Re: [PIC] txt stereo gram

"MichaelLowe" <mic...@chimail.freeserve.co.uk> wrote in message
news:aprfcb$i9i$1...@news6.svr.pol.co.uk...
>
> "Tom Bampton" <mol...@yahoo.com> wrote in message
> news:appopn$gv6$1$830...@news.demon.co.uk...
> >
> > "MichaelLowe" <mic...@chimail.freeserve.co.uk> wrote in message
> > news:appjdk$pfl$1...@news7.svr.pol.co.uk...
> >
> > > It is very difficult to represent the 3d ascii pictures because normally
> > > when something is close to you it appears larger. In stereo-grams the
> closer
> > > things become smaller! (very slightly). But they still seem closer!
> >
> > Hah, I discovered that after a few minutes messing abnout with it ;-)
> >
>
> Actually I have no idea why that happens. Maybe there are some scientist out
> there who understand it?

The way the eye works is complex ... if you have two eyes, the left eye and
right eye do not look at the same thing. They're slightly to the side of each
other and the brain puts the two images together to make something 3D. With
time, the brain can compensate and with one eye you can see pseudo-3D, that is
you can judge depth as well as you could with 2 eyes. That's my limited
understanding of it anyway, but trying to replicate that effect in a paint
program is pretty damn difficult as I've been finding out :)

> <SNIP>
> > On the flip side, how do you explain to someone who can see what it's like
> to be
> > blind ? Most normally sighted people cannot comprehend it. I have been
> blind in
>
>
> You are right. it is very difficult to understand. I think that if I became
> blind i would have to change quite abit. Maybe my ways of interacting with
> others would have to change - and maybe I would have to become more aware.

As soon as you lose sight, your other senses become much much better then they
were previously. Your hearing improves immensely, and your 6th sense does too.
It's weird and hard to explain. The humain brain adepts extremely quickly to
circumstances, and most of that adapting you're not even aware of. So, really,
it's not a case of "have to become more aware," it just happens and you realise
it has after the fact. Try walking around your house and doing the things you
usually do with your eyes shut (or blindfolded, which is easier) ... you'll find
you dont actually need to see, because where everything is is so imprinted on
your brain you can do anything from making a cup of tea to taking a leak without
the need of vision. If you're taken out of that environment, e.g. you go to a
shop, it becomes much much harder because the locations of things are not
imprinted in your mind and thus you have trouble, and probably need someone to
help you.

> I guess that being blind in one eye it is something you have thought about
> alot and understand well?

Yeh, I think about it quite a lot. Like the 3D thing I said above. I have no
trouble judging depth or distance, and as far as I'm concerned I can see in 3D.
Of course, no normally sighted person or doctor will agree with me on that one
since it's not real 3D. I suppose you can think of it in terms of a 3D computer
game. The depth in that is just an illusion based on colours on the screen,
likewise light and shadow give my vision depth.

The part most sighted people have problems understanding is when you're blind,
you can't see *ANYTHING*. It's absolutely nothing like shutting your eyes,
because when you do that you are seeing black, which if you're blind you can't
even see that. It's very very difficult to comprehend unless you've been there.

> > 3, and thus have never seen nor ever will see what a stereogram looks like
> for
> > real. Which means all I have to go on is what people tell me, and like you
> say
> > explaining that is very difficult.
> >
>
> It is the distances that the identical characters are spaced apart which
> determines how far or close the characters will apear when viewed
> stereo-scopically. The closer together they are horizontally, the nearer
> they project stereo-scopically. The further apart horozontally, the further
> back they appear. Somehow the brain is able to capture all of this

Aha! that makes sense now.

> information simultaneously (There are limits to the range of variation in
> depth which can be viewed simultaneously though) - to create a very vivid,
> multi-layered image. The characters in the for-ground, and those in the
> background, have the same degree of detail. Somehow they all appear more
> vivid.

One thing I noticed with messing around with the streogram was when two
characters overlap, it makes them more bold. The background chars are lighter
which gives the sense of depth. It's probably something like that that gives the
vividness. I am usually really good at visualisation, but this is giving me a
headache because the image is so complex it's hard for me to visualise how it's
supposed to be.

> > It also hurts my eye heheh. I was very very shocked when I saw it sort of
> work.
>
> Does it get tiring having to see things through one eye? Or have you got
> used to it?

I'm used to it. I've been this way for over 20 years. Sometimes my eye gets
tired. When I was at school I was known to type entire reports on the computer
with my eyes shut, including formatting and everything, mostly because sometimes
staring at a computer screen hurts. Tho, for some reason certain pictures makes
my eyes water like hell. They sort of draw you into them and your brain is
arguing with what you see and it just makes your head spin. I have a few
pictures I made a while back like that, as well as that "stereogram" when I was
messing around with the resize part.


T.

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