"The research is based on a survey of 45 industry professionals from 15 countries [...] The principal finding is that there is a de facto global consensus on how media organizations understand the manipulation ofimages. Manipulation is seen as involving material changes to an image through the addition or subtraction of content, and is always deemed unacceptable for news and documentary pictures. Manipulation is therefore a specific form of processing, where the material change to the image through the addition or subtraction of element(s) is designed to deceive or mislead the reader/viewer. Adjustments (such as limited cropping, dodging and burning, toning, color adjustment, conversion to grayscale) to photographs are accepted. These are usually described in terms of“minor“changes being permitted while “excessive“ changes are prohibited." (Executive summary)