Digital Image Ballistics

written by Babak on July 15, 2013 in Uncategorized with no comments

We are often times asked what is digital image ballistics which is one of the services provided by the Verifeyed Professional Edition.

Imagine that there is a set of digital images, and you need to find out if they have been captured by a particular smartphone or camera belonging to somebody. This often happens in forensic investigation, in law enforcement, insurance, financial or the media industry. For example, let’s say that somebody claims they have captured some photos and you need to verify it by testing to see if photos are really captured by his or her camera or smartphone, or there is a discovery of some digital images and you need to verify that those photos have been captured by that person’s camera.
Our cutting edge scientific technology makes this possible. The procedure of linking a digital image to a particular camera or smartphone is called image ballistics.

Image ballistics also easily differentiates between cameras and smartphones of the same make and model. Each imaging device has a sensor. An image sensor is a device that converts light, or in other words, the optical image, into an electronic signal. Most currently used sensors are CCD or CMOS sensors consisting of millions of small elements called pixels. Due to variations in the pixels size and material properties, each pixel also has its own behavior and small variations. This behavior is unique and can be used to create a so called fingerprint of that sensor. These fingerprints are used in order to carry out ballistic tests and inspect if a digital image has been taken by that particular camera.