Resolution is the overall measurement of image quality. It is expressed as the number of dots- or pixels-per-inch. It is possible for an image to have different horizontal and vertical resolutions. For example, images received from fax transmissions typically have resolutions of 200 by 100 pixels-per-inch. The more pixels-per-inch, the higher the resolution. Image quality increases in proportion with the resolution value. Therefore, the higher the resolution, the greater the image quality.