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

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.
'

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?

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 we

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

ImageMagick is found he

http://www.imagemagick.org

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...