infer a 2D filter from its frequency spectrum

Dear all,
I am working on a 2D convolution problem. I have estimated the
frequency spectrum |H(u, v)| now I wish to infer the 2D filter f(x,
y).
I just don't know a way to work it out from the spectrum, although I
may have several constrains of f(x, y) in the spatial domain for
assistance.

It will also be helpful if there's a good way to easily compute
derivative d|H(u, v)|/df(x, y), that I can optimize f(x, y) in the
spatial domain.

Any ideas?

Thanks!

Won't taking ifft2 help to get your f(x,y) coefficients?

Regards
Bharat Pathak

Arithos Designs
www.Arithos.com

	Arithos Designs is conducting 2 day workshop on "Fundamentals of 
        DSP using Matlab/Octave" on 18th and 19th October at Pune. For
        more details send mail to bharat@arithos.com

I don't have H(u, v), but only |H(u, v)|, or in other words, the phase
is unknown.


On Oct 7, 7:15&#4294967295;pm, "bharat pathak" <bha...@arithos.com> wrote:
> Won't taking ifft2 help to get your f(x,y) coefficients?
>
> Regards
> Bharat Pathak
>
> Arithos Designswww.Arithos.com
>
> &#4294967295; &#4294967295; &#4294967295; &#4294967295; Arithos Designs is conducting 2 day workshop on "Fundamentals of
> &#4294967295; &#4294967295; &#4294967295; &#4294967295; DSP using Matlab/Octave" on 18th and 19th October at Pune. For
> &#4294967295; &#4294967295; &#4294967295; &#4294967295; more details send mail to bha...@arithos.com