When initial control point pair is obtained, variance check and error check were used to exclude fake control point pairs to get the final ones.

在得到初始控制点对后，以方差检验和误差检验来递归排除错误的控制点对，从而得到最终的控制点对。

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At present, check point machine exists several defects in high price, inconvenience purchase and maintenance in home enterprise. Furthermore check point machine drop behind in technique.

目前，国内大多数企业所使用的点检机均从国外进口，存在价格高、购买和维修不方便等诸多缺点，而国内少数公司生产的点检机则技术较落后、稳定性不高。

youdao

At present, check point machine exists several defects in high price, inconvenience purchase and maintenance in home enterprise. Furthermore check point machine drop behind in technique.

目前，国内大多数企业所使用的点检机均从国外进口，存在价格高、购买和维修不方便等诸多缺点，而国内少数公司生产的点检机则技术较落后、稳定性不高。

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