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

[Carnë D. <car...@gm...>]

On 12 November 2012 21:21, Jordi Gutiérrez Hermoso <jo...@oc...> wrote:
> 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.

You can't. Your alternative gives a syntax error, I believe you meant
what I tried below which still does not give the same result. See:

octave> 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> fftconv2(fftconv2([1 2; 3 4; 5 6], 1:2), 1:3)
ans =

    1    6   15   20   12
    3   16   37   46   24
    5   26   59   72   36

Carnë