基于摄像视频分析的降雨量测量方法

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提出一种新颖的基于视频的降雨量测量方法。首先根据雨图亮度变化特征检测雨滴;其次,为解决雨滴离摄像机距离信息未知情况下的雨滴尺寸估计问题,在雨滴成像光度模型中融入散聚焦因素,构建了基于亮度差和色彩张量响应特征的散聚焦雨滴判别方法;然后,根据透视成像关系计算聚焦雨滴的尺寸并根据气象学雨滴谱的定义来构建观测雨滴谱;最后,为抑制观测雨滴谱中的噪声,采用气象学Gamma模型拟合观测雨滴谱,并由模型参数计算降雨量。在不同程度的降雨环境下实验检验算法,并与雨量计记录数据对比,测量结果较为一致。
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