Combining 3D Shape, Color, and Motion for Robust Anytime Tracking David Held, Jesse Levinson, Sebas5an Thrun, and Silvio Savarese
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1 Goal: Fast and Robust Velocity Es5ma5on Combining 3D Shape, Color, and Motion for Robust Anytime Tracking David Held, Jesse Levinson, Sebas5an Thrun, and Silvio Savarese Our Approach: Alignment Probability P 1 P 2 p(x t z 1...z t )=ηp(z t x t,z t 1 )p(x t z 1...z t 1 ) Annealed Dynamic Histograms P 3 P 4 Spatial Distance Color Distance (if available) Probability of Occlusion
2 Goal: Fast and Robust Velocity Es5ma5on Combining 3D Shape, Color, and Motion for Robust Anytime Tracking David Held, Jesse Levinson, Sebas5an Thrun, and Silvio Savarese Baseline: Centroid Kalman Filter t+1 t p(x t z 1...z t )=ηp(z t x t,z t 1 )p(x t z 1...z t 1 ) Annealed Dynamic Histograms Baseline: ICP Local Search Poor Local Optimum!
3 Goal: Fast and Robust Velocity Es5ma5on Combining 3D Shape, Color, and Motion for Robust Anytime Tracking David Held, Jesse Levinson, Sebas5an Thrun, and Silvio Savarese Our Approach: Alignment Probability P 1 P 2 p(x t z 1...z t )=ηp(z t x t,z t 1 )p(x t z 1...z t 1 ) Annealed Dynamic Histograms P 3 P 4 Spatial Distance Color Distance (if available) Probability of Occlusion
4 Mo#va#on Quickly and robustly estimate the speed of nearby objects
5 Camera Images System Laser Data
6 Camera Images System Laser Data Previous Work (Teichman, et al)
7 Camera Images System Velocity Estimation Laser Data This Work Previous Work (Teichman, et al)
8 Velocity Es#ma#on t
9 Velocity Es#ma#on t+1 t
10 Velocity Es#ma#on t+1 t
11 Velocity Es#ma#on t+1 t
12 Velocity Es#ma#on t+1 t
13 ICP Baseline
14 ICP Baseline
15 ICP Baseline
16 ICP Baseline
17 ICP Baseline Local Search Poor Local Optimum!
18 Tracking Probability
19 Velocity Es#ma#on t
20 Velocity Es#ma#on t+1 t
21 Velocity Es#ma#on t+1 t
22 Velocity Es#ma#on t+1 t
23 Velocity Es#ma#on t+1 t
24 Velocity Es#ma#on t+1 t
25 Velocity Es#ma#on t+1 t X t
26 Velocity Es#ma#on t+1 t X t
27 Tracking Probability Measurement Model Motion Model
28 Tracking Probability Measurement Model Motion Model Constant velocity Kalman filter
29 Tracking Probability Measurement Model Motion Model
30 Tracking Probability Measurement Model Motion Model
31 Tracking Probability Measurement Model Motion Model
32 Tracking Probability Measurement Model Motion Model
33 Tracking Probability Measurement Model Motion Model
34 Tracking Probability Measurement Model Motion Model
35 Tracking Probability Measurement Model Motion Model
36 Tracking Probability Measurement Model Motion Model
37 Tracking Probability Measurement Model Motion Model
38 Tracking Probability Measurement Model Motion Model
39 Tracking Probability Measurement Model Motion Model
40 Tracking Probability Measurement Model Motion Model k
41 Tracking Probability Measurement Model Motion Model k Sensor noise Sensor resolution
42
43 Color Probability Probability Delta Color Value
44 Including Color
45 Including Color ( ) η z i z exp( 1 t 2 (z i z j ) T Σ 1 (z i z j )) + k
46 Including Color ( ) η z i z exp( 1 t 2 (z i z j ) T Σ 1 (z i z j )) + k
47 Including Color
48 Including Color
49 Including Color Probability Delta Color Value
50 Including Color Probability Delta Color Value
51 Including Color Probability Delta Color Value
52 Probabilis#c Framework 3D Shape Color Motion History Tracking
53 Tracking Probability P 1 P 2 P 3 P 4
54 Tracking Probability v y????? v x
55 Tracking Probability v y v x
56 Dynamic Decomposi#on v y v x
57 Dynamic Decomposi#on v y v x
58 Dynamic Decomposi#on v y v x
59 Dynamic Decomposi#on v y Derived from minimizing KL-divergence between approximate distribution and true posterior v x
60 Inflate the measurement model Annealing
61 Inflate the measurement model Annealing
62 Inflate the measurement model Annealing
63 Algorithm 1. For each hypothesis A. Compute the probability of the alignment Measurement Model Motion Model
64 Algorithm 1. For each hypothesis A. Compute the probability of the alignment Measurement Model B. Finely sample high probability regions Motion Model
65 Algorithm 1. For each hypothesis A. Compute the probability of the alignment Measurement Model B. Finely sample high probability regions Motion Model C. Go to step 1 to compute the probability of new hypotheses
66 Annealing More time More accurate
67 Any#me Tracker RMS error (m/s) Mean runtime (ms)
68 Any#me Tracker 0.6 RMS error (m/s) Choose runtime based on: Total runtime requirements Importance of tracked object Mean runtime (ms)
69 Comparisons 1.2 RMS error (m/s) Kalman Filter Mean runtime (ms) Mean
70 Comparisons 1.2 RMS error (m/s) Kalman Filter ICP Kalman ICP with Centroid Init Kalman ICP with Kalman Init Mean runtime (ms) Mean
71 Comparisons 1.2 RMS error (m/s) Kalman Filter ICP Kalman ICP with Centroid Init Kalman ICP with Kalman Init Annealed Dynamic Histograms Mean runtime (ms)
72 Kalman Filter
73 Kalman Filter ADH Tracker (Ours)
74 Models
75 Quan#ta#ve Evalua#on Crispness Kalman Filter Kalman ICP ADH Tracker (Ours) 0 People Bikes Cars
76 Sampling Strategies RMS error (m/s) ADH Tracker (Ours) Dense sampling Dense sampling with motion prediction Top cell sampling Mean runtime (ms)
77 Advantages over Radar
78 Conclusions 3D Shape Color Motion History Tracking Robust to Occlusions, Viewpoint Changes
79 Conclusions 3D Shape Color Motion History Tracking Robust to Occlusions, Viewpoint Changes Runs in Real-time Robust to Initialization Errors
80
81 Color Probability Probability Delta Color Value
82 Error vs Number of Points 1.5 Kalman Filter ADH Tracker (Ours) RMS error (m/s) Number of points
83 RMS error (m/s) Error vs Distance Kalman Filter ADH Tracker (Ours) Distance to tracked vehicle (m)
84 Error vs Number of Frames 2 RMS error (m/s) Number of frames tracked
85 Error vs Number of Frames 2 ADH Tracker ADH Tracker without motion model RMS error (m/s) Number of frames tracked
86 RMS error (m/s) No color No motion model No 3D shape
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