Stereo photo

Stereo photo

part 3

Stereo-photo can show the hidden sructure

At first, look each image separately. It may be difficult to recognize the letters. Then, see with stereo viewing. It is much easier to read the letter, isn`t it?
cross view

parallel view

And another image.
cross view

parallel view

You may recognize the vertex of the pyramid. Though, the vertex was not drawn in any of the pictures.

We can recognize occulded objects by stereo-viewing. I have learned about these phenomena in "Adventure of Vision, From Illusions to Science" by Shinsuke SHIMOJO 1995 (P61乣; written in Japanese)
Castle tower was hidden by many trees, therefor it is hard to see it.

Then see with stereo-viewing.
cross view

parallel view

Well, do you recognize the shape of castle tower?

go to part 4
return