对一幅彩色图像进行近邻、双线性、三次立方卷积放大，放大倍数2、3、4、倍，实现 Roberts算子、Sobel算子 等图像处理方法-Color image of a close neighbor, bilinear, three cubic convolution zoom, magnification, 3, 4 times, Roberts operator, Sobel operator, such as image pr