Abstract
In order to get a good feeling for the interactive use of Mathematica, we discuss in this section three implementations of convolution with a Gaussian derivative kernel (in 2D) in detail: 1. implementation in the spatial domain with a 2D kernel; 2. through two sequential 1D kernel convolutions (exploiting the separability property); 3. implementation in the Fourier domain. Just blurring is done through convolution with the zero order Gaussian derivative, i.e. the Gaussian kernel itself.
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