第四，探讨了彩色显微图像输入中光学系统的误差及其消除方法，并结合实际需求，研究了图像中不规则轮廓区域面积的测量方法。
The forth, error analysis and elimination of optical system in color microscopic image input and the methods of area measurement for the irregular region in the digital image are discussed.
利用薄膜的这一特性可以消除光学系统中不想要的偏振效应以保持光的偏振状态，也可以用来制作薄膜位相延迟片。
This feature not only can be used to cancel unwanted polarization effects in optical system, but also can be used to fabricate phase retarder.
目的：应用改变近用老视镜的光学中心所产生的三棱镜效应，消除老视患者近距离阅读和工作的肌性视疲劳。
AIM: To evaluate the therapeutic effects of using prism effect in the correction of muscular asthenopia by changing optical center of presbyopic glasses.
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