改进后的方法能尽可能多地从图像中提取直线信息，既可以较准确地提取直线的端点信息，又能得到直线的准确表示。

Lastly least square method is used to fit for the straight line. The improved method can extract so much information as possible from original images.

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然后使用lineTo API来从这个起始点到传递到这个lineTo调用中的端点之间绘制一条直线。

Then use the lineTo API to draw a line from the start point to the end point passed in to the lineTo call.

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给出了用两端点法、最小二乘法对平面内的直线度进行综合评定的方法。

This paper presents the integrated evaluating method of line error in a plane by two endpoint and least square method.

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