March 13, 2013, 4:44 PM — Photographers turning to social networks like Facebook and Twitter to promote their work may be losing the legal rights to their photos because the sites are deleting the images' metadata.
Those sites, in addition to Flickr, are among some of the largest social networks that delete the identifying data at various stages of the image upload and download process, according to the results of a survey released Tuesday by the International Press Telecommunications Council, a worldwide consortium of news agencies based in London.
The deletion of such data is a problem for professional photographers because the metadata often includes key information such as who owns the image's copyright, the photographer's name, captions and other descriptive data.
If these data disappear, the floodgates are open for unauthorized use of photographers' photos, IPTC claims.
"A social networking site is only as good as the information its members choose to share," said Michael Steidl, IPTC managing director, in a statement. "If users provide rights data and descriptions within their images, these data shouldn't be removed without their knowledge," he said.
Some sites, for instance, may have policies in place requiring that they remove the information to speed up the download time for viewing the images, which "may make sense for the service, but not for users of their service who are interested in protecting their intellectual property," said a post on Controlledvocabulary.com, an image rights group that assisted in conducting the survey.
On both Facebook and Flickr, survey testers found that while the metadata was more or less retained upon upload, it disappeared when images are either saved locally or downloaded into other photo management software.
Image metadata was also deleted when saving a photograph locally after posting it on Twitter, the study showed.
Google+ and Tumblr, on the other hand, performed better on the test. The metadata for images hosted on Google+ remained intact for every test that was performed.
Image metadata has legal implications too in light of proposed "orphan works" legislation, which would make it easier for other people to use and profit from photographs that don't have certain identifying information, such as contact information or copyrights, attached to them.