do you see 3d depth? i dont | Forums

[raaaid]

do this easy experiment:

look to an object 1 m away from you and put your index finger in the middle 10cm from your eyes

[raaaid]

this is a floating 3d image from the magic eye, maybe you know it

you have to look far so you see it double as it is close then the circles overimpose

if the circles overimpose converging the rays from your eyes 2m away from you youll feel thats the distance of the circles

but in this case there are close circles(0.5cm distance) thatll make your eyes converge close with which the circles will appear close and circles that are 2 cm apart which will make your eyes converge farther giving the feeling of being farther

well as you have checked with the index experiments in which either you see double far or close this is totally different, you dont see double you have TRUE DEPTH

this have me clueless, maybe we should look with the rays of eyes totally parallel and let the brain build the 3d depth feeilng, hey maybe even somebody does, or even im an exception

[MEGILE]

I see double when focusing far, and single when focusing on the finger. Unsurprisingly I might add.

[major_setback]

Finger is double when focusing far.
Faris double when focusing on the finger.


This is how it should be - when the two eyes point at the finger they are pointing at differnt places in the distance...and the other way around.

I just got a slap for putting up my finger!

[raaaid]

yes thats what i had supposed, but how do you explain that magic eye image:

when you see the circles double to experience the 3d effect how can you overimpose the ones that are 2 cm apart and the ones that are 1 cm apart at the same time?

this should be imposible according the way sight works, but your brain some how over impose circles, even ones that are at more distance apart than others?

can anybody explain this or a hit into a mistery?

[major_setback]

They wont superimpose exactly, that's why some of the cirlces look double (just like your finger in the first example you gave). I think that the circles are spaced so that they match each other well when viewed the right way, even if they look randomly spaced..

Here's another magic eye, you should see an indentation (hollow) in the shape of a big heart if you view it correctly.

[Pirschjaeger]

Very cool. I've never seen that, although it did take sometime to make it work.

It makes your eyes cross just slightly to give the 3d effect.

Things to consider:

vision, at least 3 dimensional, is a triangulation.

your brain knows where your eyes are crossed, and not just by vision.

So I guess your brain percieves two triangulations and is simply jumping back and forth between the trangulations at a high rate.

After all, it is the triangulation that tells us the distance to an object.

To prove this, close one eye and reach for things. It's much easier to judge the distance with both eyes open. Look at the dots again and when you have the 3d effect, close one eye. Then it's 2d.

Fritz

[Pirschjaeger]

Major-S, I see four levels. Each one smaller as it gets deeper.

As much as I've never seen this stuff before. Finally, I know what everyone's talking about.

[major_setback]

Optical illusions are fun too. I came across this:



I have an aircraft skin made from an optical illusion like this.

[buzzsaw1939]

Hummgh!... all I'm getting is a headache!