HD is a scanning mode powered by artificial intelligence algorithms that allows you to create sharper, cleaner, and far more detailed 3D models with a resolution 2X higher than the original SD data. In HD Mode, a resolution of up to 0.2 mm can be achieved, and your Eva can capture much smaller and thinner elements, hard-to-reach areas, black and shiny surfaces and other parts that were difficult or impossible to capture before. HD Mode is available for Leo and Eva scanners running Artec Studio 15.1 or higher.
Visit here for more information about HD Mode.