Regular readers of this blog have learned about a diverse collection of image forensics techniques which Hany Farid and others have developed over the past decade or more. Yet Fourandsix currently offers just one commercial product featuring just one of these many techniques. Of course, this type of situation is common in technology. Any regular readers of tech blogs have no doubt seen countless articles featuring the latest innovations in research, only to discover that they’ll need to wait years to access those innovations in a product, if indeed the ideas ever get productized at all. Why is it such a bumpy road from research to final product, and what, you might ask, is Fourandsix doing to bring more technology to market?
Welcome to the Fourandsix blog, where you’ll find tips on image forensics techniques and commentary on issues relevant to photo tampering and the responsible use of imaging tools.
Last week I discussed questions surrounding the photo of an accused Iranian spy. At first glance the shadows in the photo seem somewhat odd, but a forensic shadow analysis revealed that the shadows are physically plausible. Here I show how this analysis can be further refined to provide even stronger evidence of this photo’s viability.
Israel’s domestic intelligence service released photos of an accused Iranian spy. Questions have emerged as to the possible authenticity of the photo. At first glance, the shadows in the photo seem somewhat odd.
When the owners of “Must Win” received a photo of their race horse on the roof of their home they were suspicious that it was a prank. A shadow analysis confirms that the photo is probably real.
In Southcentral Alaska, a brown bear runs runs through a crowd of people with a salmon in her mouth. The series of three photos is pretty remarkable and offers a good lesson in the physics and geometry of shadow formation.