[Octave-patch-tracker] [patch #9354] image package: new function wiener2.m

[Hartmut]

Follow-up Comment #13, patch #9354 (project octave):

Here is the Matlab result for more exotic input types:

* wiener2([])  ->   []

* wiener2(logical([0 0; 1 1]))  -> logical(ones(2,2))

This is NOT what our current Octave implementation of wiener2.m does. (Because
this is NOT what the Matlab help says: "Class Support: The input image I is a
two-dimensional image of class uint8, uint16, int16, single, or double. The
output image J is of the same size and class as I.")

So we should probably change our input checks accordingly, and add the above
two lines as new tests to the function.



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