Determining the dots per inch (DPI) of a JPEG image is crucial for understanding its resolution and print quality. DPI measures the number of individual dots that make up an image within a linear inch, and it directly affects the image’s sharpness and clarity. Higher DPI values indicate a higher resolution and more detailed image, while lower DPI values result in a coarser, less detailed image.
Knowing how to check the DPI of a JPEG is essential for various reasons. Firstly, it helps ensure that images are suitable for their intended use. For instance, images intended for print require a higher DPI (typically 300 DPI or above) to maintain sharpness and prevent pixelation. Conversely, images displayed on screens can have a lower DPI (usually 72 DPI or 96 DPI) as the human eye is less sensitive to individual dots at typical viewing distances.