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棉花学报  2012 

不同棉花群体冠层数字图像颜色变化特征研究

DOI: 1002-7807(2012)06-0541-07, PP. 541-547

Keywords: 棉花冠层,数字图像,RGB,HIS,生育期

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Abstract:

为了探索利用数字图像监测棉花长势的方法,研究了不同群体的冠层数字图像颜色变化特征。结果表明,RGB模型中,R分量在全生育期呈现开口向上的二次曲线变化趋势;G分量变化为开口向下的二次曲线;不同密度B分量差异较大,变化曲线形状介于R和G之间。RGB组合性状中,R/(G+B)、R/G、R、R/B类似,B、B/(G+R)、B/G类似,G、G/(R+B)类似,其中R/G、G/(R+B)、R/(G+B)的二次曲线特征更明显。HIS模型中,H分量变化趋势为开口向上的二次曲线;I分量变化基本符合二次曲线;S分量变化无二次曲线特征。R,G,R/G、G/(R+B)、R/(G+B)以及H分量在整个生育期变化具有一定的规律可循,可能是反映作物长势的潜在指标,这将对数字图像监测作物长势具有重要意义。

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