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Nimble Challenge Evaluation 2018
The Nimble Challenge 2018 (NC2018) Evaluation is the second annual evaluation to support research and help advance the state of the art for image and video forensics technologies – technologies that determine the region and type of manipulations in imagery (image/video data) and the phylogenic process that modified the imagery. The NC2018 is currently being designed building of experience from the NC2017 Evaluation. We expect to continue support for the following tasks:
- Image Manipulation Detection and Localization (Image MDL)- Given a single probe image, detect if the probe was manipulated and provide localization mask(s) indicating where the image was modified.
- Splice Detection and Localization (Image MDL) - Given two images, detect if a region of a donor image has been spliced into a probe image and, if so, provide two masks indicating the region(s) of the donor image that were spliced into the probe and the region(s) of the probe image that were spliced from the donor.
- Provenance Filtering (PF) - Given a probe image and a set of images representing a world (i.e., large 1M+ images), return the top N images from the world data set which contributed to creating a probe image.
- Provenance Graph Building (PGB)- Produce a phylogeny graph for a probe image
- Variation 1: End-to-End Provenance - Provenance output produced by processing the large world data set (1M+ images) of images.
- Variation 2: Oracle Filter Provenance - Provenance output produced from a NIST-provided small (200 image) collection of images.
- Video Manipulation Detection (Video MDL) - Detect if the probe video was manipulated.
Prospective Nimble participants can subscribe to the Nimble mailing list for announcements by sending a request to the contact below and can take part in the evaluation by completing the registration and license agreements below.
There are many exciting changes being planned for the evaluation cycle: more development resources, a scoring server with a leaderboard style evaluation, manipulation operation-specific system evaluations which allows research to focus on one specific form of manipulations, and detailed, automatic diagnostics of system success/failures.
Tentative Schedule
| Dates | Development Resources |
|---|---|
| Now |
|
| August 2017 |
|
| December 2017 |
|
| April 2018 |
|
| June 2018 |
|
| June 18-23 |
|
Documentation
The planning for NC '18 has just begun. Please share the MFC’18 Call for Participation Flyer with your colleagues. The anticipated changes between NC '17 and NC '18 to be minimal. Please see the NC '17 Evaluation Plan to begin understanding the structure of the evaluation tasks, data, and metrics.
Data Resources
By signing up for the evaluation, you’ll be getting a wealth of data resources to conduct your media forensics research. The data will be designated as either: (1) a development resource that will be accessible at signup, (2) past year evaluation resources provided after completing a dry run evaluation, and (3) the NC’18 evaluation resources during the formal evaluation in April ’18. Here’s a quick summary of the resources:
Data Set Type | Data Set Name | Number of Forensic Probes (true manipulations and non-manipulations) | World Data Set Size | Reference Annotations | Supported Tasks |
|---|---|---|---|---|---|
| Development | NC2016 – Both Nimble Science and Nimble Web | 624 | Full | MDL | |
| NC’17 Development Image Data | 3,500 | 100,000 | Full | All | |
| NC’17 Development Video Data | 213 | Full | All | ||
| NC’18 Development Image and Video Data | TBD | TBD | Full | TBD | |
| Past Evaluations | NC’17 Evaluation Images | 10,000 | 1,000,000 | Full for 1/3 subset | All |
| NC’17 Evaluation Videos | 1,000 | Full for 1/3 Subset | All | ||
| NC ‘18 Evaluation | NC’18 Evaluation Images | 50,0000 | 5,000,000 | ||
| NC’18 Evaluation Videos | 5,000 |
Evaluation Tools
NIST provided tools are described in the Evaluation Infrastructure Setup Instructions.