Optical measurement lab
Pre-flight check · calibrate · measure · send to cross-date
Image
Tools
0°
Click or a to add · drag / ← → to adjust · x split · ⌫ delete · s sapwood · z undo · ? shortcutswheel zoom · drag pan · Tab select · ← → nudge · | snapped · | manual · | sapwood start
Ring widths
0 rings · mean 0.00 mm · min 0.00 mm
Snap or pin boundaries to build the series. Widths update live as you edit.
Start here
Drop a scan or photo of a sanded cross-section below, or open one of the demo specimens above. A four-step guide then walks you through the measurement.
Photo quality check
Load an image to check sharpness, scale and perspective.
Linter demos
Scale
Line lengthmm
Not calibrated
Drop a scan or photo
Sanded / polished surface, mm scale in frame or known scan DPI