192results about How to "The estimate is accurate" patented technology

The embodiment of the invention provides a PHD (Probability Hypothesis Density) method for multi-target tracking in an uneven clutter environment, and relates to the field of the intelligent information processing. The method can improve the accuracy of the calculated result under the condition that the calculating amount is reduced. The method comprises the following steps: if the surveillance region is a sparse clutter region, the standard PHD can be directly predicted and updated to obtain estimated target amount and target state; if the surveillance region is an intensive clutter region, convex hulls are searched to determine a clutter region; when the PHD is predicted gradually at different moment, return waves not contained in the clutter region are selected for calculation ; when the PHD is updated, the return waves of which the real target measurement exactly drops into the clutter region are added; Gauss components in the posteriori intensity are cut and merged to obtain the target intensity; then, the weight sum of all the Gauss components in the target intensity are calculated to obtain estimated target amount in the surveillance region; the Gauss components with weight greater than Tau in the target intensity are extracted to be in the estimated target state.