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(华盛顿18日综合电)社交网脸书近日兴起“10年挑战”(10-Year Challenge)，但有美国科技界人士质疑脸书只是为了收集用户数据，分析人类面容随年龄增长的变化，训练面容识别程式。

脸书周三否认事件，指风潮不是由他们发起，而且用户所用的照片都早已存在于脸书，公司毫无得益。

奥尼尔最先在推特提出上述说法，有人留言质疑其假设。她其后在《Wired》发表文章反驳，指即使用户的照片早已上载脸书，但不一定是按时序，上载时间亦有可能与拍摄时间相同，这会令数据库含大量不必要资讯。

奥尼尔解释，若要研发面容识别程式，研究员会想要够大够严谨的数据库，最好照片有固定拍摄年期，例如10年。透过此挑战，脸书便可收集到非常大的数据库。

无论如，脸书发言人表示，10年挑战是在用户间出现的风潮，而且用户可自行决定是否开启面容识别功能。

10年挑战风靡社交网，很多用户贴出自己10年前和现在的照片作对比，显示样貌改变。