T3D Re: acuity enhanced with binocular vision

[Jim Crowell <crowell@xxxxxxxxxxxxxxx>]

At 3:09 PM -0800 3/18/98, John W Roberts wrote:
>
>>The thing you'd really want to worry about would be that
>>the display effects be equivalent between monocular & binocular conditions,
>>i.e. what exactly did they do to create the monocular images (replace the
>>target in one eye--e.g. on alternate frames--with a uniform background,
>>maybe?), & could it have affected the display quality in those conditions
>>relative to the binocular conditions...
>
>Agree. One of the problems is that people who are not specifically involved
>in display issues have a tendency to think of displays and display measurement
>techniques as being "perfect". As a possible example, the reference includes
>a comment on contrast levels of 30% - it's important to know whether that
>level was set just by the RGB levels sent to the graphics controller, or
>whether it was actually measured, and if so how the measurement was performed.
>

That one is almost certainly measured.  I think just about everyone in the
field is aware of the need to calibrate (& gamma-correct) their displays.
I think far fewer people are aware of things like adjacent-pixel
nonlinearities (i.e. the fact that the brightness of one pixel depends on
the brightness of the preceding pixel), however, so as you said one would
want to worry about calibration with small features...

-Jim C.


----------------------
Jim Crowell
Caltech Division of Biology
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