Point-n-Capture: Markerless Wound Measurement from a Smartphone

Most smartphone wound imaging tools still require a physical marker or calibration sticker in the frame. Point-n-Capture removes that step entirely: the clinician points the phone at the wound, taps once, and gets a calibrated measurement with an AI-detected border.

How markerless measurement works

Instead of relying on a printed HealX marker or a paired sticker for scale, Point-n-Capture uses on-device depth and camera intrinsics to derive real-world distance at the wound surface. The AI border model then segments the wound perimeter directly from the RGB image, producing length, width, area, and perimeter in a single capture.

• No consumables — no stickers to reorder, misplace, or contaminate
• No two-hand setup — one-handed capture at the bedside or in the exam chair
• No re-shoots — if lighting or angle is off, the app flags it before the visit ends
• Longitudinal alignment — subsequent captures re-register to the baseline so trend lines are apples-to-apples

Why calibration shapes the whole workflow

Calibration isn't just an imaging detail. Every downstream step — charting, coding, healing analytics, audit defense — depends on the measurement being trustworthy and repeatable across visits and across clinicians. Marker-based tools introduce variance every time the sticker is placed differently or the marker is out of plane.

Markerless capture standardizes that input, which is what makes structured charting and healing analytics actually reliable. See the full technical walk-through in Calibration-Free Wound Measurement from a Phone: How Point-n-Capture Works.

Where it fits in the WoundScribe stack

Point-n-Capture is the front door to AI-powered wound imaging. The measurement flows directly into the AI-powered EMR for wound care and feeds the healing dashboard, so a single tap at the bedside produces a measurement, a chart entry, and a trend point — with no marker in the frame.