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Legacy Documentation

Digital Image Processing (2000)

This is documentation for an obsolete product.

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ConstantPad

ConstantPad[img, {b₁, e₁}, v] pads img by repeating the constant v b₁ times at the beginning and e₁ times at end of img.

ConstantPad[img, {b₁, e₁}, {b₂, e₂}, ..., v] pads img by replicating the constant v b_i and e_i times, respectively, at level i of img.

ConstantPad returns an array of dimensions given by

N_i + b_i + e_i, for i=1,2,..., ArrayDepth[img]

where N_i is the ith dimension of img.

ArrayDepth of img must match the number of {b_i, e_i} arguments.

The argument img may be any array or ImageData expression.

See also User's Guide 4.4.

New in Version 2.

Examples

This loads the package.

In[1]:=

Here a list is padded on the tail end only.

In[2]:=

Out[2]=

This pads the list on both ends by repeating the constant value 1.

In[3]:=

Out[3]=

This pads the rows and columns on one side only.

In[4]:=

Out[4]//MatrixForm=