Understanding Image Resolution
Image or video resolution is the detail that an image or video holds. A pixel (sometimes referred to as “dot”) is the smallest addressable element in a display image. Thousands, sometimes millions of pixels combine to form one image or video frame. The more pixels an image or video has, the more detail that is displayed and the sharper/clearer the image is. The most popular way of measuring image resolution is the pixel count. For example, 1080p HD has a resolution of 1920 pixels wide by 1080 pixels tall.
Another useful form of measurement for image resolution – specifically with LED video walls – is “pixel pitch” or “dot pitch”. Pixel pitch is defined as the distance, in millimeters, from the center of one pixel to the center of the pixel adjacent to it. The lower the distance, the higher the pixel density which translates to a higher image resolution in a given amount of space. For example, if the pixels are 4.8 mm apart from each other, then that screen’s pixel pitch is 4.8mm, written as p4.8.
Another important measurement related to image resolution is aspect ratio. An image aspect ratio is the ratio of pixel width to pixel height, written as pixel width: pixel height. For example, a 1920x1080p display is technically a 1920:1080 aspect ratio. However, we want to simplify 1920:1080, thus a 1920x1080p display is a 16:9 ratio. 16:9 ratios are today’s standard display ratio. You can learn everything you need to know about aspect ratios and video walls here.