SPEED-BASED TRAJECTORY REDUCTION METHOD AND DEVICE FOR REDUCING TRAJECTORY DATA ACCORDING TO SPEEDS OF TRAJECTORY POINTS
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United States of America Patent
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Issued Date -
Oct 13, 2022
app pub date -
Apr 6, 2022
filing date -
Apr 7, 2021
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Abstract
The speed-based trajectory reducing method and device can be used to obtain trajectory data of a trajectory, obtain the speed of each trajectory point of a plurality of trajectory points of the trajectory data, determine at least one anchor point from the plurality of trajectory points according to the speeds of the plurality of trajectory points, divide the trajectory into at least one trajectory segment according to the at least one anchor point, perform downsampling with a plurality of trajectory points of each trajectory segment to generate a downsampling result, and delete some trajectory points and retain at least the at least one anchor point to update the trajectory data. By deleting the trajectory points and appropriately retaining information of speed, the amount of data stored, processed and transmitted can be reduced while maintaining sufficient accuracy.
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