mergeScores

Update track score by track merging

Since R2018b

Syntax

mergeScores(scoreLogic1,scoreLogic2)

Description

mergeScores(scoreLogic1,scoreLogic2) updates the score of scoreLogic1 by merging the score with the score of scoreLogic2. Score merging increases the score of scoreLogic1 by log(1+exp(score2-score1)).

Examples

Merge Score Logics

Create a score logic using the default confirmation and deletion thresholds. Initialize the score logic.

scoreLogic1 = trackScoreLogic;
volume = 1.3; % Volume of a sensor detection bin
beta1 = 1e-5;   % New target rate in a unit volume
init(scoreLogic1,volume,beta1);
disp(['Score and MaxScore of ScoreLogic1: ', num2str(output(scoreLogic1))])

Score and MaxScore of ScoreLogic1: 2.4596      2.4596

Create a copy of the score logic.

scoreLogic2 = clone(scoreLogic1);

Specify the likelihood that the detection is assigned to the track, the probability of detection (pd) and the probability of false alarm (pfa). Update the second score logic with a hit.

likelihood = 0.05 + 0.05*rand(1);
pd = 0.8;
pfa = 1e-3;
hit(scoreLogic2,volume,likelihood,pd,pfa)
disp(['Score and MaxScore of ScoreLogic2: ', num2str(output(scoreLogic2))])

Score and MaxScore of ScoreLogic2: 7.0068      7.0068

Merge the score of scoreLogic1 with the score of scoreLogic2. The score of scoreLogic2 is larger, therefore the merged score of scoreLogic1 increases.

mergeScores(scoreLogic1,scoreLogic2)
disp(['Score and MaxScore of merged ScoreLogic1: ', num2str(output(scoreLogic1))])

Score and MaxScore of merged ScoreLogic1: 7.0173      7.0173

Input Arguments

scoreLogic1 — Track score logic to update

trackScoreLogic object

Track score logic to update, specified as a trackScoreLogic object.

scoreLogic2 — Reference track score logic

trackScoreLogic object

Reference track score logic, specified as a trackScoreLogic object.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2018b