[bug #45088] [octave forge] (image) rangefilt requires domain and image to have equal number of dimensions

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Follow-up Comment #31, bug #45088 (group octave):

Going through M-files I saw a "TODO" in medfilt2.m, so I implem,ented
"medfilt" backend in spatial_filtering (all machinery was already in place, so
it was not too bad).

Attached cset (file bug45088_filters_20260312_100.cset) has those changes to
spatial_filtering as well as to entropyfilt.m rangefilt.m stdfilt.m ordfiltn.m
medfilt2.m

I went through demos on MW pages (made a look-alike image with coins (file
coins_octave_gs_640.png) -- feel free to use it in your demos) and they all
look OK to me. E.g. with medfilt2:

octave:1> pkg load image
octave:2> I = imread("coins_octave_gs_640.png");
octave:3> J = imnoise(I,'salt & pepper',0.02);
octave:4> K = medfilt2(J);
octave:5> imshowpair(J,K,'montage')
ans = -39.070

The results are (file medfilt2_coins.png)

Dmitri.
-- 


(file #58352, file #58353, file #58354)

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Additional Item Attachment:

Name: bug45088_filters_20260312_100.cset Size: 11KiB

<https://file.savannah.gnu.org/file/bug45088_filters_20260312_100.cset?file_id=58352>

Name: medfilt2_coins.png             Size: 325KiB
    <https://file.savannah.gnu.org/file/medfilt2_coins.png?file_id=58353>

Name: coins_octave_gs_640.png        Size: 156KiB
    <https://file.savannah.gnu.org/file/coins_octave_gs_640.png?file_id=58354>


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