Image resolution refers to the number of pixels in an image. The resolution of an image is typically measured in pixels per inch (PPI) or dots per inch (DPI). Higher image resolution means that there are more pixels per inch, which results in a clearer, sharper image.
For example, an image with a resolution of 72dpi may appear blurry or pixelated when printed, while an image with a resolution of 300dpi will be much sharper and more detailed. Most printing applications require images to have a minimum resolution of 300dpi to ensure good print quality.
In general, it's important to use high-resolution images when creating designs for print, as low-resolution images may appear blurry or pixelated when printed. You can check the resolution of an image by looking at its properties or metadata. Most image editing software also has tools for resizing and adjusting image resolution.
Take the example below. The image of the text on the left-hand side is saved at 300dpi and the text on the right is saved at 72dpi. Both images are scaled to the same height and width. As you can see, the left-hand image is much clearer whilst the image on the right is pixelated.
|Image saved at 300dpi
|Image saved at 72dpi