From: Gina Miller (nanogirl@halcyon.com)
Date: Tue Oct 29 2002 - 22:25:23 MST
I did the same. I clicked the foreground color then the background color in
each square. When I double clicked either one they both came up color
6B6B6B. They are the same color. Indeed the shadow coming from the cylinder
has a darker overlay in the middle squares. (It is the shadow that is
causing the illusion) If you click the square that is just peeking out from
the cylinder (closest to the cylinder) in a triangle shape, it is the
darkest white square, even darker than B.
Gina
>
> I did ya one better and used the eye-dropper tool on each square and
> then looked at the color values which are indeed identical.
>
> Info on both squares:
>
> RGB: 107,107,107
> CMYK: 58,50,49,16
> HEX: 6B6B6B
>
> Squinting is a good way to normalize the input. I don't know why... it
> just seems to make them look closer to the same shade.
>
> -crw.
>
>
> On Tuesday, October 29, 2002, at 10:29 PM, ABlainey@aol.com wrote:
>
> > Eliezer S. Yudkowsky wrote:
> > > This is the most persistent optical illusion I have EVER encountered.
> > >
> > >
> > http://www.mayeticvillage.com/QuickPlace/project_green/Main.nsf/
> > h_Index/6A2397B6F1B3DCB1C1256C4000357CE8/$FILE/
> > image001.jpg?OpenElement&1033033489
> >
> > Amazing!
> > I copied the pic into photoshop and cut out the two squares and
> > put them side by side. I did find that if you put you hands, one
> > either side of the squares. Shuttering out the cylinder and the left
> > of the pic. The two squares do start to look different. this suggests
> > that the illusion is an artefact of the entire picture. or maybe i'm
> > just desperate to convince myself that the squares are different
> > shades :o)
> >
> > Alex
> >
>
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