Re: frequency of an image

Mauro wrote:
> Hi all,
> I would like to understand better the idea of frequency (in the
> spatial domain) of an image in relation with an imaged object. Is the
> frequency measured in pixels/cm or cm/pixels?
> Mainly becuase I would like to see whether the Nyquist frequency is
> satisfied over an imaged object in a 3d volume (CT).

In the time domain, frequency is measured in
cycles per second (Hz).  In the space domain,
it is measured in cycles per metre (or
cycles per cm).

-- 
Regards,
Martin Leese
E-mail: please@[EMAIL PROTECTED]
 http://members.tripod.com/martin_leese/