How to rate the new glasses-free experience : subjective quality assessment methodologies for experiments on light field displays

Novel forms of 3D visualization are rising, where users no longer need to rely on additional equipment, such as special glasses or head gears, in order to properly perceive the visualized content. One particularly notable type of these systems are light field displays. User experience on such glasses-free displays is just as important as on any visualization technology, and thus researchers conduct experiments to evaluate it. While there are standardized techniques for conventional 2D and stereoscopic 3D displays, at the time of this paper, there are no standards for measuring the user’s Quality of Experience on these displays. In this paper, we discuss the current state of experimental methodologies used to assess subjective perceived quality on light field displays. The discussion also calls attention to the special considerations which are typical for such 3D visualizations but not present in different systems. Keywords—Quality of Experience; Light Field Display; Perceived quality; Subjective quality assessment methodologies; Experimental test conditions; Subjective rating scales; Viewing distance; Parallax effect