The document summarizes the work of the MeVer team at the Centre for Research and Technology Hellas (CERTH) Information Technologies Institute (ITI) Multimedia Knowledge and Social Media Analytics Lab (MKLab). The MeVer team develops tools and services for detecting media-based disinformation, including tools for context aggregation and analysis, near duplicate detection, image forensics, deepfake detection, location estimation, and network analysis and visualization. The team has published several papers and book chapters and collaborates with other researchers and experts on projects like InVID-WeVerify to help verify user-generated images and videos.

1. Centre for Research and Technology Hellas (CERTH)
Information Technologies Institute (ITI)
Multimedia Knowledge and Social Media Analytics Lab
(MKLab)
Olga Papadopoulou, Nikos Sarris, Symeon Papadopoulos
MeVer tools for disinformation detection

2. Centre for Research and Technology Hellas (CERTH)
Information Technologies Institute (ITI)
Multimedia Knowledge and Social Media Analytics Lab
(MKLAB)
2
Εstablished in 2000:
• 5 institutes, >700 employees
• 1200 projects, 1100 international collaborations
• Among top-10 EU institutions in attracting competitive
research projects
> 175 EU projects
> 100 national and industrial projects
ITI is the largest institute of CERTH with >400 employees
Key areas: Multimedia analysis, AI, Computer Vision, Cognitive
systems, Reasoning, Social media analysis, VR, AR, HCI
> 100 members
> 100 EU and National research projects
180+ journals, 12 books, 60+ book chapters, 550+ conference
papers
Key areas: multimedia analysis, indexing and retrieval, social
media and big data analytics, knowledge structures, reasoning
and personalization for multimedia applications, eHealth

3. 3
MeVer @ MKLab @ CERTH/ITI
We are developing technologies and services
for the detection of media-based
disinformation
Publications:
11 Journals
32 Conference papers
4 book chapters
Team:
7 Key team members
Valuable contributions of past colleagues
Collaboration with numerous researchers and experts
Projects

4. InVID-WeVerify Verification Plugin
https://weverify.eu/verification-plugin/
>40.000 users all over the world
CAA and image forensics tools are integrated as components of the Verification
plugin.

5. Context Aggregation and Analysis
A tool that aims to facilitate the verification of user-generated images and
videos.
Platform APIs
CAA
COMPONENTS
Verification
report
https://caa.iti.gr
Provide URL Start
Verification
Select media type:
Image or Video

6. Near Duplicate detection
A tool that aims to retrieve relevant images based on the visual content and videos
based on the visual and audio content.
Query Video
Complementary
Scene Video
Duplicate
Scene Video
Incident
Scene Video
http://ndd.iti.gr/video_search/

7. Image Forensics
https://mever.iti.gr/forensics/
A tool that aims to detect traces of forgeries in images.
Provide URL
Start
Verification
Upload a photo

8. DeepFake detection
https://mever.iti.gr/deepfake/
A tool that aims to detect face manipulations in images and videos.

9. Location Estimation
https://mever.iti.gr/location/
A tool that aims to detect the location depicted in an image based on
the visual content.
Provide URL
Start Extraction
Upload a photo

10. Network analysis and visualization
https://networkx.iti.gr/
A tool that aims to assist the user to delve into online social media conversations, in
order to gain insights about how information is spreading in the network, and also
provide intuition about the groups that communicate more with each other and form
communities.

11. Thank you for your attention!
https://twitter.com/meverteam
Follow us on Twitter:
Media Verification team website
https://mever.iti.gr/web/
Contact us: Olga Papadopoulou - olgapapa@iti.gr
Symeon Papadopoulos – papadop@iti.gr