of an image, the sharper the image will appear. However, increasing the DPI of an image will also increase the file size of the image.
When printing images, it is important to use the correct DPI. If the DPI is too low, the image will appear pixelated. If the DPI is too high, the image will appear blurry. The best way to determine the correct DPI for an image is to print a test image at various DPIs and see which DPI produces the best results.