IEDAL2: Image Edit Detection and Localization Challenge (Part 2)

• Detection of images generated by state-of-the-art generative models (image/text-to-image, diffusion, etc.)
• Detection & localization of object additions and removals
• Identification of inpainted or altered regions
• Image classification: authentic vs. partially synthetic vs. fully synthetic

By anchoring the challenge in subtle manipulations, we aim to drive innovation in detection methods that move beyond binary detection toward fine-grained reasoning about where and how an image was altered.

Register your team to get started. The principal investigator fills out the registration form -- organizers manually approve and issue your access token.

Evaluations for this challenge will run on the Dyff Platform hosted by UL DSRI.

Register

Part 2 of the challenge is now open....

Challenge Part 1 overview and results presented at SynRDinBAS Workshop @ WACV 2026.

The principal investigator of each participating team should fill out the registration form. The challenge organizers must manually approve your registration. After approval, you will receive an access token for the Dyff Platform that will allow you to manage your team information, make submissions, and review non-public results and system logs.

Submissions must be in the form of a containerized web service that implements a standard JSON API over HTTP. You will submit a runnable Docker image and, optionally, a volume of data files to be mounted in the running Docker container.

We provide an example submission repository that contains a specification and reference implementation of the required interface as well as step-by-step instructions for creating a new submission. You can use this code as a starting point, but you don't have to.

Submitted systems will run in a virtual machine with access to the following resources:

• GPU: 1x Nvidia L4
• CPU: 4
• Memory: 24Gi

Submit your detector model for evaluation. You can build your submission package yourself and submit it using a CLI tool.

Teams will be allowed a limited number of submissions per day.

This challenge uses novel, private datasets for evaluation. To maximize the validity of the performance measurements:

• No training data will be provided. Participants may train on any data they have rights to use.
• Evaluation data will not be published. Organizers will publish general descriptions of the collection methodology only.
• Small data samples are provided only to validate submission flow and are not representative of the actual evaluation data content.

The Smoke Test allows participants to test the submission process, system behavior, and evaluation flow before the release of official competition tasks.

It is not intended to reflect the complexity, realism, or diversity of the final datasets.

Goals:

• Verify submission pipeline (upload, evaluation, logging, etc.)
• Allow organizers to validate infrastructure and parameters
• Familiarize teams with submission mechanics before full competition

This second Main Task evaluates the performance of synthetic image detectors on three different capabilities -- detection, classification, and localization. The task dataset consists of images in 4 different categories:

• 0 = Natural -- A natural (un-manipulated) image
• 1 = FullySynthesized -- The entire image is synthetic. (New) includes images from the latest SOTA image-generation models.
• 2 = LocallyEdited -- The image was manipulated locally using traditional image processing methods (e.g., in-painting or splicing)
• 3 = LocallySynthesized -- The image was manipulated locally by synthesizing content
• 4 = LocallyInstructSynthesized -- (New) The image was manipulated locally by instruct-based synthesized content (e.g. text-based image editing models)

Each image contains manipulations from at most one category.

Detection performance is the detector's ability to detect image manipulation of any kind. We formulate this as a binary classification problem of discriminating Natural images vs. all other classes.

Classification performance is the detector's ability to classify images by the type of manipulation they exhibit, if any. We formulate this as a multi-class classification problem.

Localization performance is the detector's ability to determine where the image has been manipulated. We formulate this as an object detection task with a single kind of object -- namely, manipulated pixels.

For each capability, we define one primary score, which is the score that determines the ranking of challenge submissions in that category. We also define a number of secondary scores that may provide additional insight into detector performance but that do not contribute to rankings in the challenge.

Submissions will be evaluated on private data created for this challenge, and the evaluations will be run on private computing infrastructure. Evaluation data will not be released publicly. The organizers will publish a description of the dataset creation methodology.

The competition will maintain both a public leaderboard and a private leaderboard.

Datasets may differ between the two to ensure fair and unbiased evaluation.

Datasets may differ between the two to ensure fair and unbiased evaluation.

1. Both public and private leaderboards will be maintained.
2. The private leaderboard will serve as the basis for final ranking.

Participants will be limited in the number of daily submissions.

1. Participants agree not to publicly compare results with others until those results are published outside the conference venue.
2. Participants are free to publish and use their own results independently.

1. Use of provided computing resources for any non-challenge-related purposes is prohibited.
2. Participants should take appropriate precautions to protect their authorization credentials (API tokens, etc) and report account compromise or misuse to the challenge organizers immediately.

Top performers may be eligible for research grants and travel support to WACV for invited teams.

1. All rules and guidelines issued by the organizers must be followed.
2. Failure to comply may result in disqualification or exclusion from future challenges.

[email protected]

Discord Server | Invite Link

Example Submission Repository

https://docs.dyff.io