Hadaia came up with an idea that could help stop movie piracy.Hadaia’s idea uses infrared (红外线的) light.This range of light is invisible to the human eye.It is visible,however,to many types of cameras.Theater owners could place small infrared lights on their movie screens.The lights would not disturb people watching the movie.It would,however,distort the recordings made by many types of cameras.
To test her idea,Hadaia built a box with a movie screen inside.Then,she projected images on that screen through a hole in the box.She took recordings of those images,using nine different types of cameras.These included the types found in cell phones as well as camcorders.During some tests,she also turned on light emitting diodes (发光二极管),or LEDs.The LEDs were embedded(植入的)in a certain place behind the movie screen.They gave out infrared light.
Sure enough,she showed,a pirated movie included odd stripes or spots if it had been recorded while the LEDs were on.It might be possible to use the LEDs to flash the date and time on the movie screen.The information would then appear in the illegal recordings.Theater owners or police might use the information to track down the pirates.
Cutting down on piracy might get more people into theaters to watch the real movie instead of an illegal copy.Six out of every ten films now produced aren’t profitable.They don’t make enough money to recover how much was spent to make and market them.Such a poor payback can discourage filmmakers from producing anything but the types expected to become blockbuster hits.It might also keep smaller theaters from showing a wider variety of movie types.
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