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ShenCastanFilter

ShenCastanFilter[n₁, n₂] returns a pair of the Shen and Castan directional edge filters of dimensions n₁× n₂.

ShenCastanFilter[n₁, n₂, ..., n_N] returns a list of the Shen and Castan directional edge filters each of dimensions n₁×n₂×... ×n_N.

The Shen and Castan filters are based on samples of the derivative of the exponential function that was found to have optimal step edge detection properties [She92].

ShenCastanFilter is a list of filters, each formed from a discrete sampling of the first derivative of the exponential function in one dimension and of the exponential function in the other dimensions.

See also User's Guide 7.3.

New in Version 2.

Example

Here we load the package.

In[1]:=

In[2]:=

Out[2]=

Here we plot the pair of 15 × 15 Shen-Castan edge detection filters.

In[3]:=

Out[3]=

Out[3]=

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