Visualfilter for Experiments in Learning
Most photographers who've used a variety of different camera formats
are familiar with the upside-down, and backwards coordinate transformations.
After spending much of the day under the heavy black cloth, looking at
the ground glass, one sees the real-world as upside-down. In fact, since
the image on the retina really is upside down, why not look at the world
And of course, I can see others as they see themselves in the mirror.
And then when I look in the mirror myself, I'd see a non-reversed version
of myself. Learning to read this way takes more time, I find, than upside-down
reading, probably because I've used a view camera for many years, and not
done too much medium-format (2.25 inch) work, where the cameras present
things backwards. I can read upside-down almost as fast as rightside-up,
but my backwards reading is a little slow.
A sideways world is kind of fun too, but I get tired of the simple
"deflection-yoke" coordinate transformations.
Visualfilter for Experiments in Understanding Visual Handicaps
The visual filter also makes it possible to synthesize (and therefore
better understand) various problems encounted by the visually
handicapped. For example, running live video through a blurring kernel makes
it immediately obvious that many of the signs and other writing are
hard to read, while it is still possible to find my way into my office.
Walking around for a day with such a blurring kernel makes it very
easy to identify the sorts of problems encounted by someone suffering
from this kind of impairment.
The visual filter can also easily synthesize other visual
defficiencies like the inability to see well in the dark,
or the inability to see well in bright light.
You can also live in a negated world, (as though everything is
a photographic negative), by computationlly negating the video,
or by building a video negation system.