Mathematica 9 is now available
Wolfram Mathematica Documentation Center
DOCUMENTATION CENTER SEARCH
Function Index /
Previous section-----Next section

DiscreteCorrelate

The option Circular→True (the default) returns a circular correlation result which has the same dimensions as img.
The option Circular→False returns a linear correlation result. The dimensions of the result are larger than the dimensions of the original data. Assuming img is of dimensions Nr × Nc and h is of dimensions Mr × Mc, the returned result is of dimensions Nr+Mr-1 × Nc+Mc-1.
The option TransientSamples→False returns the steady-state samples only.
The option Centered positions the steady-state output values in the output array.
The option Centered only takes effect if Circular→True.
The option Centered→False places all the transient samples at the beginning of the output array. Specifically, element {1,1,...} of the result contains img1,1,... h1,1,..., and element {-1,-1,...} of the result contains img-1,-1,... h1,1,....
The option Centered→True (the default) evenly distributes the transient samples at the beginning and end of the output array. Specifically, element {1,1,...} of the result contains , and element {-1,-1,...} of the result contains .
The argument img may be a vector, matrix, or ImageData expression.
The argument ker may be a vector or matrix.
The ArrayDepth of ker and the raw image data in img must be equal.
See also User's Guide 5.2.

Examples

This loads the package.
In[1]:=
This defines a 1D signal sig and an impulse response ker.
In[2]:=
This returns a circular correlation result.
In[3]:=
Out[3]//TableForm=Out[3]//TableForm=
This returns a linear correlation result.
In[4]:=
Out[4]//TableForm=Out[4]//TableForm=
This returns the steady-state values only (note that this result is independent of option Circular).
In[5]:=
Out[5]//TableForm=Out[5]//TableForm=


Any questions about topics on this page? Click here to get an individual response.Buy NowMore Information
THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT.