[opendtv] Re: Human Field of View; was Re: Re: Fwd: Expo 2005 (Sony GLV)
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Fri, 15 Jul 2005 08:23:52 -0400
This source seems to be out of sync with the literature.
A quick search reveals that most scientists put the monocular field
of vision for humans in the range of 140-160 degrees H and 120 - 135
degrees V.
All of this is largely a matter of conjecture and may vary between
human subjects.
What does not vary is the very limited field of view for high
resolution viewing. If the eyes are held in fixed position the high
resolution field of view is roughly circular and covers only a small
portion of the total viewing field.
To create a totally immersive viewing experience a screen needs to
cover both the foveal high resolution field, and the extra-foveal
receptors that support low resolution peripheral vision.
To do this you need a screen that covers at least 120 degrees
vertically and roughly 180 degrees horizontally.
Regards
Craig
At 5:19 PM +0000 7/14/05, cbenham@xxxxxxxxxxx wrote:
> >From "A Virtual Retinal Display For Augmenting Ambient Visual Environments
>
>by Michael Tidwell
>
>http://www.hitl.washington.edu/publications/tidwell/ch3.html
>
>3.2 Field of View
>The field of vision of a single static human eye is approximately
>140 [deg.] from the nasal to the temporal limits of vision [8]. The
>vertical field of vision is approximately 90 [deg.]. The highest
>resolution of the visual system occurs over a region only 2-4 [deg.]
>in extent. This region, called the fovea (also called the "focal"
>visual system), contains mostly cone receptors which are responsible
>for discerning detail and color in daylight vision. The remaining
>receptor area (sometimes called the "ambient" visual system)
>contains mostly rod receptors and detects motion and other spatial
>information. The rods cover a region from a few degrees off the axis
>of the eye to 70 [deg.] away from the axis. One might mistakenly
>assume that a display could be designed so that the center portion
>of the display is "high" resolution and so that the periphery is
>"lower" resolution. However, resolution in the peripheral field of
>view is necessary for accurate detection of motion [8] and t
> o control of saccadic eye movement. Some manufacturers offer
>displays with higher resolution inset areas and lower resolution
>backgrounds. The high resolution inset moves according to eye
>position. The registration of an inset with actual eye position can
>be difficult and the lower resolution periphery degrades the
>viewer's motion and visual search ability. The ideal display,
>however, allows for the fact that the eye rotates about its axis, or
>gimbals, as a person looks around a scene. In fact, the ideal
>display matches the resolution of the eye over the entire field of
>vision (i.e. one minute of arc resolution over a 140 [deg.]
>horizontal monocular field as shown previously).
>
><snip>
>
>A summary of system requirements for the ideal augmented vision
>display would be as follows (Table III.1):
>
>Table III.1. Performance characteristics for an ideal augmented
>vision display.
>
>Performance Characteristic
>
>Value
>Horizontal Monocular Field of View 140 [deg.]
>Vertical Monocular Field of View 90 [deg.]
>Horizontal Binocular Field of View 180 [deg.]
>Vertical Binocular Field of View 90 [deg.]
>Binocular Stereo Overlap 120 [deg.]
>Angular Resolution 1 [arc min.]
>Horizontal Pixel Elements (Monocular) 8400
>Vertical Pixel Elements (Monocular) 5400
>Estimated Retinal Illuminance 0 - 105 [trolands]
>Color:
>Red = 650 [nm]
>Green = 530 [nm]
>Blue = 460 [nm]
>Augmentation Variable from 0-100%
>
>
>
>
>
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