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Watch How Computers Perform Optical Character Recognition

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iStock // nikolay100

Optical Character Recognition (OCR) is the key technology in scanning books, signs, and all other real-world texts into digital form. OCR is all about identifying a picture of written language (or set of letters, numbers, glyphs, you name it) and sorting out what specific characters are in there.

OCR is a hard computer science problem, though you wouldn't know it from its current pervasive presence in consumer software. Today, you can point a smartphone at a document, or a sign in a national park, and instantly get a pretty accurate OCR read-out...and even a translation. It has taken decades of research to reach this point.

Beyond the obvious problems—telling a lowercase "L" apart from the number "1," for instance—there are deep problems associated with OCR. For one thing, the system needs to figure out what font is in use. For another, it needs to sort out what language the writing is in, as that will radically affect the set of characters it can expect to see together. This gets especially weird when a single photo contains multiple fonts and languages. Fortunately, computer scientists are awesome.

In this Computerphile video, Professor Steve Simske (University of Nottingham) walks us through some of the key computer science challenges involved with OCR, showing common solutions by drawing them out on paper. Tune in and learn how this impressive technology really works:

A somewhat related challenge, also featuring Simske, is "security printing" and "crazy text." Check out this Computerphile video examining those computer science problems, for another peek into how computers see (and generate) text and imagery.

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Getting Calls From Your Own Phone Number? Don't Answer!
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There’s a new phone scam that could affect you, according to Washington’s KIRO 7 News. In addition to keeping your eyes open for calls that come from area codes like 473 or involve people claiming to be Equifax representatives, you now have to watch out for your own phone number.

Scammers are manipulating your phone’s caller ID to make it look like you’re getting a call from your own phone number, then posing as someone from a wireless carrier like AT&T or Verizon. They tell whoever answers the phone that their account has been flagged for security reasons, then ask for the last four digits of that person’s Social Security number. The FCC has been aware of these scams for at least two years, but they seem to be ramping up once again.

In general, you shouldn’t give out any part of your Social Security number over the phone on an incoming call. If you’re suspicious, you can always call your carrier back using the official customer service phone number on their website or on your bill. But it’s best not to pick up at all. If you receive a call from your own number, don’t answer or press any buttons. Instead, file a complaint with the FCC.

[h/t KIRO 7 News]

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Samsung’s Star Wars Vacuums Offer Everything You Want in a Droid
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Samsung

Hate housecleaning but love Star Wars? Samsung’s got the solution. In anticipation of December’s Star Wars: The Last Jedi, the newest film in the Star Wars saga, Samsung has transformed a limited number of its VR7000 POWERbot robot vacuum cleaners into two familiar faces from George Lucas’s legendary space opera: a Stormtrooper and Darth Vader (which comes with Wi-Fi connectivity and a remote control).

In order to create a unique device that would truly thrill Star Wars aficionados, Samsung consulted with fans of the film throughout each stage of the process. The result is a pair of custom-crafted robo-vacuums that fill your home with the sounds of a galaxy far, far away as they clean (when you turn Darth Vader on, for example, you'll hear his iconic breathing).

“We are very pleased to be part of the excitement leading up to the release of The Last Jedi and to be launching our limited edition POWERbot in partnership with Star Wars fans,” B.S. Suh, Samsung’s executive vice president, said in a press statement. “From its industry-leading suction power, slim design, and smart features, to the wonderful character-themed voice feedback and sound effects, we are confident the Star Wars limited edition of the VR7000 will be a big hit.”

Be warned that this kind of power suction doesn’t come cheap: while the Stormtrooper POWERbot will set you back $696, the Darth Vader vacuum retails for $798. Who knew the Dark Side was so sparkling clean?


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