A method of making digital fruit color charts for cultivation management and quality control
A method of making digital fruit color charts for cultivation management and quality control
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一种用于栽培管理和质量控制的数字水果色卡制作方法
DOI：
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发表时间：
2004
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：
Y. Motonaga;H. Kondou;A. Hashimoto;T. Kameoka
目前，农业中的彩色图表是栽培管理和质量控制的重要工具。它们缺乏良好的颜色再现性，因为它们是由熟练的工匠通过颜色混合制成的。本研究利用数位彩色影像处理技术，发展出一套具形状及色彩分析之彩色图表制作方法。以葡萄品种阿基皇后为试材。首先，使用数码相机在标准照明下获得单个葡萄的图像。从所获取的图像中提取葡萄的轮廓。通过使用r-θ-θ坐标系平均轮廓来确定标准葡萄浆果形状。HSL（色调，饱和度，亮度）颜色系统下的颜色分析表明，H的平均值是成熟度的指标和S值的强烈影响的盛开粘附在浆果表面。根据这些结果，颜色匹配技术被用来创建数字颜色图表，描绘了不同成熟度的合成，标准形状的葡萄。从这项研究中得到的颜色图表忠实地表达了浆果表面的信息，这是从传统的图表省略。在这项研究中开发的方法可以应用于其他农业的情况下，需要估计的颜色和形状。
Current color charts in agriculture are an important tool for cultivation management and quality control. They lack good color reproducibility, because they are made by color mixing by a skillful craftsman. In this study, a method of making a color chart with shape and color analysis was developed using digital color image processing. The grape variety Aki Queen was selected as the experimental material. First of all, images of individual grapes were obtained under standard illumination using a digital camera. Outlines of the grapes were extracted from the acquired images. A standard grape berry shape was determined by averaging the outlines using the r-θ-ϕ coordinate system. Color analysis under the HSL (hue, saturation, lightness) color system revealed that the average value of H was an indicator of maturity and the S value was strongly influenced by the bloom adhering to the berry surface. In light of these results, color-matching techniques were used to create digital color charts depicting a synthesized, standard-shaped grape at varying degrees of maturity. The color charts resulting from this study faithfully express the berry surface information which is omitted from conventional charts. The method developed in this study could be applied in other agricultural situations where estimates of color and shape are required.