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What is a Stereogram?
A stereogram is a picture, which becomes three-dimensional,
if you look at it in a certain way.
I only explain how to make
some stereograms, because there are already many sites available on the
internet.
Stereo
Pairs top
Stereo pairs are two pictures arranged next to each other.
They give you two similar sights of an object as both human eyes do.
Making of them:
Draw two cubes side by side in
perspective. Find the edges of the left cube by going 2 square sides to
the right and 2 squares upwards from a corner of the front square. Go 3
to the right and 2 upwards for drawing the right cube.
Look at the left cube with the left eye and at the right
cube with the right eye and then "through" the picture. Then the 3D-image
of a cube appears in the center. The cubes outside become blurred.
I suggest to develop the pictures
further. In addition you connect alternatively the cube corners, the centre
point of an edge or centre point of a square. Nice pictures develop in
spite of this primitive method.
Here are two more stereograms of this type. They were
drawn with Pbrush and stored as the type "monochrome bit-map", so that
the yellow squares disappear.
Developped further:
Unbelievable: The 3D-Effekt also occurs in freehand drawings
on graph paper.
The following picture arise
from repeating the cubes outside.
The two right and the two left pairs are seen as plain
pictures. Therefore the two ghost images are moved outward and don't disturb
the 3D picture in the centre. (Hint by Helmut Bichler)
You also can draw the two
images in the clolours red/green and can seperate them while looking at
with red-green-eyeglasses.
... ... |
You also can use a "wall" to seperate the images.
Then you need a binocular loupe because of the sharpness.
STEREOPTICS - Set of 18 stereooptics, 3D computer drawings
© 1981 ERTHings corp. |
Stereo
Wallpapers
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If you repeat a letter (or word)
in a line for the same distances and change the distances in other lines,
then a depth effect surprisingly appears. The larger the distance between
the characters (words), the further back they will appear.
Small effort, large effect:
You can produce both stereograms with the simple editor,
that belongs to Windows. Each character takes the same space as with mechanical
typewriters in former times.
Text from old days
Autostereograms
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In the 1990's autostereograms became popular. Surprisingly
only one picture is needed to give a 3D impression. In principle
an autostereogram is a combination of stereo pair and stereo wallpaper.
You need the depth map (julia.bmp) in grey colours and
the coloured texture (marmor.bmp) for an autostereogram. They are "joined"
with the help of the program.
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You recognize the word "Julia" floating over a plain background
with the stereo view.
HANNAH
Paul (made with StereoMaker)
Greta (made with easystereogrambuilder, URL below)
More on my German web pages Stereobildpaare
zeichnen and Körper aus 24 Magneten.
Stereograms
on the Internet
top
German
Wilfried Wittkowsky
Der
3D-Film
Fabian Januszewski
stereogramm
howto
Johannes Schmid
Stereogramme
Jürgen Giesen
Stereogramme
Schweizerische Gesellschaft für Stereoskopie
Stereoscopie
Ulrich Schwebinghaus
Kunst
& 3D
Wikipedia
Stereogramm
English
Bob Walter
Stereographic
Animations
Catos Interactive
Build
your own stereograms
Gareth and Peter's SIRDS pages
Sirds
Wikipedia
Stereogram
References top
Tom Baccei: Das magische Auge, München 1994
arsEdition: Stereogramm, CH-6301 Zug 1994
Thomas Ditzinger: Illusionen des Sehens, SÜDWEST,
München 1998
Feedback: Email address on my main page
This
page is also available in German.
URL of
my Homepage:
https://www.mathematische-basteleien.de/
©
Jürgen Köller
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