Description

This OpenCV based program has been designed to measure the internal diameter of rings using a web camera. Before the measurement the system should be calibrated using a checkered picture.

Demo video

Calibration

Calibration is required for two purposes:

Finding relation between pixel measure and real world distance.
Compensation of camera distortion.

Background correction

Measurement

After internal ring contour recognition, it is approximated to a circle using the LMS method. The diameter of the circle is the measured value.

Keywords