描述了基于图像分析的传输流量检测的激光扫描成像偏移原理和三角测量方法。

Laser scan imaging and shifting principle, and triangle measuring approach for the transmission flow are described based on the image analysis.

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柱面散光轴位角进行手动测量，数码显示的数字化屈光度测量仪。本仪器采用特殊的处理电路，消除了外来噪声产生的误触发脉冲及输出错误积累而引起的位置偏移。

This instrument has a rotary encoding and raster and it has a special processing circuit not only eliminating trigger pulse case by noise but also clearing up position accumulates error.

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精确地获得光栅条纹中心线的相对偏移量，在三角形法测量物体三维轮廓技术中占有非常重要的地位。

The sub-pixel accuracy in abstracting the fringe-centerlines can be obtained by the method of barycenter after preprocessing the fringe picture using grating projection.

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