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Family Time

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I'm always impressed by families who find fame in multiple generations. Not when they're famous for the same thing, like former NFL quarterback Archie Manning and current NFL Quarterbacks Peyton & Eli. And not when the offspring is only famous because of the parent, like Ron Reagan or Nicole Richie.

The kind of lush family tree I'm talking about is demonstrated by Denzel Washington and his son, John David Washington. The Academy Award winner's young running back offspring was just named to the practice squad of the St. Louis Rams.

Not impressed by the practice squad? How about Anaheim Angels top draft pick Trevor Bell, whose grandfather was Bozo the Clown?

Here are a few more examples of families who fit the criteria:

"¢ Single mother Bette Nesmith Graham invented liquid paper (White Out) while raising her son, future Monkee Michael Nesmith.

"¢ The father was the commissioner of Major League Baseball (A. Bartlett Giamatti). The son is an acclaimed actor who starred in Sideways (Paul Giamatti).

"¢ On a much smaller scale, Hall of Fame shortstop Ozzie Smith's son Nikko was a Top 12 finalist on American Idol in 2005.

"¢ Beck's mom was a member of Andy Warhol's inner circle.

"¢ Ken Norton was a heavyweight champion boxer (who was initially slated to play Apollo Creed in Rocky). Ken Norton, Jr., was a linebacker who won three Super Bowl rings in the 1990s with Dallas and San Francisco.

"¢ And of course there's former NFL coach George Allen, whose 1990 death may have been caused by icy Gatorade dumped on him by his players (he was coaching at Long Beach State at the time.) His son, also George Allen, is the Republican Senator forever linked to the obscure slur macaca.

Let's put our heads together and expand this list. Which multi-talented families am I missing?

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iStock // Ekaterina Minaeva
Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
May 21, 2017
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iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

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Name the Author Based on the Character
May 23, 2017
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