Detecting Photographic Forgeries


	Detecting Photographic Forgeries

Kore7

3-17-2007 2:00 PM

1213 views

tags:

photography, photo, photos, image, eyes, news, media, fake, forgery, fraud, politics, propaganda, computer science, digital, photoshop, analysis

Kore7 says:

Automatically detecting manipulated photographs is becoming more and more necessary in today's newsroom.

"The eyes are a partial mirror into the world in which you're photographed," Farid says. If there are two white dots in each eye, there had to have been two separate light sources. So, if a photo shows two dots in one person's eyes and only one dot in another person's eyes, it must have been spliced together from two different originals.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/f7378be0-c72d-4274-94f7-fbc7e46ceaf8/822120C9-8416-4EB3-B6C5-167CC42B97D5/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://blog.sciencenews.org/mathtrek/2007/03/computing_photographic_forgeri.html" href="http://blog.sciencenews.org/mathtrek/2007/03/computing_photographic_forgeri.html" style="font-size: 11px;">blog.sciencenews.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.sciencenews.org/mathtrek/2007/03/computing_photographic_forgeri.html"><P>Last August, a photograph from Reuters appeared in newspapers around the world showing smoke plumes billowing from buildings after an air strike in Beirut. Bloggers soon noticed a strange repeating pattern in the smoke. A portion of the photograph, they said, had been copied and repeated in the picture, exaggerating the amount of smoke and destruction.
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.sciencenews.org/mathtrek/2007/03/computing_photographic_forgeri.html"><TABLE width="1" cellspacing="1" cellpadding="1" border="0"><TBODY><TR><TD><SPAN><IMG alt="f8259_1421.jpg" src="http://www.sciencenews.org/articles/20070317/f8259_1421.jpg" /></SPAN></TD></TR><TR><TD><P align="left" class="caption">Reuters published the photograph on the left on August 5, 2006. The white spirals in the smoke gave it away as a fake. The photograph on the right is the original.<BR /><SPAN>Reuters</SPAN></P></TD></TR></TBODY></TABLE></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.sciencenews.org/mathtrek/2007/03/computing_photographic_forgeri.html"><TABLE width="1" cellspacing="1" cellpadding="1" border="0"><TBODY><TR><TD><SPAN><IMG alt="f8259_2942.jpg" src="http://www.sciencenews.org/articles/20070317/f8259_2942.jpg" /></SPAN></TD></TR><TR><TD><P align="left" class="caption">Different photographers, at different times, took the two photos on the right. Someone pulled the photos from an archive and spliced the image of Jane Fonda into the picture with John Kerry.<BR /><SPAN>Ken Light and Owen Franken</SPAN></P></TD></TR></TBODY></TABLE></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.sciencenews.org/mathtrek/2007/03/computing_photographic_forgeri.html"><TABLE width="1" cellspacing="1" cellpadding="1" border="0"><TBODY><TR><TD><SPAN><IMG alt="f8259_3696.jpg" src="http://www.sciencenews.org/articles/20070317/f8259_3696.jpg" /></SPAN></TD></TR><TR><TD><P align="left" class="caption">From the left, the first and third persons have a single dot in each pupil, while the second and fourth have two dots in each eye. Therefore, the image must be a composite.<BR /><SPAN>Fox Entertainment</SPAN></P></TD></TR></TBODY></TABLE></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/822120C9-8416-4EB3-B6C5-167CC42B97D5/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>