Evaluation of Tree Vigor by Digital Camera Based on Fruit Color and Leaf Shape
Evaluation of Tree Vigor by Digital Camera Based on Fruit Color and Leaf Shape
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基于果实颜色和叶形的数码相机评价树木活力
DOI：
10.13031/2013.8314
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
T. Kameoka
中科院分区：
文献类型：
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作者：
A. Hashimoto;H. Kondou;Y. Motonaga;H. Kitamura;K. Nakanishi;T. Kameoka
本研究以葡萄为实验材料，研究了一种用数码相机代替人眼获取树木生长信息的新技术。首先，建立了在室外条件下，利用标准RGB色卡和颜色变换矩阵来测量果串表面真实颜色的方法。结果，消除了现场光照条件的影响，并且可以评估它们的肤色。此外，该方法还可以对果串的着色行为进行非破坏性、连续性的验证。通过对葡萄叶的图像分析，研究了葡萄叶的营养状况。由于形状和颜色属于感性信息，对这些信息进行分析和确定一个标准值是困难的。本实验在极坐标系下对叶片的轮廓数据进行分析，从而对叶片的形状特征进行定量分类。总之，这表明，量化的重要因素，农民通常从葡萄树的视觉获得的栽培的可能性。
In this study, using the grapes as the experimental materials, it was examined a newtechnique for getting the information on the tree growth using a digital camera insteadof the human eyes. First, we established the method that the true surface color of thefruit cluster was measured with the standard RGB color chart and the colortransformation matrix in the outdoor conditions. As a result, the influence of the lightconditions in the field was eliminated, and it became possible to evaluate their skincolor. Furthermore, it became clear that using this method could make thenon-destructive and continuous verification of the coloring behavior of the fruitcluster. Then, we studied the nutrient conditions by the image analysis of the grapeleaf. Because the shape and the color belong to the sensuous information, it isdifficult to analyze these information and to determinate a standard value. In thisexperiment, the outline data of the leaf was analyzed in the polar coordinate so that thecharacter of the shape was quantitatively classified. In conclusion, it was shown thatthe possibility of quantifying the important factors in the cultivation, which farmersusually acquired visually from grape tree.