Understand explicit imagery without prolonged exposure
S21 AI Describe helps investigators generate clear, structured descriptions from images and selected video frames. It is built for CSAM, safeguarding and serious crime investigations where teams need to understand visual material, document what is present and reduce unnecessary repeated viewing.
Repeated review is often treated as unavoidable. It doesn't have to be.
Describing explicit imagery increases exposure and strain
Investigators may need to view, interpret and describe disturbing material in detail for safeguarding, intelligence and evidential purposes. When that work depends on repeated manual viewing, the cognitive and emotional burden increases with every image, frame and report.
See how it works in 5 minutes
Join a former law enforcement officer for a practical walkthrough of the tool and features designed to support real-world investigations
Fully Offline & Secure
All analysis runs locally. Sensitive imagery and video never leave your environment.
Designed for investigative reality
Built for safeguarding teams, DFUs, and intelligence analysts — not social media moderation.
No specialist infrastructure required
Runs on existing workstations without servers, cloud services, or complex deployment.
We’re creating an open community of collaboration with other industry experts
S21 VisionX fully supports evidential data exchange with leading digital forensic tools, ensuring seamless integration with your existing workflow. Compatible platforms include X-Ways Forensics, Cellebrite, Magnet Forensics (AXIOM, IEF, Witness), GrayShift, Griffeye, Belkasoft X, Oxygen Forensics, OpenText EnCase, MSAB XRY and XAMN, Exterro, GetData, and many others. With S21 VisionX, you can review, categorise and identify victims efficiently — and easily export results back to your tool of choice for further analysis or reporting.
The Solution
What S21 AI Describe helps investigators do
Generate structured descriptions
Create clear, consistent descriptions from images and selected video frames.
Reduce repeated exposure
Help investigators understand visual content without repeatedly viewing the same disturbing material.
Support case notes and reports
Use generated descriptions to support documentation, review and reporting workflows.
Surface details for further review
Highlight visual details that may support follow-up searches, pattern recognition or investigative reasoning.
Work fully offline
Analyse sensitive material locally without cloud upload or third-party sharing.
How it works
From visual material to structured description
S21 AI Describe helps investigators move from manual visual review to clearer, structured understanding.
Teams can add an image or selected video frame, generate a description, check the output against the source material and use relevant details to support notes, reports or further investigative searches.
Add the image or frame
Start with an image or selected video frame that requires description or review.
Generate a structured description
Produce a clear description of the visible content, including key details for investigator review.
Check and refine
Review the description against the original material and edit where investigator judgement is required.
Use the output
Apply the description to case notes, reports, search terms or further investigative assessment.
Features
Structured description features for investigative review
Description generation
Image description
Selected video frame description
Structured visual summaries
Clear wording for review and documentation
Investigator review
Editable descriptions
Details for follow-up searches
Support for case notes and reports
Investigator judgement retained
Wellbeing support
Reduced repeated exposure
Less prolonged manual viewing
More sustainable review of explicit material
Secure operation
Fully offline analysis
No cloud upload required
Works alongside existing forensic tools
No workflow change required
Investigators should not have to face repeated exposure
Important material should not depend on repeated manual review.
USE CASES
Built for visual material that needs careful description
S21 AI Describe helps investigators create clear, structured descriptions from sensitive images and selected video frames where accuracy, consistency and reduced exposure matter.
CSAM and explicit imagery review
Generate structured descriptions to support review while reducing unnecessary repeated exposure to harmful material.
Safeguarding investigations
Help teams understand visual content faster where early assessment and careful documentation matter.
Serious crime imagery
Support clearer review of sensitive images connected to complex or high-risk investigations.
Images requiring case notes or report wording
Create consistent description text that investigators can check, edit and use in documentation.
Video frames requiring structured description
Describe selected frames so key visual details can be reviewed without replaying footage repeatedly.
Material where repeated viewing should be minimised
Reduce the need to look at distressing content again and again during review and reporting.
Operational Capability
Reduce exposure without losing investigative detail
S21 AI Describe helps investigators understand sensitive images and selected video frames through structured descriptions, reducing unnecessary repeated viewing while keeping review, judgement and control with the investigator.
Image and frame-level description
Generate structured descriptions from still images and selected video frames, helping investigators understand visual material without repeatedly returning to the source.
Structured outputs for review
Produce clear, consistent descriptions that can support case notes, reports, search planning and wider investigative review.
Investigator-controlled editing
Descriptions support professional judgement rather than replacing it. Investigators can check, refine and use the output where it is relevant to the case.
Offline & Secure
Describe sensitive imagery without sending it outside your environment.
S21 AI Describe runs locally, allowing investigators to generate descriptions from sensitive images and selected video frames without relying on cloud services or external tools. It supports controlled review where privacy, security and evidence handling matter.
S21 AI Describe + S21 VisionX
S21 VisionX, where structured understanding operates at investigative scale
AI Describe is integrated within VisionX to support large-scale image and video analysis.
S21 AI Describe
AI Describe is built to support necessary investigative tasks while limiting avoidable cognitive and emotional strain.
S21 VisionX
The offline investigative platform these tools were built inside.
S21 AI Describe was developed and proven inside S21 VisionX and is now available as a standalone tool due to investigator demand.
