The fight against child pornography is getting an assist from technology designed by Google Inc. to help identify copyright-protected clips on its YouTube video-sharing site, the Associated Press reports. Four Google employees used their "20 percent time"–during which the company encourages them to pursue unofficial, out-of-the-box projects–to customize the copyright software for the National Center for Missing and Exploited Children’s program for identifying children in sexually explicit photos and video. Software already has been used to match known images, but when new ones are submitted by law enforcement and service providers, analysts generally make identifications manually, often based on recollections. The center has recently employed facial-recognition technology to make those IDs easier, but with limited success. With the new Google tools, analysts can also seek matches based on other attributes, such as the color and shape of a couch or the wallpaper pattern in the background of a photo…

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