本文中可变阈值分割方法和“栅格”技术的采用，使该计算机视觉系统节省了时间，提高了精度和识别处理的速度。

In this paper changing threshold segmentation and grid technology is applied so that computer vision system is to save time, to improve accuracy and processing speed.

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采用矢量与栅格结合的技术进行更新，简化了矢量多边形叠交运算，实现了图斑内部的局部矢量化，提高了处理速度。

And the integrating raster with vector technology predigests the polygon overlaying operation, realizes inner span part vectorizing and speed up the process.

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