传统做法都是手工测量采集原始数据，效率较低。
The traditional way of collecting the data manually is not so efficient.
其方法代替了传统的手工测量，而且易于机器自动反馈控制玻璃棒的直径变化。
The method not only can substitute traditional manual measurement, but also can control the change of the diameter by machine conveniently.
通过与手工测量进行对比，图像处理方法评价客观，测量精度高，得到了满意的结果。
Compared with handicraft, image processing has many advantages, such as objective evaluate result, high measure accuracy, etc. Furthermore, we got satisfied results.
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