说明：  硕士论文 1，苹果分级研究目的和意义。 2，苹果自动分级的系统与组成（硬件组成和软件组成） 3，苹果分级中的图像处理和识别 4，苹果大小的特征提取 5基于神经网络对于苹果自动分级 6主要研究的结论和发展趋势。
(Master s thesis 1, apple grading research purpose and meaning. 2, apple automatic grading system and the composition of (hardware and software) 3, image processing and recognition of apple grading 4, apple size feature extraction 5 based on neural network for the apple automatic grading The conclusion of six main research and development trend. )