说明：  本文选取了可用于苹果分级的部分特征，并在Matlab上进行试验检测。该方法可以对苹果的外部缺陷、果梗、尺寸和形状进行全面的检测，在此基础上可对苹果进行高速和精确的分级
(This paper can be used for the classification of some of the characteristics of Apple, and carried out in Matlab test. This method can be outside of Apple' s shortcomings果梗, size and shape of a comprehensive test on the basis of Apple' s high-speed and precise classification)