In the two actual tunnel, we measured and calculated visibility of the small target under the three light source, and made a visual experimental method of the small target color.
2
数码摄像技术作为一种方便、快速、可靠的高科技技术，在隧道的测量中有着极大的发展潜力。
As a kind of convenient speedy and reliable high technology, the digital photography technology has tremendous potential in tunnel measurement.
3
同时，隧道断面测量的结果还是优化隧道设计和施工的重要依据。
Also, the optimizing the tunnel design and the construction are according as the result of surveying of the tunnel contour.
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