按多目视觉的理论，利用大重叠影像增大交会角，提高高程精度。
With high overlap images, the intersection angles will augment, and the height precision will be improved.
窗户和眼镜片的反光会造成重叠的影像，而例如相机镜头这样精密的光学系统会将点状光源扩散为看似碟形的现象。
Reflections from Windows and eyeglasses produce superimposed views, and complex optical systems, such as camera lenses, can turn point sources of light into apparently saucer-shaped phenomena.
影像允许每个惯用手或手性纳米结构扁平待定的基础上，高度差在重叠区域观察。
Imaging permitted the handedness or chirality of each flattened nanostructure to be determined, based on the height differences observed at the overlapping areas.
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