对给定的多幅图片先进行训练分类，并进行频率分析，对于测试的图像与训练图像进行频率做差，求其最小的差值所对应的训练图像，就实现了图形识别。-For a given number of pictures first training classification, and frequency analysis, for the test image and training images to do the frequency difference, find the minimum differe