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3D – How to “FreeView” 3D Stereoscopic Images

FreeView 6

The above is an example Stereo Pair 3D image from the 3D Feature Film “Cane Toads” . (Double Click on the images for larger versions.)

3D FreeViewing , unlike other 3D viewing methods, does not require any other apparatus or special equipment to view an image in 3D. As a viewing method is more associated with viewing stills and 3D previs as it can be quite a strain on the eyes to view motion picture images this way for a prolonged period. The 3D FreeView method does however render a beautiful 3D scene as there is no Crosstalk between the Stereo pair that is otherwise apparent in most other electronic 3D viewing apparatus.

Analog systems like the “3D Viewmaster” are also produce very pure viewing methods.

3D ViewMaster

This ‘FreeView 3D’ image is composed of stills from both the Left and Right Eye. The Right Image is from

the Left eye and the Left Image is from the Right eye. When viewing you have to go somewhat crosseyed for your brain to fuse the two images together as a 3D image. See Below.

How to FreeView 3D

1. Look at the pair of images on the screen. (Double click the image for a larger version)

2. While still Focusing on the Screen, Hold one finger in between your eyes and the image onScreen. You will see your finger as two ghost images.

3. Still focusing on the screen, move your finger towards, or away from, the screen until the tip of your ‘ghost fingers’ align with the two circles.

4. Now focus on your finger. You will now perceive 3 ghost circles behind your finger. The centre circle will be the fused 3D image. (You may have to rotate your head a little so that the 2 images align vertically.)

5. Here is the tricky bit. While still focusing at the point where your finger is, move your finger away to reveal the 3D image behind it. For beginners your eye will naturally want to focus back to the screen so for a while you can help your brain fuse the 3D by leaving your finger slightly in view.

The result will be that in this case you see the green dot sitting forward of the black circle in 3D space.

With practice you will find it second nature. I had looked at many 1990′s stereograms or “magic eye” pictures in my youth so I picked it up quite quickly :)

Free-View 2

Have fun.

Adrian Hauser

One Response to “3D – How to “FreeView” 3D Stereoscopic Images”

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