对三维图像进行求导的一个程序，利用高斯卷积后对图像求导相当于对高斯函数求导的性质。是用itk库写的一个通用模板类，里面还有例子。-Computation of local image derivatives is an important operation in many image processing tasks that

involve feature detection and extraction, such as edges, corners or more complicated features. How-

ever, derivative computation in discrete images is an ill-posed problem and derivative operators without

any prior smoothing are known to enhance noise. Here we present a new convolution operator, the

GaussianDerivativeOperator, that allows to calculate locally Gaussian derivatives of N order. Fur-

thermore, we present some useful classes and examples that make use of this new operator.