Scientific Misconduct - Photo Manipulation

Photo Manipulation

Compared to other forms of scientific misconduct, image fraud (manipulation of images to distort their meaning) is of particular interest since it can frequently be detected by external parties. In 2006, the Journal of Cell Biology gained publicity for instituting tests to detect photo manipulation in papers that were being considered for publication. This was in response to the increased usage of programs by scientists such as Adobe Photoshop, which facilitate photo manipulation. Since then more publishers, including the Nature Publishing Group, have instituted similar tests and require authors to minimize and specify the extent of photo manipulation when a manuscript is submitted for publication. However there is little evidence to indicate that such tests are applied rigorously. One Nature paper published in 2009 has subsequently been reported to contain around 20 separate instances of image fraud.

Although the type of manipulation that is allowed can depend greatly on the type of experiment that is presented and also differ from one journal to another, in general the following manipulations are not allowed:

• splicing together different images to represent a single experiment
• changing brightness and contrast of only a part of the image
• any change that conceals information, even when it is considered to be aspecific, which includes:
  • changing brightness and contrast to leave only the most intense signal
  • using clone tools to hide information
• showing only a very small part of the photograph so that additional information is not visible