According to the engineering practice, the arithmetic of edge check can decrease the supposititious edge pairs and image noise, and has high precision and practicality.

工程实践证明，算法能抑制虚假边沿的出现，消除图像噪声，在实际应用中具有较高的精度和实用性。

youdao

Did no one check the arithmetic in the tables, which are full of errors?

难道没有一个人检查一下那些表格中的错误百出的计算？

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Think of the lowly bar code that makes the lines go faster at the check-out counters, raises the productivity of the check-out girls and boys, and relieves them of the need to do arithmetic.

FORBES: Jobs and Public Policy