[IMAGE-SIG] convolution

[Huang, James]

I am not familiar with NumPy, but I know there are many program can 
calculate both FFT and inverse FFT with a control flag (1 or -1).  You may 
look at the parameters required by the FFT function.  Good luck!

James

----------
From:  Fredrik Lundh[SMTP:fredrik@pythonware.com]
Sent:  Tuesday, July 29, 1997 9:58 AM
To:  image-sig@python.org; MISS. K.L.COLLIER
Subject:  Re: [IMAGE-SIG] convolution

MISS. K.L.COLLIER wrote:
>I would like to find the convolution of two images.
>I notice there is a convolve function but it is only 1D.
>There are 2D fft's but not an inverse 2d fft. How do I go about doing 
this?

Guess you're talking about NumPy -- PIL supports 2D convolutions, but
the current version only provides a number of predefined kernels (to be
fixed some day).  And are you sure there's no inverse FFT in NumPy?
I'm 98% sure I've seen people using it...

If noone here can answer this (David?), check with the folks on the
matrix-sig. After all, that's where you find the NumPy experts.

Cheers /F (image-sig organizer)



_______________
IMAGE-SIG - SIG on Image Processing with Python

send messages to: image-sig@python.org
administrivia to: image-sig-request@python.org
_______________


_______________
IMAGE-SIG - SIG on Image Processing with Python

send messages to: image-sig@python.org
administrivia to: image-sig-request@python.org
_______________