New method debunks claims that Apollo 11 lunar landing photo is fake
Dartmouth and UC Berkeley researchers have developed new software to detect faked photos, using a geometric algorithm to locate inconsistent shadows that are not obvious to the naked eye.
The new method is a significant step in the field of digital forensics, which national security agencies, the media, scientific journals and others use to differentiate between authentic images and computerized forgeries.
The study, titled “Exposing Photo Manipulation with Inconsistent Shadows,” was presented last week at the Association for Computing Machinery‘s SIGGRAPH conference and is to be published in the journal ACM Transactions on Graphics in September.
The new forensic method analyzes a variety of shadows in an image to determine if they are physically consistent with a single illuminating light source. This allows a forensic analyst to determine if a photo is physically plausible or the result of image fakery. This method has, for example, debunked the claims that the lighting and shadows in the famous 1969 moon landing photo are fake.
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Detecting fake photos
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