文采用计算机视觉技术对脐橙图像进行处理，在分析果实表面颜色特征的基础上，对定性的色泽与着色率进行定量的描述，最后通过神经网络建立分级模型。-the article introduces how to process the graphs of navel oranges by adopting the technique of computer visions and makes a quantitative descr iption of the qualitative color and luster of navel oranges on the basis of the analysis of the color characters of the fruit surface, and finally establishes the models of gradation through the neural network.