Original oder Fälschung? Seminar Bildforensik [SemForensik]
Image manipulations became an everyday problem with the broad availability of cameras and professional image processing software. Nevertheless, a picture is still considered as a proof for an event in court, in the press, or in scientific publications.
Journalists and authorities have therefore a big interest in validating the authenticity of an image or to be able to pinpoint
the location that was manipulated.
In this seminar, we study selected attacks on manipulated images, and
demonstrate their performance with small demo programs.
After an introductory presentation we fix dates and topics for each participant.
At the end of this seminar, each participant can use the collected code as a "mini forensics toolbox".
Some methods for forensic analysis of the images are:
- Finding inserted elements via noise pattern analysis
- Inconsistencies in illumination and shadow direction
- Inconsistencies in JPEG compression artifacts
- Sensor noise: stochastic fingerprints of digital cameras
- Finding inserted elements via interpolation artifacts
Dates & Rooms:
- Wednesday, June 22, 8am: JPEG I by Patrick and Bowei: room 0.154-115, Cauerstr. 7/9 (EEI building)
- Wednesday, July 6, 8:30am: JPEG II by Bowei, Noise residuals by Patrick & Christian: room 0.154-115, Cauerstr. 7/9 (EEI building)
- Friday, July 8, 14:30pm: PRNU by Benedikt, Lukas and Burkhard, Resampling by Ludwig, and Geometry by Michael: room 01.151-128, Cauerstr. 11 (new CS building)
- Friday, July 15, 4pm: Video by Tilman and Stefan: room 0.151-128, Cauerstr. 11 (new CS building)
If you have any questions, please send an email to Christian Riess (firstname.lastname fau de).
- A successful participation includes:
- Prototypical implementation & testing of a method
- 25 minutes presentation
- 2-page IEEE-style summary
- "Active" participation in the discussion
- The grade is formed by the first three points, weighted 4-4-2, i.e.,
grade = (implementation*0.4+presentation*0.4+summary*0.2).
- Note that you have to pass all three components individually. For example, it is not possible to pass without handing in the summary, even though it has the smallest contribution to the final grade.