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基于角膜地形图的泪膜视频预处理
Authors
刘孟珂
方正
陈延平
颜黄苹
Publication date
5 December 2019
Publisher
Abstract
在基于角膜地形图的泪膜稳定性评估中,针对眼动、睫毛反射和背景干扰,本文提出了一种泪膜视频的预处理算法。首先,利用索贝尔算子(Sobel operator)进行模糊图像检测,然后对灰度图像进行形态学开运算以获取环状图样凸显的目标图像,再通过霍夫圆检测以及快速傅里叶变换提取目标图像的环状图样频率,依据环状图样频率对目标图像进行带通滤波。最后,二值化及形态学闭运算用于确定环状图样区域。本文从数据库中随机选取10段泪膜视频,应用上述算法逐帧进行泪膜图像处理。实验结果表明,该算法有效地去除了视频序列中的无效图像,并实现了环状图样的定位,为后续泪膜稳定性的评估奠定了基础
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Xiamen University Institutional Repository
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oai:dspace.xmu.edu.cn:2288/176...
Last time updated on 20/11/2020
Xiamen University Institutional Repository
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:dspace.xmu.edu.cn:2288/177...
Last time updated on 20/11/2020