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In the image on the bottom, the eye is in the foreground and the text is in the background — and both are blurry because the photographer has focused on a point between the two. A new MIT system instead captures multiple images at several focal depths and stitches them into a sharper composite (top).

Stay focused

The Computer Graphics Group sharpens photographs by capturing multiple low-quality images instead of a single higher-quality image.

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A model of the retinal implant: The coil that surrounds the iris receives visual data from a camera mounted on a pair of glasses. The coil sends the images to a chip attached to the side of the eyeball, which processes the data and sends it to electrodes implanted below the retina.

Stimulating sight

Led by electrical engineering professor John Wyatt, team develops retinal implant that could help restore useful level of vision to certain groups of blind people

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In a wireless network, different transmission frequencies work better for different users. That's because the same transmission reaches each user along several different paths; at one frequency, the signals arriving over different paths might reinforce each other, while at another frequency, they might cancel each other out.

Sharing the air

Unused wireless spectrum is getting scarce; MIT researchers are teaching emerging technologies to coexist in what's left

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