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

[Hartmut]

Follow-up Comment #17, patch #9354 (project octave):

Here are 3 new tests for neighborhoods with even size:


im1 = zeros (5, 5);
im1(2:4, 2:4) = 1;

im1_out_23 = [
    0.1667    0.2233    0.2978    0.2233    0.1667
    0.2233    0.7767    1.0000    0.7767    0.2233
    0.2233    0.7767    1.0000    0.7767    0.2233
    0.1667    0.5533    0.7022    0.5533    0.1667
         0         0         0         0         0];

im1_out_43 = [
    0.1667    0.2813    0.3750    0.2813    0.1667
    0.2500    0.6250    0.7500    0.6250    0.2500
    0.2500    0.6250    0.7500    0.6250    0.2500
    0.1667    0.4375    0.6250    0.4375    0.1667
    0.0833    0.1667    0.2500    0.1667    0.0833];
    
im1_out_44 = [
    0.2500    0.3018    0.3018    0.2500    0.1250
    0.3018    0.6647    0.6647    0.4971    0.1875
    0.3018    0.6647    0.6647    0.4971    0.1875
    0.2500    0.4971    0.4971    0.2500    0.1250
    0.1250    0.1875    0.1875    0.1250    0.0625];
    
assert (wiener2 (im1, [2, 3]), im1_out_23, 1e-4);
assert (wiener2 (im1, [4, 3]), im1_out_43, 1e-4);
assert (wiener2 (im1, [4, 4]), im1_out_44, 1e-4);


You could simply add those tests under the already existing test with "im1".

Those tests
* are Matlab compatible
* and pass

So everything seems fine for even sized neighborhoods.

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