checkDeletion
Description
returns a flag that is tf
= checkDeletion(historyLogic
)true
when at least Md out of
Nd recent updates of the track history logic object
historyLogic
are false
.
returns a flag that is tf
= checkDeletion(historyLogic
,tentativeTrack
,age
)true
when the track is tentative and there are not
enough detections to allow it to confirm. Use the logical flag
tentativeTrack
to indicate if the track is tentative and provide
age
as a numeric scalar.
Examples
Check Deletion of History-Based Logic
Create a history-based logic. Specify confirmation threshold values Mc and Nc as the vector [2 3]. Specify deletion threshold values Md and Nd as the vector [4 5].
historyLogic = trackHistoryLogic('ConfirmationThreshold',[2 3], ... 'DeletionThreshold',[4 5])
historyLogic = trackHistoryLogic with properties: ConfirmationThreshold: [2 3] DeletionThreshold: [4 5] History: [0 0 0 0 0]
Initialize the logic, which records a hit as the first update to the logic. The confirmation flag is false
because the number of hits is less than two (Mc).
init(historyLogic) history = output(historyLogic); checkConfirmation(historyLogic)
ans = logical
0
delFlag = checkDeletion(historyLogic); disp(['History: [',num2str(history),']. Deletion Flag: ',num2str(delFlag)]);
History: [1 0 0 0 0]. Deletion Flag: 1
Update the logic with a hit. The confirmation flag is true
because two hits (Mc) are counted in the most recent three updates (Nc).
hit(historyLogic) history = output(historyLogic); checkConfirmation(historyLogic)
ans = logical
1
delFlag = checkDeletion(historyLogic); disp(['History: [',num2str(history),']. Deletion Flag: ',num2str(delFlag)]);
History: [1 1 0 0 0]. Deletion Flag: 0
miss(historyLogic) history = output(historyLogic); checkConfirmation(historyLogic)
ans = logical
1
delFlag = checkDeletion(historyLogic); disp(['History: [',num2str(history),']. Deletion Flag: ',num2str(delFlag)]);
History: [0 1 1 0 0]. Deletion Flag: 0
miss(historyLogic) history = output(historyLogic); delFlag = checkDeletion(historyLogic); checkConfirmation(historyLogic)
ans = logical
0
disp(['History: [',num2str(history),']. Deletion Flag: ',num2str(delFlag)]);
History: [0 0 1 1 0]. Deletion Flag: 0
Check Deletion of Tentative Track
Create a history-based logic. Specify confirmation threshold values Mc and Nc as the vector [2 3]. Specify deletion threshold values Md and Nd as the vector [4 5].
historyLogic = trackHistoryLogic('ConfirmationThreshold',[2 3], ... 'DeletionThreshold',5)
historyLogic = trackHistoryLogic with properties: ConfirmationThreshold: [2 3] DeletionThreshold: [5 5] History: [0 0 0 0 0]
Initialize the logic, which records a hit as the first update to the logic. Then, record two misses.
init(historyLogic) miss(historyLogic) miss(historyLogic) history = output(historyLogic)
history = 1x5 logical array
0 0 1 0 0
The confirmation flag is false
because the number of hits in the most recent 3 updates (Nc) is less than 2 (Mc).
confirmationFlag = checkConfirmation(historyLogic)
confirmationFlag = logical
0
Check the deletion flag as if the track were not tentative. The deletion flag is false
because the number of misses in the most recent 5 updates (Nm) is less than 4 (Mc).
deletionFlag = checkDeletion(historyLogic)
deletionFlag = logical
0
Recheck the deletion flag, treating the track as tentative with an age of 3. The tentative deletion flag is true
because there are not enough detections to allow the track to confirm.
tentativeDeletionFlag = checkDeletion(historyLogic,true,3)
tentativeDeletionFlag = logical
1
Input Arguments
historyLogic
— Track history logic
trackHistoryLogic
Track history logic, specified as a trackHistoryLogic
object.
tentativeTrack
— Track is tentative
false
| true
Track is tentative, specified as false
or
true
. Use tentativeTrack
to indicate if the
track is tentative.
age
— Number of updates
numeric scalar
Number of updates since track initialization, specified as a numeric scalar.
Output Arguments
tf
— Track can be deleted
true
| false
Track can be deleted, returned as true
or
false
.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Version History
Introduced in R2021a
See Also
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