Measuring 3D point of gaze while wearing Nvidia 3D Vision glasses

What is it about?

Inappropriate parallax setting in stereoscopic content generally causes visual fatigue and visual discomfort. To optimize three dimensional (3D) effects in stereoscopic content by taking into account health issue, understanding how user gazes at 3D direction in virtual space is currently an important research topic. In this paper, we report the study of developing a novel 3D gaze tracking system for Nvidia 3D Vision® to be used in desktop stereoscopic display. We suggest an optimized geometric method to accurately measure the position of virtual 3D object. Our experimental result shows that the proposed system achieved better accuracy compared to conventional geometric method by average errors 0.83 cm, 0.87 cm, and 1.06 cm in X, Y, and Z dimensions, respectively.

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Why is it important?

Our approach is useful for researchers of human-computer interaction field, particularly whom working in virtual reality and gaze-based interaction. Nowadays, VR is going to be more realistic since the 3D content is presented with foveated rendering. For example, Nvidia recently developed a method to render with high resolution only a specific location where the user looks at, while the other parts of the scene were rendered with lower resolution. This foveated rendering technology--hi-res rendering a specific location where the user gazes at--is mainly based on gaze tracking technology. Unfortunately, accurate estimation of the 3D point of gaze is needed to associate what the user look at with the true location where the user looks at. Our method can be used as an alternative approach to validate the 3D gaze tracking system in VR.