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Microsoft improves facial recognition across skin tones, gender

The technology's bias is showing.
Rob LeFebvre, @roblef
June 26, 2018
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Facial recognition is everywhere. The technology is used in China to make kids pay attention and in California to order burgers. You can of course use your face to unlock your iPhone, but the tech also has the potential to screen passengers at US airports and recognize criminals. These last two uses are problematic, as the tech isn't ready to handle darker skin tones and genders. Microsoft hopes to help fix this problem with improved facial recognition technology the company claims has reduced error rates for men and women with darker skin by 20 percent.

According to Microsoft, commercially-available software performs best on males with lighter skin and the worst on females with darker skin. The new software system the company has been testing was able to reduce error rates by nine times for all women and significantly improve accuracy across all demographics. Ultimately, said Microsoft, the problem is the training datasets; more data is needed that includes diverse skin tones as well as hairstyles and facial accessories like jewelry and glasses.

Microsoft's Face API team made three major changes to its recognition system. They expanded and revised the current datasets, started collecting even more data and focused the resulting models specifically on skin tone, gender and age. "We had conversations about different ways to detect bias and operationalize fairness, said senior researcher Hanna Wallach in a statement. "We talked about data collection efforts to diversify the training data. We talked about different strategies to internally test our systems before we deploy them."

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