数字图片量化：图像进行高斯滤波，图像直方图均衡及其处理，图像添加噪声并且滤除，矩阵做DCT反变换，对图像做dct变换和量化-Digital image quantization: image Gauss filtering, image histogram equalization and processing, image adding noise and filtering, matrix DCT inverse transform, DCT transform and quantizati