Re: [OctDev] [Pkg-octave-devel] [RFU] octave-image 2.0.0-1

[Doug S. <dou...@gm...>]

octave-3.2.4:1>  conv2(1:3, 1:2, [1 2; 3 4; 5 6])
ans =

    1    4    7    6
    5   18   31   24
   11   36   61   42
   10   32   54   36



On Mon, Nov 12, 2012 at 4:21 PM, Jordi Gutiérrez Hermoso <jo...@oc...
> wrote:

> On 12 November 2012 08:59, Sébastien Villemot <seb...@de...>
> wrote:
> > Rafael Laboissiere <ra...@la...> writes:
> >
> >> I prepared version 2.0.0-1 in experimental for upload.  I added two
> patches in
> >> this version:
> >
> > Uploaded.
> >
> >> 1. fftconv2-usage.patch: This removes one of the bogus usage of
> fftconv2.  I
> >> discussed this with the upstream author Carnë Draug in the octave-dev
> mailing
> >> list.  Feel free to revert my patch if you think it is not appropriate.
> >
> > Since your patch fixes #664716, I kept it. I don't know how upstream
> > wants to solve the issue.
>
> Talking to Carnë in IRC, it seems clear that the problem isn't that
> the test is wrong but rather that fftconv2 is wrong here. It seems
> like an actual bug.
>
> OF list: fftconv2's vector-vector-matrix three-arg call seems
> incorrect and seems to have been incorrect for some time. Can anyone
> please confirm? These two calls should both be equal:
>
>     octave:1> conv2(1:3, 1:2, [1 2; 3 4; 5 6])
>     ans =
>
>         1    4    4
>         5   18   16
>        14   48   40
>        19   62   48
>        15   48   36
>
>     octave:2> fftconv2(1:3, 1:2, [1 2; 3 4; 5 6])
>     ans =
>
>         1    4    7    6
>         5   18   31   24
>        11   36   61   42
>        10   32   54   36
>
>
> The upper result is correct. You can nobtain this result with
> fftconv2(fftconv2([1 2; 3 4; 5 6,1:2),1:3), so I think this should be
> fairly easy to fix.
>
> Patches, anyone?
>
> - Jordi G. H.
>
>
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-- 
DAS

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