Calibration-Free Wound Measurement from a Phone: How Point-n-Capture Works

Wound measurement has always been the weakest link in the chart. Paper rulers round to the nearest half centimeter. Sticker fiducials fall off, bend, or get placed at the wrong angle. Most "AI" imaging apps still require a calibration marker in every shot, which slows the visit and introduces its own errors.

Point-and-Capture wound imaging removes the marker entirely. The clinician points a phone at the wound, captures, and the system returns length, width, area, and border geometry in seconds.

How calibration-free planimetry works

• Depth-aware capture — the phone's depth sensor and camera intrinsics establish real-world scale without a physical reference in the frame.
• Automatic border detection — the imaging agent segments the wound edge from surrounding tissue, then computes planimetric area rather than a length × width rectangle.
• Repeatable geometry — the same wound, captured from slightly different angles across visits, aligns to a shared coordinate system so trending is apples-to-apples.
• Tissue composition — granulation, slough, and eschar percentages are estimated from the same capture, feeding the SOAP note automatically.

Why it matters clinically

• No stickers to stock, place, or dispose of at the bedside.
• No re-shoots because the marker was cropped or glare-blown.
• Measurements flow directly into the healing dashboard so stalled wounds surface before week four.
• Every measurement is time-stamped and tied to the encounter — the kind of evidence WISeR reviewers and Medicare auditors expect.

Where it fits in the visit

One capture drives the imaging record, populates measurement fields in the AI-powered EMR for wound care, and anchors the note the ambient scribe is already writing. The clinician never leaves the exam room to reconcile numbers.

For podiatrists managing diabetic foot ulcers, that means less time on the ruler and more time on the foot.