图像预处理，在进行图像识别前，首先要对失真的变质的图像进行预处理，即先对图像进行滤波处理，出此之外还对图像进行增强处理。-The image pre-processing, carrying out image recognition, we should first of the distortion of the deterioration of the image pre-processing, that is, first filtering the image out of this