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%% Define a Filter to Approximate a Gaussian Second Order Partial Derivative in Y Direction % Copyright 2015 The MathWorks, Inc. ydH = integralKernel([1,1,5,9;1,4,5,3], [1, -3]); %% % You can also define this filter as |integralKernel|([1,1,5,3;1,4,5,3;1,7,5,3], [1, -2, 1]);|. This filter definition is less efficient because it requires three bounding boxes. %% % Visualize the filter. ydH.Coefficients