The second solution may lead to detection defect when the signatures move or turn because of the sheet placement and/or the characters of the collating machines themselves.

• 方案二的缺陷是：由于放置偏移，或在工作过程中由于配页机自身的特性引起书帖发生位置移动或扭转，造成图像检测失误，书帖鉴别率不高。