Winter Flying 12 - PBY-ColdBay-Aleutians.jpg (1/1)

[Mitchell Holman[_8_]]

[Mitchell Holman[_8_]]

Charles Lindbergh > wrote in
:

> On Thu, 12 Feb 2015 07:31:59 -0600, Mitchell Holman >
> wrote:
>
> Oh geez! I can't begin to imagine how painful that must
> be......sigh....
>


Women don't appreciate what having your
nads in freezing water like. If there was any
talk about Alaska being one of the "cushy" war
fronts I hope pictures like this dispelled it...

[Frank Colossi]

On 02/12/2015 08:31 AM, Mitchell Holman wrote:

>
>

A great photo, but the presence of the low frequency noise is a bit
annoying and detrimental.

Attached is the image after being filtered in the frequency domain
using FFT techniques. The result is a nearly complete removal of
the noise allowing the details to be better appreciated.
'

[Mitchell Holman[_8_]]

Frank Colossi > wrote in news:mbk74l02p08
@news3.newsguy.com:

> On 02/12/2015 08:31 AM, Mitchell Holman wrote:
>
> >
> >
>
> A great photo, but the presence of the low frequency noise is a bit
> annoying and detrimental.
>
> Attached is the image after being filtered in the frequency domain
> using FFT techniques. The result is a nearly complete removal of
> the noise allowing the details to be better appreciated.


What software does that?

[Frank Colessi]

On Mon, 16 Feb 2015 13:44:26 -0600, Mitchell Holman wrote:

>
> What software does that?
>

I used the "notch" script from Fred Weinhaus's ImageMagick
scripts:

http://www.fmwconcepts.com/imagemagick/notch/index.php

The script needs a lot of tuning via the parameters to work
well and therefore you should a good background in 2D FFT.

I believe that Photoshop has FFT plugins available but these
plugins require manual processing. The "notch" script does
everything automatically.

In case you want to try it, the parameters I used for the
"notch" script were:

notch -r 7 -t 9 -c 200 -v 0 -h 100 -o 0 PBY-ColdBay-Aleutians.jpg

ImageMagick is found here:

http://www.imagemagick.org