• Liangliang Jia
  • Xinping Chen
  • Minzan Li
  • Zhenling Cui
  • Fusuo Zhang
Conference paper
Part of the IFIP Advances in Information and Communication Technology book series (IFIPAICT, volume 294)


Previous researches have shown that the digital image color intensity could reflect the crops N status, but there is little information about the comparision of spectrum reflectance in the visible bands with the digital imagery color intensities. A field experiment was conducted to compare the wheat canopy reflectance at visible bands (400-700 nm) at shooting stage with near ground digital image to detect N deficiencies. Single color bands of R, G, B and ratio indices of G/R, G/B, R/B, R/(R+G+B), G/(R+G+B) and B/(R+G+B), which derived from digital image and spectral measurments, were regressed with wheat N status. The R, G, G/B, R/B, R/(R+G+B) and G/(R+G+B) all had negative correlations, while the G/R and B/(R+G+B) indices had positive correlations, with plant N status. For the B band, the digital image analysis data got positive correlations while the spectral measurements got negative correlations. With higher correlation coefficient than other indices, the R/(R+G+B) was the best index in this research. Considering the easiness of getting digital images and the accurate prediction of crops N status, the digital image analysis method seems to be a better way for in field plant N status evaluation.


Winter Wheat Spectral Reflectance North China Plain Digital Image Analysis Aerial Photography 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Liangliang Jia
    • 1
    • 2
  • Xinping Chen
    • 1
  • Minzan Li
    • 3
  • Zhenling Cui
    • 1
  • Fusuo Zhang
    • 1
  1. 1.China Agricultural UniversityBeijingChina
  2. 2.Hebei Academy of Agriculture and Forestry SciencesShijiazhuangChina
  3. 3.China Agricultural UniversityBeijingChina

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