Alpha Matting Evaluation Website
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Image matting evaluation results      Competition:   Low resolution  High resolution  
Error type:  SAD   MSE   Gradient   Connectivity  
Connectivity error overall
avg.
small
avg.
large
avg.
user
Troll
(Strongly Transparent)
Input  
Doll
(Strongly Transparent)
Input  
Donkey
(Medium Transparent)
Input  
Elephant
(Medium Transparent)
Input  
Plant
(Little Transparent)
Input  
Pineapple
(Little Transparent)
Input  
Plastic bag
(Highly Transparent)
Input  
Net
(Highly Transparent)
Input  
  rank rank rank rank small large user small large user small large user small large user small large user small large user small large user small large user
TransMatting6.27.356.40.7 4 0.6 1 0.7 2 0.1 4 0.1 3 0.1 3 0.2 5 0.2 5 0.1 1 0000.1 8 0.1 5 0.1 10 0 2 0 3 0 7 0.9 7 0.9 6 1.1 15 1.8 21 1.6 12 1.5 7
Random Walk Matting8.76.912.66.50.8 8 0.8 11 0.8 10 0 1 0 1 0 1 0.2 31 0.2 29 0.2 34 0 1 0 1 0 1 0.1 5 0.4 51 0.1 1 0 7 0 6 0 3 0.2 1 0.2 1 0.6 1 1.2 1 1.2 1 1.2 1
TIMI-Net8.811.77.47.30.7 3 0.7 4 0.7 3 0.1 12 0.2 12 0.1 6 0.2 19 0.1 2 0.2 4 0000.1 25 0.1 6 0.1 4 0 5 0 5 0 1 0.9 6 0.8 5 1.1 14 1.6 12 1.8 18 1.8 19
SIM9.69.88.610.60.7 2 0.7 3 0.7 4 0.1 16 0.1 9 0.1 12 0.1 2 0.2 3 0.1 2 0 5 0 4 00.1 11 0.1 9 0.2 14 0 10 0 9 0 9 0.9 5 0.8 4 0.9 8 2.1 27 2 28 2.1 25
LFPNet11.213.610.69.80.6 1 0.6 2 0.6 1 0.1 9 0.1 7 0.1 8 0.2 4 0.2 6 0.2 10 000 8 0.1 32 0.1 15 0.2 17 0 6 0 4 0 2 0.8 4 0.7 3 0.8 6 2.7 39 2.6 37 2.1 26
IamAlpha12.812.713.112.40.8 7 0.7 9 0.7 6 0.1 6 0.1 5 0.1 4 0.2 23 0.2 25 0.2 30 0000.1 4 0.1 7 0.1 5 0 12 0 10 0 6 1.1 12 1.1 10 1.1 13 2 25 2 26 2 23
Transfusive Weights12.87.810.920.60.8 9 0.8 12 0.8 11 0 2 0 2 0.1 2 0.2 32 0.2 30 0.2 35 0 4 000.1 3 0.1 21 0.7 42 0 8 0 7 0 4 0.2 2 0.2 2 0.7 2 1.2 2 1.2 2 3.4 48
TMFNet1515.114.715.30.7 5 0.7 5 0.7 5 0.2 21 0.3 24 0.2 16 0.2 6 0.2 7 0.2 8 0000.1 17 0.1 16 0.2 22 0 1 0 1 0 5 1 9 1 9 1.1 12 3.2 47 3.2 41 2.9 39
PIIAMatting17.715.116.321.90.9 24 0.8 23 0.9 31 0.1 8 0.2 14 0.2 17 0.2 18 0.2 21 0.2 27 00 24 00.1 12 0.1 23 0.2 20 0 4 0 8 0.1 13 12.1 29 1.3 11 1.1 16 1.6 11 1.3 6 2.4 29
CCM18.719.419.617.10.7 6 0.8 10 0.7 9 0.4 45 0.6 41 0.6 49 0.2 9 0.2 11 0.2 7 0 13 0 8 0 15 0.1 18 0.1 14 0.4 27 0.1 23 0.3 26 0.1 22 15.4 36 12 36 0.7 3 1.4 5 1.5 11 1.4 5
Closed-Form Matting19.217.519.620.40.8 11 0.8 16 0.7 8 0.2 18 0.3 22 0.3 25 0.2 17 0.2 10 0.2 22 0 20 0 18 0 24 0.1 19 0.2 29 0.4 29 0.2 39 0.4 34 0.2 35 0.5 3 1.7 15 1 11 1.6 13 1.6 13 1.5 9
LNSP Matting19.422.519.116.50.8 12 0.7 6 0.8 14 0.2 19 0.3 21 0.2 19 0.2 11 0.2 9 0.2 6 0 17 0 19 0 23 0.1 13 0.1 8 0.1 7 0.2 29 0.5 35 0.1 24 25.9 50 12.3 38 1.1 19 2.1 29 1.8 17 1.9 20
Deep Matting20201920.91.1 47 1.1 41 1 44 0.1 14 0.1 11 0.1 9 0.1 1 0.1 1 0.1 3 0000.1 23 0.1 18 0.1 11 0 13 0 14 0.1 18 1 10 2.3 16 1.1 17 2.2 32 2.2 32 3.3 44
GCA Matting21.725.119.320.61.1 44 1.1 42 1 39 0.2 27 0.2 17 0.2 21 0.2 13 0.2 19 0.2 25 0000.1 41 0.1 17 0.1 12 0 16 0.1 18 0.1 11 1.1 13 1.3 12 1.3 25 1.9 22 1.5 10 1.6 11
AdaMatting22.320.124.622.31.1 48 1.1 43 1.1 47 0.1 5 0.2 19 0.2 20 0.2 39 0.2 38 0.2 45 000 7 0.1 24 0.1 24 0.1 9 0 3 0 2 0.1 19 6.8 18 13.3 41 1.4 28 1.3 4 1.3 5 1.3 3
VDRN Matting22.423.525.318.40.9 35 0.9 31 0.9 30 0.1 15 0.2 16 0.2 15 0.2 22 0.2 28 0.2 26 0 2 0 2 0 3 0.1 47 0.2 35 0.2 19 0 9 0 12 0 8 18.3 40 18.3 51 1.5 29 1.7 18 2 27 1.7 17
IndexNet Matting24.723.325.625.11.3 52 1.3 50 1.3 53 0.1 13 0.1 10 0.1 13 0.2 8 0.2 24 0.2 11 00 26 00.1 45 0.1 25 0.3 25 0 14 0.1 20 0.2 27 10 22 10.7 34 1.8 35 1.6 9 1.7 16 1.6 12
ATNet Matting24.92426.424.40.9 26 1.2 44 0.9 32 0.1 3 0.1 4 0.1 5 0.2 34 0.2 43 0.2 40 000 2 0.3 53 0.3 43 0.6 33 0 11 0 11 0.1 12 11.9 27 9.6 33 3.5 50 1.6 14 1.4 7 1.9 21
Context-aware Matting25.227.42424.31.2 51 1.2 45 1.2 50 0.1 11 0.1 6 0.1 10 0.3 53 0.3 47 0.3 50 0 3 0 7 0 5 0.1 33 0.1 13 0.1 3 0 18 0.2 23 0.1 17 14.9 33 14.3 43 2.4 43 1.7 17 1.5 8 1.7 16
SampleNet Matting25.427.322.626.60.9 23 0.9 30 0.8 23 0.1 7 0.1 8 0.1 7 0.2 33 0.2 37 0.2 37 00 3 0 9 0.1 43 0.1 22 0.2 23 0 17 0.1 16 0.2 28 1.5 14 1.5 13 1.8 34 3.8 54 3.9 52 3.8 52
Large Kernel Matting25.627.124.525.31 42 0.9 27 0.9 36 0.2 26 0.4 32 0.3 24 0.2 21 0.2 26 0.2 32 0 24 0 16 0 18 0.1 27 0.2 30 0.5 31 0.2 41 0.4 32 0.2 32 3.3 16 1.6 14 0.8 5 1.8 20 1.8 19 2 24
Three Stages Matting25.925.429.622.60.8 10 0.7 8 0.7 7 0.2 22 0.3 23 0.3 26 0.2 16 0.2 16 0.2 19 0 27 0 12 0 33 0.1 37 0.2 40 0.6 37 0.1 21 1.4 56 0.1 14 26.4 51 28.1 60 1.5 30 1.8 19 1.9 22 1.6 15
Three-layer graph matting26.324.427.626.80.9 25 0.8 15 0.8 12 0.3 34 0.3 28 0.4 36 0.2 35 0.2 35 0.2 31 0 9 0 27 0 12 0.1 1 0.1 1 0.7 45 0.1 25 0.4 33 0.1 26 34.7 59 35.5 62 2.3 42 1.5 7 1.9 20 1.6 10
A2U Matting26.329.12723.30.8 17 0.8 21 0.8 15 0.2 17 0.2 13 0.1 11 0.2 41 0.2 36 0.2 38 000 6 0.1 40 0.2 38 0.3 26 0.1 19 0.1 17 0.1 15 1 11 0.9 7 1.1 18 4.8 59 4.6 57 4.5 57
SVR Matting26.528.525.125.81.2 49 1 33 1.1 48 0.3 33 0.5 35 0.4 33 0.3 49 0.2 44 0.2 46 0 11 0 15 0 29 0.1 15 0.2 31 0.2 18 0.1 24 0.1 19 0.1 16 20.3 41 4.8 20 1 10 1.5 6 1.3 4 1.4 6
DCNN Matting26.726.82528.31 41 1 37 1 46 0.2 29 0.3 27 0.3 30 0.2 36 0.2 31 0.2 33 0 14 0 14 0 11 0.1 2 0.1 2 0.1 2 0.1 20 0.1 15 0.1 21 20.4 42 12.4 39 3.1 48 2.1 30 2.4 35 2.6 35
Improved color matting27.629.62528.10.8 14 0.8 17 0.8 22 0.3 37 0.6 37 0.5 39 0.2 27 0.2 18 0.2 18 0 21 0 11 0 20 0.1 29 0.2 28 0.6 40 0.1 22 0.1 21 0.1 20 29.5 54 15.6 47 1.8 33 2.3 33 1.9 21 2.4 33
LocalSamplingAndKnnClassification27.829.827.526.10.8 16 0.8 14 0.8 19 0.2 20 0.3 25 0.3 23 0.2 26 0.2 20 0.2 21 0 32 0 22 0 17 0.1 36 0.2 37 0.7 43 0.2 40 0.4 31 0.3 38 32.9 58 22 57 2 40 1.6 10 1.7 14 1.5 8
Local Spline Regression (LSR)28.933.929.123.80.9 29 0.7 7 0.8 13 0.2 23 0.3 29 0.3 31 0.2 42 0.2 32 0.2 24 0 26 0 25 0 26 0.1 30 0.2 36 0.4 28 0.2 42 0.3 28 0.2 34 39.2 63 32.8 61 1.2 20 1.6 16 1.7 15 1.6 14
Cell-based matting Laplacian2930.626.430.10.9 28 0.8 18 0.8 25 0.4 40 1.3 52 0.5 42 0.2 28 0.2 22 0.2 23 0 41 0.1 33 0.1 47 0.1 26 0.1 26 0.6 36 0.4 53 0.3 27 0.3 42 11.5 26 8.5 30 1.3 24 1.2 3 1.3 3 1.2 2
HDMatt29.934.726.128.91.5 57 1.3 49 1.3 54 0.3 35 0.3 20 0.3 28 0.3 52 0.3 49 0.3 54 0000.1 42 0.1 11 0.1 6 0 15 0 13 0 10 0.9 8 0.9 8 1.2 23 2.4 34 2.2 33 2.3 27
Information-flow matting30.229.429.531.81 37 1 34 1 41 0.4 43 0.5 34 0.5 45 0.2 40 0.2 40 0.2 42 0 7 0 23 0 32 0.1 10 0.1 4 0.1 8 0.1 27 0.3 24 0.1 25 25 48 15.8 48 1.9 39 1.9 23 2.1 29 1.9 22
Learning Based Matting30.831.130.830.50.8 18 0.8 19 0.8 16 0.1 10 0.2 15 0.2 14 0.2 14 0.2 8 0.2 16 0 23 0 20 0 22 0.6 57 1.1 58 2.1 59 0.2 28 0.3 25 0.2 29 22.5 44 13.3 42 1.3 26 4.3 55 5.9 59 8.5 62
TSPS-RV Matting31.532.530.931.30.9 27 0.8 20 0.9 29 0.2 24 0.4 30 0.3 22 0.2 44 0.2 41 0.2 36 0 6 0 9 0 14 0.1 22 0.2 33 0.6 35 0.2 37 0.6 37 0.1 23 25.3 49 9.1 31 2.1 41 3.5 51 3.4 46 3.7 50
Patch-based Matting33.231.83631.90.9 31 0.8 22 0.9 28 0.3 36 0.5 36 0.4 35 0.2 15 0.2 15 0.2 20 0 12 0 13 0 19 0.1 48 0.3 48 0.6 34 0.2 31 0.9 46 0.2 37 10.2 23 22.5 58 1.4 27 4.8 58 3.6 50 4.1 55
KNN Matting33.937.531.632.53.4 59 2.8 59 3.1 61 0.3 39 0.5 33 0.4 37 0.2 30 0.2 34 0.2 44 0 29 0 6 0.1 43 0.1 20 0.2 27 0.2 16 0.3 47 0.7 41 0.4 51 17.8 39 8 28 0.8 4 2.6 37 2 25 1.3 4
ATPM Matting3437.332.931.90.9 32 0.9 26 0.8 26 0.2 28 0.3 26 0.3 29 0.2 48 0.3 50 0.2 41 0 36 0.1 30 0 39 0.1 38 0.1 20 0.2 13 0.3 44 0.7 42 0.3 40 12.1 28 5 21 1.2 21 3.1 44 3.5 48 3.3 46
Improving Sampling Criterion34.231.935.435.40.8 13 0.9 28 0.9 33 0.3 38 0.8 45 0.3 27 0.2 12 0.2 17 0.2 13 0 40 1.1 48 0 35 0.3 54 0.6 54 1.2 55 0.3 46 0.7 43 0.2 36 5.3 17 4.2 18 4.1 52 2.4 35 2.1 30 2.4 32
Segmentation-based matting34.334.135.533.30.8 21 1.7 55 0.8 17 0.3 31 0.4 31 0.4 34 0.2 24 0.2 13 0.2 17 0 25 0 10 0 21 0.1 35 0.3 44 1.1 52 0.2 36 0.3 29 0.3 46 29.5 55 38.5 63 1.8 38 3.1 46 2.8 39 3 41
Global Sampling Matting34.531.836.834.90.8 20 0.8 13 0.8 21 0.2 30 0.6 42 0.4 38 0.2 20 0.2 14 0.2 12 0 28 0.4 37 0 25 0.1 21 0.3 45 0.6 39 0.2 35 1.1 54 0.3 41 32.7 57 14.5 44 5 54 3 43 3.4 45 3.4 49
High-res matting35.334.340.930.80.8 22 2.5 57 0.8 20 0.5 50 1.1 49 0.7 52 0.2 3 0.2 4 0.2 5 0 22 0.7 43 0 13 0.2 49 0.4 52 2.8 61 0.4 56 1.1 53 0.3 48 8.4 20 5.2 22 1 9 3.6 52 3.5 47 2.9 38
AlphaGAN35.840.734.632.61.2 50 1.3 47 1.2 51 0.2 25 0.2 18 0.2 18 0.4 60 0.4 57 0.3 60 00 5 0 4 0.1 34 0.2 32 0.2 15 0.2 34 0.2 22 0.3 39 15.2 34 12.8 40 1.5 31 3.3 48 4.2 56 3.1 43
CSC Matting37.136.532.642.31.5 55 1.5 53 1.8 57 0.3 32 0.6 40 0.4 32 0.3 54 0.2 27 0.2 47 0 34 0.1 28 0.1 48 0.1 7 0.1 3 0.2 21 0.3 43 0.7 40 0.3 44 13.2 31 14.9 46 4.5 53 2.6 36 2 24 2.8 36
LNCLM matting37.436.837.338.31 39 1 35 0.8 27 0.5 49 0.6 38 0.5 44 0.3 55 0.3 54 0.3 56 0 38 0.1 31 0.1 41 0.1 6 0.1 19 0.5 30 0.2 30 0.4 30 0.2 31 16.1 37 19.7 53 1.8 37 2.8 40 2.8 38 2.9 40
Shared Matting37.735.942.1350.9 30 1.4 52 0.9 35 0.6 53 1.4 55 0.8 53 0.2 10 0.2 23 0.2 14 0 37 0.7 44 0.1 42 0.1 28 0.2 34 0.8 47 0.3 45 1 52 0.4 52 28.2 53 19.8 54 0.9 7 2.1 31 1.9 23 2.4 30
Comprehensive Weighted Color and Texture37.830.643.439.51 43 1.2 46 1 45 0.5 48 0.8 46 0.6 50 0.3 50 0.3 53 0.3 55 0 8 0.3 35 0 28 0.1 9 0.2 41 0.7 41 0.2 32 0.6 38 0.2 33 24.4 47 19 52 2.6 46 1.5 8 2.5 36 1.8 18
Weighted Color and Texture Matting38.434.942.138.11 40 1 40 1 43 0.4 41 1 48 0.5 48 0.2 45 0.3 45 0.2 48 0 33 1 47 0 10 0.1 46 0.3 47 0.8 48 0.1 26 0.6 39 0.3 45 11 24 8.4 29 1.7 32 2 24 3.2 42 2.4 31
Sparse coded matting38.537.636.341.51.4 54 1 39 1.3 52 0.6 51 0.9 47 0.5 47 0.3 58 0.4 58 0.3 59 0 31 0.1 29 0 40 0.1 14 0.1 12 0.5 32 0.2 33 1 51 0.2 30 14.3 32 5.5 23 2.4 44 2.1 28 2.2 31 2.3 28
Graph-based sparse matting4038.540.940.61.1 45 0.9 32 1 40 0.4 42 0.6 39 0.5 43 0.3 56 0.3 51 0.3 52 0 18 0.2 34 0 38 0.1 16 0.1 10 0.2 24 0.2 38 0.9 50 0.3 43 27.6 52 22 56 3.6 51 2.9 41 4.1 55 2.5 34
KL-Divergence Based Sparse Sampling4041.638.5401 36 0.9 29 0.9 37 0.4 44 0.7 43 0.5 40 0.2 47 0.2 42 0.2 15 0 15 0 17 0 30 0.1 44 0.2 39 0.7 46 0.4 54 0.8 44 0.4 49 21.4 43 18.1 50 3 47 3.4 50 3.3 44 4.5 56
SPS matting42.137.946.941.50.8 15 1.3 48 0.8 24 0.6 52 1.1 50 0.5 41 0.2 29 0.3 52 0.2 28 0 39 1.5 50 0 34 0.2 52 0.4 50 1 51 0.3 48 1.2 55 0.4 50 7.4 19 3.7 17 5.8 57 3.3 49 3.9 53 3.4 47
Comprehensive sampling42.841.443.343.81 38 1 36 1 38 0.5 46 0.8 44 0.5 46 0.2 38 0.3 46 0.2 43 0 19 0 21 0 31 0.1 39 0.3 46 0.9 49 0.3 49 0.9 47 0.3 47 23.2 45 20.1 55 1.8 36 4.6 57 3.8 51 5 60
LMSPIR43.241.446.3420.8 19 0.9 25 0.8 18 0.6 54 1.3 53 0.9 54 0.2 25 0.2 33 0.2 39 0 16 0.3 36 0 16 0.6 59 1.3 60 1.9 56 0.6 58 1.6 58 0.4 53 38.8 62 14.6 45 3.4 49 2.7 38 6 60 3.7 51
Robust Matting454443.447.51.1 46 2.6 58 1.1 49 0.9 57 2 57 1.1 56 0.2 7 0.2 12 0.2 9 0 35 0.1 32 0 36 0.6 58 1.1 59 2 58 0.4 50 0.5 36 0.4 56 17.3 38 9.5 32 7.2 58 5.2 61 6.3 61 4.7 58
Shared Matting (Real Time)45.54446.845.81.3 53 2.4 56 1.4 56 1.4 58 2.5 58 1.5 58 0.2 46 0.3 56 0.2 49 0.1 43 1.3 49 0.1 46 0.2 50 0.3 49 0.7 44 0.4 51 0.9 48 0.4 54 11.2 25 6 24 1.2 22 2 26 2.3 34 2.8 37
SRLO Matting46.344.350.344.30.9 34 1 38 0.9 34 0.8 56 1.7 56 1.1 57 0.2 43 0.2 39 0.3 53 0 30 0.5 39 0 27 0.4 55 0.5 53 1.9 57 0.8 60 2 60 0.6 57 35.2 61 25.6 59 5.6 56 1.6 15 4.9 58 1.6 13
Global Sampling Matting (filter version)46.84744.948.60.9 33 0.8 24 1 42 0.5 47 1.2 51 0.7 51 0.2 37 0.3 48 0.2 29 0.1 44 0.7 42 0.1 44 0.2 51 0.6 55 1.1 53 0.4 55 1.7 59 0.4 55 32.3 56 7.3 26 16.6 61 3.6 53 4 54 4 54
Iterative Transductive Matting5050.345.554.11.7 58 1.6 54 1.4 55 0.7 55 1.4 54 1 55 0.3 57 0.3 55 0.3 58 0.1 42 0.6 40 0.1 45 0.1 31 0.2 42 0.9 50 0.5 57 0.9 49 0.6 58 35.2 60 7.9 27 7.6 59 2.9 42 3.2 43 3.9 53
Geodesic Matting52.252.651.352.63.6 60 3 60 3.4 62 3 61 3.4 60 3.4 62 1.8 63 1.5 63 1.6 63 0.9 49 1.7 51 0.1 49 0.7 61 0.8 57 0.6 38 0.4 52 2 61 0.9 60 12.6 30 16 49 2.4 45 3.1 45 1.5 9 3.1 42
Iterative BP Matting52.551.15056.51.5 56 1.4 51 1.9 58 1.8 59 3.2 59 2.6 60 0.4 59