ELECTRONIC COMPASS CALIBRATION BASED ON VISUAL CODE

摘要

In a disclosed embodiment, a system includes a digital imaging device, an electronic compass (e-compass), and a processor coupled to the digital imaging device and the e-compass. The processor is operable to execute instructions that cause the image device to scan a visual code, read a yaw angle from the visual code, cause the e-compass to obtain magnetic field measurements, estimate a yaw angle based on the magnetic field measurements, compare the yaw angle read from the visual code and the estimated yaw angle to determine a quality factor; and determine whether the e-compass is calibrated based at least partially upon the quality factor.