EuroCD 3/EuroCD 3.iso/Graphics_Utils/StereopJr/Guide/A05

Text File | 1998-06-24 | 1.7 KB | 34 lines

HOW STEREOP-JR WORKS

Close your right eye and hold your hand up in front of your face, about a
foot from your eyes.  If you didn't know it was your hand, it would be hard
to tell if it was just a normal hand one foot away, or a giant hand five
feet away.

Open your right eye.  Now it's easy to tell how far away your hand is.
Notice how you can see things behind the hand with one eye that you can't
see with the other eye.  Each of your eyes is sending a slightly different
picture to your brain.  Then your brain puts the information together and
makes a complete 3-D picture of what you see.

Stereop-Jr does the same thing in a different way.  It makes two pictures
of the same scene, one red, the other blue.  Then it blends them together.
When you put on the 3-D glasses and look at the picture, the left lens
turns the blue parts of the picture black, so you see only the red parts
with your left eye.  The right lens turns the red parts black, so you see
only the blue parts with your right eye.  Then your brain puts the two
pictures back together and makes a 3-D picture.


Stereop-Jr converts three 8-colour flat pictures into one 32-colour
stereoscopic picture.  Five colours (including the black background colour)
of the 8-colour picture and 25 colours of the 32-colour picture are actually
used.  When you look at the stereoscopic picture through the glasses, you'll
see up to five shades of grey.

Each flat picture becomes a "ground" of the finished picture.  Three grounds
are used: the background, the middleground and the foreground.  Each ground
must be "split" and then "overlaid".  Splitting means splitting a ground
into its red and blue (right and left) parts.  Overlaying means blending a
split ground with the grounds behind it.