The failure rate rose to about 5 percent with masked images tested with the most effective systems.

而最有效系统识别戴口罩照片时的失败率上升到5%左右。

The researchers reported that the systems were much more effective at identifying individuals when one image of the person was masked and the other was unmasked.

研究人员报告称，在一个人的一张照片佩戴口罩，而另一张照片未佩戴口罩时，这种系统在识别个体方面更加有效。