求翻译：然而，由于距离和硬件条件等的限制，在大场景视频监控系统中拍摄到的感兴趣人脸图像分辨率往往比较低，并且得到的图像往往是非正脸的，从而降低了人脸识别的性能。是什么意思？

However, the face image resolution due to the limitations of distance and hardware conditions, the interest taken in the big scene video surveillance system is often relatively low, and the resulting image is often non-positive face, which reduces the performance of face recognition .

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正在翻译，请等待...

However, because of the distance and hardware conditions, restrictions, scenes shot in video monitoring system of interest to face image resolution is often low, and the resulting image is often non-normal faces, thus reducing the performance of face recognition.

正在翻译，请等待...