Re: Spatial frequency

Posted by dksamuel on Nov 19, 2005; 4:31am
URL: http://imagej.273.s1.nabble.com/Re-Spatial-frequency-tp3704423p3704424.html

can a ImageJ read a RGB photo (taken by a cheap USB Camera) and filter it to
show only the colors between 2 wavelengths (say between 465 and 495 nm, this
is useful for filtering based on emission and excitation spectra of
Molecular Beacons) or do I need special cameras which are spectrally aware,
to capture and anlayse this information, thanks Samuel, Virologist India

On 11/17/05, Baggerly, ROY G <[hidden email]> wrote:

>
> Did you receive any information from the NIH group? This sounds like
> some of the things I might be interested in and I would like to hear
> what others say. Thanks.
>
> Roy G. Baggerly
> M&PT
> TEL: [phone]
> FAX: [phone]
>
> "It is clearly the perception of failure in existing technology
> that drives inventors, designers, and engineers to modify what
> others may find perfectly adequate, or at least useable."
> Evolution of Useful Things
>
> -----Original Message-----
> From: Simon Rigoulot [mailto:[hidden email]]
> Sent: Friday, November 04, 2005 12:53 AM
> To: [hidden email]
> Subject: Spatial frequency
>
> My name is Simon Rigoulot and I would want to compare groups of pictures
>
> according to their spatial frequency.
> More precisely, I would want, for different bands of spatial frequency,
> and
> after a FFT or a wavelet transformation, to measure the energy of these
> bands of spatial frequency and after that, compare these energies (with
> ANOVA by example).
>
> I Would want to know if it was possible with imageJ and if yes, the way
> to
> obtain that.
>
> Thanks for your attention
>
> Simon Rigoulot
>