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Erwan Normand
2025-04-09 15:33:36 +02:00
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2-related-work/3-augmented-reality.tex
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@@ -62,11 +62,11 @@ To experience a virtual content combined and registered with the \RE, an output
%An output device is more formally defined as an output \emph{\UI}
There is a large variety of \AR displays with different methods of combining the real and virtual content, and different locations on the \RE or the user \cite[p.126]{billinghurst2015survey}.
In \emph{\VST-\AR}, the virtual images are superimposed to images of the \RE captured by a camera \cite{marchand2016pose}, and the combined real-virtual image is displayed on a screen to the user, as illustrated in \figref{itoh2022indistinguishable_vst}, \eg \figref{hartl2013mobile}.
In \emph{\VST-\AR}, the virtual images are superimposed to images of the \RE captured by a camera \cite{marchand2016pose}, and the combined real-virtual image is displayed on a screen to the user, as illustrated in \figref{itoh2022indistinguishable_vst}. An example is shown in \figref{hartl2013mobile}.
This augmented view through the camera has the advantage of a complete control on the real-virtual combination such as mutual occlusion between real and virtual objects \cite{macedo2023occlusion}, coherent lighting and no delay between the real and virtual images \cite{kruijff2010perceptual}.
But, due to the camera and the screen, the user's view is degraded with a lower resolution, frame rate, field of view, and an overall visual latency compared to proprioception \cite{kruijff2010perceptual}.
An \emph{\OST-\AR} directly combines the virtual images with the real world view using a transparent optical system \cite{itoh2022indistinguishable} to like augmented glasses, as illustrated in \figref{itoh2022indistinguishable_ost}, \eg \figref{lee2013spacetop}.
An \emph{\OST-\AR} display directly combines the virtual images with the real world view using a transparent optical system \cite{itoh2022indistinguishable} to be like augmented glasses, as illustrated in \figref{itoh2022indistinguishable_ost}. An example is shown in \figref{lee2013spacetop}.
These displays feature a direct, preserved view of the \RE at the cost of more difficult registration (spatial misalignment or temporal latency between the real and virtual content) \cite{grubert2018survey} and mutual real-virtual occlusion \cite{macedo2023occlusion}.
Finally, \emph{projection-based \AR} overlays the virtual images on the real world using a projector, as illustrated in \figref{roo2017one_2}, \eg \figref{roo2017inner}.