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Using particle filter for face tracking
1.
Particle filters Maria Mikhisor
2.
3D without glasses
3.
Autosterescopic display Eye tracking 3D without glasses
4.
Eye tracking To simplify
my task, I started from head tracking
5.
My task is
to track faces on different distances
6.
There are many
different algorithms for tracking… For various reasons I chose Particle Filters
7.
8.
Not this kind
of particles…
9.
A particle is
a hypothesis, one possible state of a system
10.
11.
Prior distribution Frame 1
12.
Prior distribution Frame 2
13.
Prior distribution Frame 2
14.
Observation Frame 2
15.
Averaging posterior Frame 2
16.
Resampling Frame 2
17.
Prior distribution Frame 3
18.
Move Frame 3
19.
Resample Frame 3
20.
5 distances 1m –
3m 3 videos for each distance 3 experiments for each video My experiments
21.
Getting ground truth
data: 1 video 1 min long labeling manually 1800 frames
22.
Motion model position 1st
order velocity acceleration 2nd order 3d order
23.
Motion model
24.
25.
Observation models
26.
Color histogram
27.
Active shape model
28.
Histogram of oriented
edges
29.
Haar wavelets
30.
Combining feature detectors Cascades Linear combinations
31.
Color histogram +
Haar wavelets
32.
Color histogram +
Active contour
33.
Simple histogram VS
compound histogram
34.
Ellipse parameterization
35.
Number of particles
36.
Plans for near
future…
37.
Cylindrical projection
38.
Multi-cameras tracking One 3D
Particle Filter Two 2D Particle Filters that communicate or
39.
Use Kinect for
collecting ground truth data
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