COMPARSION OF MULTISPECTRAL REFLECTANCE WITH DIGITAL COLOR IMAGE IN ASSESSING THE WINTER WHEAT NITROGEN STATUS
作者： Liangliang Jia , Xinping Chen , Minzan Li , Zhenling Cui , Fusuo Zhang
DOI: 10.1007/978-1-4419-0211-5_43
关键词:
摘要: Previous researches have shown that the digital image color intensity could reflect crops N status, but there is little information about comparision of spectrum reflectance in visible bands with imagery intensities. A field experiment was conducted to compare wheat canopy at (400-700 nm) shooting stage near ground detect deficiencies. Single R, G, B and ratio indices G/R, G/B, R/B, R/(R+G+B), G/(R+G+B) B/(R+G+B), which derived from spectral measurments, were regressed status. The R/(R+G+B) all had negative correlations, while G/R B/(R+G+B) positive plant For band, analysis data got correlations measurements correlations. With higher correlation coefficient than other indices, best index this research. Considering easiness getting images accurate prediction method seems be a better way for status evaluation.
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