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wecanfindtheestimationprecisionandrecallrateisdecidedbythesizeofthemarkerandtherelativedistance.InTable1,generally,themoretherelativedistanceisgettingsmaller,therecallrateisgettinghigher.However,whenthealtitudewillgetlow,thebigmarkerscannotbedetected.InTable2,theestimationprecisionisbetterwhenthesizeofthemarkeris...
Table 1. Distance and angular measurement mean errors with optical cameras detecting the ArUco-type artificial marker sensors. 3.2. Accuracy of Angle Measurement The results are shown in Table 1. The accuracy of the navigation system based on detecting non-natural markers by optical cameras to as...
In addition, the distance d𝑖di from the center of gravity of the ArUco numbered 𝑖i to the optical axis is used as the influence factor of the measurement noise covariance caused by different positions of ArUco in the image frame. Before the operation of the navigation system and after ...