Tom Scott has created a brilliant demonstration video of the Pulfrich Effect. You’ll need a pair of ordinary dark glasses – use just one side to cover just the right eye. Then watch his video. You’ll see the video in full color 3D, event though it is a 2D video.
3D video enthusiasts may already know a bit about how this works. When a camera is panning across a scene, each frame records a “position” in time. We sometimes use this trick to convert a 2D video into a 3D video by recording in 2D, but then creating a separate left and right track with the tracks separated by a single frame from the original 2D recording. This creates a left image track – and a right image track – by taking advantage of the movement in the scene.
The technique works as long as either the camera is moving or one or more objects in the scene are moving laterally. It does not work if objects are moving vertically or if objects or the scene are stationary.
The Pulfrich Effect uses the same idea but incorporates the peculiar nature of our optic system. Specifically, our eyes process darkened images slightly slower than bright images. The darkened image seen through dark glasses covering one eye are processed with a delay of about 15 milliseconds which works out to about 1/60th of a second. (The actual processing delay depends on the actual darkness of the image and could be more or less.)
Tom’s Youtube channel is here. He’s always got fascinating topics and I encourage you to subscribe to his channel on Youtube.
Experiment: I suspect this works also for VR 3D. Take a VR 360 video but keep the camera slowly rotating during filming. Then, cover one eye with a dark glasses shade while watching the VR video using a VR set up. As long as the subject is slowly moving laterally, the 3D effect should be visible in 3D!
[The featured photo for this post is from Pixabay.]
Stereo Sisters will be hosting an evening of Women in 3D Animation. Women from various skill levels and disciplines will come together to explore various 3D Animation techniques and share their experiences.
VR seems likely to achieve success in gaming and specialized applications (engineering, science, medicine for example).
Will VR be a big story telling medium?
How will consumers react to the need to wear VR helmets?
(I use the term “VR helmets” since they are …. Consumer tech reporters said 3D required wearing “3D goggles that no one wanted to wear” – the same writers now enthusiastically endorse VR helmets because … well, wearing a helmet is simpler than wearing glasses?)
Photographed in 2012 but delayed due to *numerous* technical difficulties with video editing software that destroyed the project three times! Even in this final version, Sony Vegas Pro is unable to output standard side-by-side 3D without scrambling the video!
Photographed using dual Lumix GH-2 cameras and dual Canon HF M100 camcorders. Music licensed from The Music Bakery.
“3D Thumbs outwards!”, says Sikel and Ebert
“Totally rocks!”, says a geologist
“Puts the Steam in Steampunk”, says Professor Elemental
“Breathtaking – can’t breath due to the sulfur!”, said a kid at the hot springs
“The Force Awakens!”, said no one in particular.
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