生成具有空间相关性的图像。整幅图像被看作是一个离散的随机场，每个像素都是一个随机变量。对于空间相关性模拟和研究非常有用！-Generated with a spatial correlation images. Whole image is seen as a discrete random field, each pixel is a random variable. For space-related research of simulation and very useful!