How Japan's Privacy Visor fools face-recognition cameras

The visor angles overhead light into cameras, confusing computer vision systems

Staffers at the National Institute of Informatics in Tokyo on August 11, 2015, show how a facial recognition system can identify someone wearing sunglasses (right) but not someone wearing the Privacy Visor (left), developed at the institute.

Staffers at the National Institute of Informatics in Tokyo on August 11, 2015, show how a facial recognition system can identify someone wearing sunglasses (right) but not someone wearing the Privacy Visor (left), developed at the institute.

If you're worried about Big Brother monitoring you from security cameras, Japan has developed eyewear that can keep you anonymous.

The Privacy Visor consists of a lightweight, wraparound, semitransparent plastic sheet fitted over eyewear frames. It's bulky and not exactly stylish, but it could have customized designs.

It's meant to thwart face-recognition camera systems through a very simple trick. It reflects overhead light into the camera lens, causing the area around the eyes to appear much brighter than it normally does.

That's enough to trick standard face-recognition systems, such as the Viola-Jones object detection framework, according to the National Institute of Informatics (NII), which has been developing the visor for years.

At a demo on Tuesday, NII staffers showed how a face-recognition program can easily identify someone by comparing video input to a database of head shots. The system also works when the subject is wearing sunglasses.

But the program couldn't identify a face when the subject was wearing the latest Privacy Visor prototype, which has a plastic film wrapped around 3D-printed frames.

Because the white plastic sheet is angled downward, such that the part near the nostrils sticks out more than the part near the eyes, it sends bright light toward the camera. That's the opposite of what some face-recognition algorithms expect, namely darker areas around the eyes and brighter areas around the nose and cheekbones. Those are the kinds of landmarks they need to find a face.

"This is a way to prevent privacy invasion through the many image sensors in smartphones and other devices that can unintentionally photograph people in the background," said NII researcher Isao Echizen, who has been developing the visor through several prototypes. He cited facial recognition apps such as NameTag for Google Glass as an example of how the technology is spreading.

A 2012 version, powered by a lithium-ion battery, included LED lights around the nose that shined near-infrared light toward cameras. Computer-vision systems were also fooled by the bright light, but the visor looked dorky and required a bulky power source.

While the latest prototype doesn't need power, it cuts incoming light by about 50 percent, but one's surroundings are still easily visible. The white pattern on the surface of the wraparound film can be created in various custom designs including horizontal lines, hexagons, or a web pattern -- as long as there's enough white material to reflect the overhead light.

NII plans to sell a more compact, stylish version of the latest prototype with titanium frames next year.

An NII partnership with eyewear manufacturers has raised two-thirds of its ¥2 million (US$16,016) goal in a crowdfunding campaign aimed at commercializing the glasses. Early-bird backers can order them for about ¥20,000 but they'll cost at least ¥30,000 when they go on sale in June 2016.

Tim Hornyak covers Japan and emerging technologies for The IDG News Service. Follow Tim on Twitter at @robotopia.

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection

Tags consumer electronicsNational Institute of Informaticssecurityprivacy

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Tim Hornyak

IDG News Service
Show Comments

Father’s Day Gift Guide

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

David Coyle

Brother PocketJet PJ-773 A4 Portable Thermal Printer

I rate the printer as a 5 out of 5 stars as it has been able to fit seamlessly into my busy and mobile lifestyle.

Kurt Hegetschweiler

Brother PocketJet PJ-773 A4 Portable Thermal Printer

It’s perfect for mobile workers. Just take it out — it’s small enough to sit anywhere — turn it on, load a sheet of paper, and start printing.

Matthew Stivala

HP OfficeJet 250 Mobile Printer

The HP OfficeJet 250 Mobile Printer is a great device that fits perfectly into my fast paced and mobile lifestyle. My first impression of the printer itself was how incredibly compact and sleek the device was.

Armand Abogado

HP OfficeJet 250 Mobile Printer

Wireless printing from my iPhone was also a handy feature, the whole experience was quick and seamless with no setup requirements - accessed through the default iOS printing menu options.

Azadeh Williams

HP OfficeJet Pro 8730

A smarter way to print for busy small business owners, combining speedy printing with scanning and copying, making it easier to produce high quality documents and images at a touch of a button.

Andrew Grant

HP OfficeJet Pro 8730

I've had a multifunction printer in the office going on 10 years now. It was a neat bit of kit back in the day -- print, copy, scan, fax -- when printing over WiFi felt a bit like magic. It’s seen better days though and an upgrade’s well overdue. This HP OfficeJet Pro 8730 looks like it ticks all the same boxes: print, copy, scan, and fax. (Really? Does anyone fax anything any more? I guess it's good to know the facility’s there, just in case.) Printing over WiFi is more-or- less standard these days.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?