This Recommendation describes two main types of augmented reality (AR): face AR and space AR. Face AR refers to a service that superimposes the AR effect in and around the human face. Space AR refers to a service in which an AR effect is superimposed on a natural space, such as a table top, a wall surface, a common object, an indoor space or an outdoor open space.

In order to measure the quality of experience (QoE) that users perceive in face and space AR services, benchmarking is critical. Due to addition of new ways to locate the self-position of users and a new display mode of perceptual information, a set of new requirements for QoE assessment presents itself. The challenge is to characterize immersive video, spatial audio and interactivity of AR. It is also important to address the requirements and basic factors affecting virtual reality (VR) QoE before work is benchmarked. This Recommendation identifies the taxonomy of the two AR services and key factors affecting user-perceived experience.

This Recommendation includes:

– face and space AR service taxonomy and corresponding use cases;

– QoE-influencing factors for face and space AR services.

AR is an immersive experience of a real-world environment in which objects within it are "augmented" by computer-generated perceptual information, e.g., one or several visual, auditory, haptic, somatosensory and olfactory factors can be included. AR differs from VR, which aims to completely replace the user's real world environment with a simulated one; AR keeps the real world and adds information to the natural environment. The value of AR is to integrate immersive sensations into the natural environment, thus deepening perception when compared to actual reality. The first AR application systems were used for military training; subsequently, its functional scope has been expanded to gaming, education, navigation, etc.