Archive for Computer Vision

Hide from Big Brother using a privacy visor and stealth hoodie

Isao Echizen, an associate professor in The National Institute of Informatics in Tokyo, Japan and Seiichi Gohshi, a professor at Kogakuin University, have developed a visor that can protect the wearer from invasion of privacy caused by unauthorized facial recognition systems. The glasses work by adding noise to the images using a near-infrared light source that affects cameras but not ordinary human vision. When the near-infrared LED in the privacy visor is not lit, facial detection is not affected (Figure a) but when the LED is lit, noise is added to the image and face recognition is prevented (Figure b).

According to Slate, Echizen has received offers from companies that want to commercialize the visors and that they are working on a better version — one that does not need an external power supply — which may be as cheap as $1 per unit.

privacy visor is a kind of glasses that protects against automated face recognition

With the privacy visor and the CV Dazzle project, privacy buffs can probably escape the widening presence of facial recognition systems and software, such as in the EyeSee mannequins. Let’s just hope that these privacy options will evolve into less conspicuous ones that will allow the users to blend in.

In the meantime, the New York artist Adam Harvey has come up with clothing items that can thwart heat signature-sensing cameras. His line of stealth wear fashion includes:

  • anti-drone burqa, hoodie, and scarf: for blocking thermal imaging
  • XX-shirt: a X-ray shielding print that protects the wearer’s heart from X-ray radiation
  • Off Pocket: a phone accessory that blocks a phone’s signal

Stealth Wear: counter surveillance fashion line by Adam Harvey

These counter surveillance items are available for sale at Primitive London.

Image credits: National Institute of Informatics, Primitive London

 

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CV Dazzle: how to block automated face detection

In my previous post, I discussed the EyeSee mannequins that profile store customers by using facial detection. The world seems to be going towards facial recognition becoming a more prevalent technology. A lot of privacy advocates are understandably bothered by this trend. If you’re one of these people, you may want to check out the CV Dazzle project. CV stands for “computer vision” while Dazzle is a form of ship camouflage used during WWI to confuse the enemy and cause him to miss his shot when firing.

Similarly, CV Dazzle uses makeup and hairstyling to prevent automated face detection and to protect privacy. It does not include the use of sunglasses (which some face detection systems have already accounted for), masks (which may be illegal) or hoods (which are obvious).

Some quick tips: partially obscure the nose bridge and the eye area.

CV Dazzle anti-face detection

The current CV Dazzle designs are inspired by tribal paint and high-fashion aesthetics seen in clubs.

If you’re fascinated with this project, Adam Harvey (the guy behind CV Dazzle) is accepting donations and talented contributors.

Image credit: Adam Harvey

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They are spying on you while you eat or shop

Almax, an Italian company, is selling “EyeSee” mannequins — dummies that use facial recognition software to record people’s age, gender, race, and the length of time they spent around the mannequins. The information is then used to improve the store’s layouts, window displays, and promotions to entice customers to buy.

mannequinsWhile overhead cameras have been in use in retail stores for decades, the EyeSee mannequins have hidden cameras that monitor passersby at eye-level. They use the facial recognition technology originally used to identify criminals at airports. But these dummies don’t come cheap. Each one costs EUR 4000 (USD 5130).

According to Bloomberg, several dozen EyeSee mannequins have been sold and are currently in use by five luxury companies in three European countries and the United States. Almax CEO Max Cantanese declined to disclose their clients. Benetton buys mannequins from Almax but denied using the EyeSee system. Burberry and Nordstrom likewise said that they don’t use the mannequins.

Privacy advocates are of course not happy with this technology. Some believe that profiling customers is illegal or at least unethical. Almax sees no privacy issues, however, since the EyeSee does not store images or biometric data.

Soon, the EyeSee mannequins may enable the retailers to eavesdrop on what the customers are saying about the products on display. Almax is adding microphones to the dummies and testing a technology that can recognize words.

On a related note, when I first saw this McDonald’s picture online, I thought it was a prank.

McDonald's in Sydney Airport records conversations

Apparently not. The picture was taken at the entrace of McDonald’s in Sydney Airport. It was posted in Twitter by David Litchfield, a researcher working for the security firm Accuvant.

“Your conversations will be audio and video recorded for quality assurance purposes.”

Hmm, some yummy fast food or privacy? Tough choices! What to choose? What to choose?

Image Credit: Fictures | CC-BY-2.0, via Flickr

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