Common Areas
Choose common-area views where hands and held objects are visible without close-up identification.
Contraband Phone Detection in Prisons
A visible mobile device in a controlled area can require staff review. StreamVLM™ can surface the frame and camera context without deciding who owns the device or why it is present.
The Visible Condition
Give the Operator a Frame to Review
The condition in scope is a person visibly holding or using a mobile phone in a selected correctional-facility area. It is a visible scene detail, not a diagnosis, a conclusion about intent, or an automatic decision.
In StreamVLM™, an authorized operator writes a prompt such as “Alert when a person is using a mobile phone in the common area.” The model evaluates selected live frames against that prompt and sends a match, camera, location, and time into the IREX event workflow for human review.
StreamVLM™ runs on a GPU node in the customer instance. Each prompt has its own confidence threshold, alert cooldown, event type, and camera selection.
Explore StreamVLM Prompt DetectorsWhere It Helps
Set the Prompt Where the Condition Matters
Recreation Yards
Let authorized staff review the frame against facility policy and the local situation.
Controlled Corridors
Use the resulting event as a review aid, not as proof for disciplinary action.
Illustrative Camera Frames
What the Operator Reviews
These illustrative frames show the kind of visible condition a prompt can surface. They are not real incidents, deployments, or proof of detection accuracy.
Mobile device
In a Common Area
Staff review the frame in context before applying facility procedure.
Mobile device
A Device in Hand
The prompt is limited to the visible object and posture in the selected view.
Mobile device
A Reviewable Frame
The event does not label the person or infer why the device is present.
From Prompt to Action
A Review Workflow for This Condition
- 01
Select Controlled Common-Area Views
Write a concise prompt for a person visibly holding or using a mobile phone in a selected correctional-facility area, then select the cameras and times where the condition warrants attention.
- 02
Review the Object and Surrounding Activity
Open the event with its camera, location, time, and available video context. Confirm what is visible before treating the match as actionable.
- 03
Apply the Facility’s Authorized Search or Response Procedure
The authorized team applies the local procedure. StreamVLM supplies a review cue; it does not decide the response.
Limits to Test
Validate It on the Actual Cameras
- Scene Context
- A phone-sized object, staff device, or authorized use can match the prompt.
- Camera Fit
- Hands and the device need to be visible at a useful scale without occlusion.
- Human Decision
- A frame does not prove ownership, contraband status, or a policy violation.
FAQ
Does a visible phone prove contraband?
No. A frame can show a phone-like object or visible device use. Staff determine authorization and any policy response under facility rules.
Can StreamVLM confirm mobile device in corrections?
No. It reports a match to the visible condition in the prompt. An operator reviews the frame and local context before deciding what it means.
How should a team tune the prompt?
Start with representative cameras, define what makes a useful alert, then adjust the camera selection, confidence threshold, and alert cooldown during a camera-specific pilot.
Is there a published accuracy figure for this use case?
IREX does not publish a universal accuracy figure for this prompt. Image quality, camera angle, lighting, occlusion, and the local definition of a useful alert all affect results.
Evaluate Visible-Device Alerts in Context
Pilot in one common area and agree how staff will review the frame before any further action is considered.