%%?Tracking?Pedestrians?from?a?Moving?Car
%
%?This?example?shows?how?to?track?pedestrians?using?a?camera?mounted?in?a
%?moving?car.
%
%?Copyright?2014?The?MathWorks?Inc.

%%?Overview
%?This?example?shows?how?to?perform?automatic?detection?and?tracking?of
%?people?in?a?video?from?a?moving?camera.?It?demonstrates?the?flexibility
%?of?a?tracking?system?adapted?to?a?moving?camera?which?is?ideal?for
%?automotive?safety?applications.?Unlike?the?stationary?camera
%?example?sed-multiple-object-tracking.html?The?Motion-based
%?Multiple?object?Tracking>?this?example?contains?several?additional?
%?algorithmic?steps.?These?steps?include?people?detection?customized?
%?non-maximum?suppression?and?heuristics?to?identify?and?eliminate?false?
%?alarm?tracks.?For?more?information?please?see?
%?jectTracking‘）?Multiple?object?Tracking>.
%
%?This?example?is?a?function?with?the?main?body?at?the?top?and?helper?
%?routines?in?the?form?of?
%??
%?below.

function?PedestrianTrackingFromMovingCameraExample（）

%?Create?system?objects?used?for?reading?video?loading?prerequisite?data?file?detecting?pedestrians?and?displaying?the?results.
videoFile???????=?‘vippedtracking.avi‘;
scaleDataFile???=?‘pedScaleTable.mat‘;?%?An?auxiliary?file?that?helps?to?determine?the?size?of?a?pedestrian?at?different?pixel?locations.

obj?=?setupSystemobjects（videoFile?scaleDataFile）;

%?Create?an?empty?array?of?tracks.
tracks?=?initializeTracks（）;?

%?ID?of?the?next?track.
nextId?=?1;?

%?Set?the?global?parameters.
option.ROI??????????????????=?[12401280480];?%?A?rectangle?[x?y?w?h]?that?limits?the?processing?area?to?ground?locations.
option.scThresh?????????????=?0.3;??????????????%?A?threshold?to?control?the?tolerance?of?error?in?estimating?the?scale?of?a?detected?pedestrian.?
option.gatingThresh?????????=?0.9;??????????????%?A?threshold?to?reject?a?candidate?match?between?a?detection?and?a?track.
option.gatingCost???????????=?100;??????????????%?A?large?value?for?the?assignment?cost?matrix?that?enforces?the?rejection?of?a?candidate?match.
option.costOfNonAssignment??=?10;???????????????%?A?tuning?parameter?to?control?the?likelihood?of?creation?of?a?new?track.
option.timeWindowSize???????=?16;???????????????%?A?tuning?parameter?to?specify?the?number?of?frames?required?to?stabilize?the?confidence?score?of?a?track.
option.confidenceThresh?????=?2;????????????????%?A?threshold?to?determine?if?a?track?is?true?positive?or?false?alarm.
option.ageThresh????????????=?8;????????????????%?A?threshold?to?determine?the?minimum?length?required?for?a?track?being?true?positive.
option.visThresh????????????=?0.6;??????????????%?A?threshold?to?determine?the?minimum?visibility?value?for?a?track?being?true?positive.

%?Detect?people?and?track?them?across?video?frames.
cont?=?~isDone（obj.read

?屬性????????????大小?????日期????時間???名稱
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?????文件???????26118??2015-04-24?16:37??PedestrianTrackingFromMovingCameraExample.m