图像降噪处理：固定阈值法进行二值化、对二值图像的黑白点噪声消除、对二值图像进行消除孤立黑像素点、均值滤波处理、超限邻域平均法、n*n均值滤波处理、n*n中值滤波处理、十字型中值滤波、N*N最大值滤波、随机噪声处理、进行椒盐噪声处理、局部平均化处理。-Image noise reduction: fixed threshold binarization method for binary images in black and white spot noise elimination, the elimination of the binary image isolated black pixels, mean filtering, overrun neighborhood average method, n* n Mean Filter processing, n* n median filter, a cross-shaped median filter, N* N maximum filtering, random noise, and performs processing salt and pepper noise, local averaging process.