Wednesday, November 5, 2008

CNN has the droids you are looking for

If you were watching election coverage last night, you might have caught the “hologram” appearance of reporter Jessica Yellin.

While not actually a true hologram, it was amusing to watch. The anchors were not really speaking to three-dimensional projected images, but rather empty space. The images were simply added in to the images being sent to your home TV, in much the same way computer-generated special effects are added to movies.

By definition that makes it a tomogram and not a hologram.

A tomogram is an image that is captured from all sides, reconstructed by computers, then displayed on screen.

A hologram is an image projected into space, most commonly using coherent light (like a laser).

But I guess Wolf Blitzer figured “tomogram” wasn’t as cool as opening up the floor for the star wars references.

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