Diagnosis of Nitrogen Nutrition of Rice Based on Image Processing of Visible Light

文献类型： 外文期刊

第一作者： Yuan, Yuan

作者： Yuan, Yuan;Chen, Lei;Li, Miao;Wu, Na;Wan, Li;Wang, Shimei

作者机构：

关键词： visible light;digital image;Nitrogen diagnosis;SPAD;rice

期刊名称：2016 IEEE INTERNATIONAL CONFERENCE ON FUNCTIONAL-STRUCTURAL PLANT GROWTH MODELING, SIMULATION, VISUALIZATION AND APPLICATIONS (FSPMA)

ISSN：

年卷期： 2016 年

页码：

收录情况： SCI

摘要： A field experiment was carried out to explore the feasibility of visible image processing technique in rice nitrogen nondestructive diagnosis. Based on the image processing technology of visible light, this study investigated the relationship between the nitrogen status of rice and the greenness of rice leaves, which are captured by digital camera. Data were collected on Luhan 1 rice variety and included photos and SPAD values of leaves. Linear regression s were performed between the extracted color feature parameters and the distribution characteristics of rice leaf SPAD values at different positions (leaf tip, leaf middle and leaf base), in order to identify the best color feature parameters, the best positions and the optimum period for rice nutrition diagnosis. The results showed good linear correlation between the SPAD values and some color features, including NRI, Hue, and DGCI in the whole growth period, where the determination coefficients were 0.92**, 0.99** and 0.99** respectively. The experimental results demonstrated that leaf middle was a more suitable position for rice nitrogen diagnosis than leaf tip and leaf base. Both the tillering stage and booting stage of rice are the crucial diagnosis stages for assessing the rice nitrogen status. The experimental results indicated that combining SPAD and visible image processing technique is usable in diagnosing the nitrogen nutrition of rice. The proposed method is fast, non-destructive and easy to apply.

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