实现图形图像的平滑处理，可对８位和２４位的图像进行处理，产生噪声用到 了随机噪声和椒盐噪声，处理用到噪声消除法，领域平均法和中值滤波法～-Realize smooth handle graphics images can be 8-bit and 24-bit image processing, resulting in noise using a random noise and salt and pepper noise, use noise reduction treatment