Ping - The Photo Editing Types.....

http://www.dropbox.com/gallery/8909044/1/LCD?h=b72e25

Noticed this a few times now, but whenever I shoot a picture of a LCD
monitor, when I resize said picture I get a really bad Moire type
interference. Anything I can do to stop this happening ?

See SIF_ISSUE.JPG 4000x3000 and SIF_ISSUE2.JPG 1280x960 in the dropbox
folder above.

I use Paint Shop Pro 8 for basic labeling of photos to send to
suppliers explaining whats bollocksed with their products.

 

If you look at the original it's also got that Moire pattern. I resized
to 1280x960 using the defaults in gimp and it seemed to come out ok.
Maybe just crappy resize filter in PSP.

See http://www.flickr.com/photos/siwilson/5549290555/

 

Because I have the pikey flickr, it's resized the photo again. Perhaps
that's another solution - upload it to flickr and let it resize for you?

 

Picassa does a reasonable job:
http://www.zen202900.zen.co.uk/pics/1191eb7.jpg

 

Ta - all, tried gimp and that did it with far less noise.

eyethangewe

 

You are hit by the Nyquist–Shannon sampling theorem. Reduce the spatial
frequency of the picture (in other words, blur it) before scaling down,
by about the same amount as the scaling. For instance, Gaussian blur 3x3
pixels if you reduce it to about 1/3.

Gaussian blur 3x3, scaled with Sinc: http://cjoint.com/?1dxaeOKrWrn