Canon XF105 White Paper - Page 5

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Stereo Window, the Screen Plane and Negative, Zero or Positive Parallax

Simply put, the "Stereo Window" refers to the physical display surface. You will be able to visualize the

concept if you think of your TV screen as a real window that allows you to view the outside world.

Objects in your stereoscopic scene can be behind or outside the window (positive parallax,) on the

window (the Screen Plane or zero parallax,) or inside, between you and the window (negative

parallax.) In the same way objects appear in diﬀerent horizontally oﬀset locations on our retina to

create parallax separation, stereoscopically recorded and displayed objects will appear to have

diﬀerent horizontal oﬀsets (parallax) depending on their depth in the scene. If an object has no

perceivable amount of parallax then we consider it to appear on the screen surface just as the star in

the illustration. This is why converging on an object will make it appear to be at the screen. This can

be done by converging the cameras on the objects while shooting, or by sliding the images

horizontally in opposite directions during post production.

This is the basic principle behind stereoscopic shooting and emulating human binocular vision with

two cameras.

XF300/305 Whitepaper

Tim Dashwood

Stereoscopic 3D