A Gaze-Reactive Display for Simulating Depth-of-Field of Eyes When Viewing Scenes with Multiple Depths

Tatsuro ORIKASA  Takayuki OKATANI  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E99-D   No.3   pp.739-746
Publication Date: 2016/03/01
Publicized: 2015/11/30
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2015EDP7110
Type of Manuscript: PAPER
Category: Computer Graphics
Keyword: 
depth of field,  eye tracker,  stereoscopic display,  

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Summary: 
The the depth-of-field limitation of our eyes causes out-of-focus blur in the retinal images. The blur dynamically changes whenever we change our gaze and accordingly the scene point we are looking at changes its depth. This paper proposes an image display that reproduces retinal out-of-focus blur by using a stereoscopic display and eye trackers. Its purpose is to provide the viewer with more realistic visual experiences than conventional (stereoscopic) displays. Unlike previous similar systems that track only one of the viewer's eyes to estimate the gaze depth, the proposed system tracks both eyes individually using two eye trackers and estimates the gaze depth from the convergence angle calculated by triangulation. This provides several advantages over existing schemes, such as being able to deal with scenes having multiple depths. We describe detailed implementations of the proposed system and show the results of an experiment conducted to examine its effectiveness. In the experiment, creating a scene having two depths using two LCD displays together with a half mirror, we examined how difficult it is for viewers to distinguish between the real scene and its virtual reproduction created by the proposed display system. The results of the experiment show the effectiveness of the proposed approach.