| The Influence of Depth of Focus on Visibility of Monocular Head-Mounted Display Symbology in Simulation and Training Applications |
FEB 2007 |
12 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Christine Covas; Jennifer Winner; LINK SIMULATION AND TRAINING MESA AZ
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 | The Joint Helmet Mounted Cueing System (JHMCS) is being considered for integration into the F-15, F-16, and F-18 aircraft. If this integration occurs, similar monocular head-mounted displays (HMDs) will need to be integrated with existing out-the-window simulator systems for training purposes. One such system is the Mobile Modular Display for Advanced Research and Training (M2DART), which is constructed with flat-panel rear-projection screens around a nominal eye-point. Because the panels are ... |
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| Depth of Focus and Perceived Blurring of Simultaneously-Viewed Displays |
FEB 2007 |
12 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Christine Covas; Jennifer Winner; LINK SIMULATION AND TRAINING MESA AZ
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| Head-mounted displays (HMDs) have not previously been combined with flat-panel display systems and it was unknown whether viewing two displays at differing focal plane distances would lead to perceived blurring or visual discomfort. This is now a concern as the Joint Helmet Mounted Cueing System (JHMCS) is integrated with existing flat-panel display systems such as the Mobile Modular Display for Advanced Research and Training (M2DART). The degree of blurring that ... |
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| Binocular Rivalry and Attention in Helmet-Mounted Display Applications |
FEB 2007 |
8 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Christin Covas; Jason Rogers; LINK SIMULATION AND TRAINING MESA AZ
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| As monocular head-mounted displays (HMDs) are introduced into existing flight simulators for training and mission rehearsal it will be important to determine whether binocular rivalry affects the visibility of HMD presented symbology or the out-the-window (OTW) flight simulator display imagery. In the present study, we examined whether rivalry suppression could be objectively measured under conditions that simulated a monocular HMD and OTW display, and whether voluntary attention and moving imagery ... |
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| Brightness and Spatial Resolution of a Prototype, Green-Laser Projector Measured for Various Display Screens and Image Sizes |
DEC 2006 |
11 pages |
| Authors:
George A. Geri; Marc D. Winterbottom; LINK SIMULATION AND TRAINING MESA AZ
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| Laser light has many unique characteristics, such as coherence and speckle, and in addition, the individual pixels formed by the raster structure of a laser projector have very little persistence. As a result, there is some question as to whether the luminance of laser-projector imagery can be measured accurately, and whether that imagery will appear the same as more conventional imagery of the same luminance. In a preliminary attempt to ... |
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| The Variability of Spatial Resolution Estimates Obtained Using a CCD Camera |
DEC 2006 |
11 pages |
| Authors:
George A. Geri; Kristin J. Caufield; Marc D. Winterbottom; LINK SIMULATION AND TRAINING MESA AZ
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| We have previously developed techniques for measuring the spatial resolution of flight simulator displays. In the present experiment, we estimate the relative variability of the measurement technique and the display projectors they were designed to assess. We use the ratio of the standard deviation and mean of the resolution estimates as a measure of variability. Variability was found to be about 1.3% for grating transparencies illuminated by a stable light ... |
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| Perceptual Tests of the Temporal Properties of a Shuttered LCD Projector |
AUG 2006 |
7 pages |
| Authors:
Marc D. Winterbottom; George A. Geri; Bill Morgan; Craig Eidman; Jim Gaska; Byron Pierce; LINK SIMULATION AND TRAINING MESA AZ
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| Perceptual motion blur was studied in imagery presented on an LCD projector equipped with a mechanical shutter to reduce pixel hold-time. Perceptual measures of image blur were obtained with both a simple test stimulus, as well as real-world imagery. Both were found to correlate well with the measured pixel hold-time. |
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| Visual Suppression of Monocularly Presented Symbology Against a Fused Background in a Simulation and Training Environment |
AUG 2006 |
13 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Amanda Taylor; AIR FORCE RESEARCH LAB MESA AZ
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| When wearing a monocular head-mounted display (HMD), one eye views the HMD symbology while both eyes view an out-the-window scene. This may create interocular differences in image characteristics that could disrupt binocular vision by provoking visual suppression, thus reducing visibility of the background scene, monocular symbology, or both. However, binocular fusion of the background scene may mitigate against the occurrence of visual suppression, a hypothesis that was investigated in the ... |
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| Perceptual Issues in the Use of Head-Mounted Visual Displays |
2006 |
22 pages |
| Authors:
Robert Patterson; Marc D. Winterbottom; Byron J. Pierce; WASHINGTON STATE UNIV PULLMAN DEPT OF PSYCHOLOGY
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| We provide a review and analysis of much of the published literature on visual perception issues that impact the design and use of head-mounted displays (HMDs). Unlike the previous literature on HMDs, this review draws heavily from the basic vision literature in order to help provide insight for future design solutions for HMDs. Included in this review are articles and books found cited in other works as well as articles ... |
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| Helmet-Mounted Displays for Use in Air Force Training and Simulation |
NOV 2005 |
62 pages |
| Authors:
Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; AIR FORCE RESEARCH LAB MESA AZ HUMAN EFFECTIVENESS DIRECTORATE
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| This report provides a review and analysis of the published literature on head-mounted displays (HMDs). In particular, we discuss several key perceptual issues that are relevant to the use of HMDs. The issues discussed are: (1) brightness and contrast; (2) accommodationvergence synergy; (3) field of view; (4) binocular input; and (5) head movements. This review of the literature is intended to anticipate and solve perceptual issues associated with two particular ... |
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| Effect of Display Resolution and Antialiasing on the Discrimination of Simulated-Aircraft Orientation |
2005 |
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| Authors:
George A. Geri; Marc D. Winterbottom; LINK SIMULATION AND TRAINING MESA AZ
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 | In Experiment 1, antialiasing was found to improve performance on an orientation-discrimination task, whereas increasing display pixel-count did not. The latter finding was attributed to a decrease in image contrast associated with driving the CRT beyond its effective bandwidth. In Experiment 2, it was found that display resolution is the primary determinant of orientation-discrimination performance. This performance was not significantly improved by increasing antialiasing beyond a minimal level, suggesting that ... |
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