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
Random Walk Matting8.56.612.46.50.8 6 0.8 9 0.8 8 0 1 0 1 0 1 0.2 32 0.2 29 0.2 35 0 1 0 1 0 1 0.1 5 0.4 52 0.1 1 0 6 0 5 0 4 0.2 1 0.2 1 0.6 1 1.2 1 1.2 1 1.2 1
TIMI-Net8.811.67.47.40.7 3 0.7 4 0.7 3 0.1 13 0.2 13 0.1 6 0.2 18 0.1 2 0.2 3 0000.1 23 0.1 6 0.1 5 0 4 0 4 0 2 0.9 7 0.8 5 1.1 13 1.6 13 1.8 18 1.8 20
SIM9.69.98.610.40.7 2 0.7 2 0.7 4 0.1 17 0.1 10 0.1 13 0.1 2 0.2 3 0.1 1 0 5 0 5 00.1 10 0.1 9 0.2 14 0 10 0 8 0 8 0.9 6 0.8 4 0.9 8 2.1 27 2 28 2.1 25
LFPNet11.213.410.49.90.6 1 0.6 1 0.6 1 0.1 9 0.1 8 0.1 8 0.2 4 0.2 5 0.2 8 000 10 0.1 31 0.1 15 0.2 17 0 5 0 3 0 3 0.8 4 0.7 3 0.8 6 2.7 40 2.6 38 2.1 26
Transfusive Weights12.77.510.420.90.8 7 0.8 10 0.8 9 0 2 0 2 0.1 2 0.2 33 0.2 30 0.2 36 0 4 000.1 3 0.1 21 0.7 43 0 7 0 6 0 5 0.2 2 0.2 2 0.7 2 1.2 2 1.2 2 3.4 49
S²Matt12.715.312110.7 4 0.7 3 0.6 2 0.1 10 0.1 6 0.1 11 0.2 6 0.2 9 0.2 9 000 8 0.1 36 0.1 16 0.2 19 0 3 0 1 0 1 0.8 5 1.1 8 0.9 9 2.9 43 3 41 2.4 29
IamAlpha1414.713.313.90.9 25 0.9 27 0.8 27 0.1 5 0.1 4 0.1 3 0.2 23 0.2 19 0.2 22 0000.1 4 0.1 5 0.1 4 0 12 0 10 0 6 1.2 12 1.2 9 1.1 16 1.8 22 1.8 19 1.8 19
Background Matting14.115.612.414.40.9 26 0.8 21 0.8 23 0.1 4 0.1 3 0.1 4 0.2 27 0.2 31 0.2 33 0000.1 26 0.1 7 0.1 11 0 8 0 11 0.1 12 1.4 13 1.3 10 1.1 14 1.3 5 1.3 4 1.3 4
PIIAMatting17.714.616.522.30.9 22 0.8 22 0.9 31 0.1 8 0.2 15 0.2 17 0.2 17 0.2 22 0.2 28 00 25 00.1 11 0.1 23 0.2 21 0 2 0 7 0.1 13 12.1 30 1.3 11 1.1 15 1.6 12 1.3 7 2.4 31
CCM18.919.419.917.40.7 5 0.8 8 0.7 7 0.4 46 0.6 42 0.6 50 0.2 8 0.2 10 0.2 6 0 13 0 9 0 17 0.1 16 0.1 14 0.4 27 0.1 24 0.3 27 0.1 23 15.4 37 12 37 0.7 3 1.4 6 1.5 12 1.4 6
Closed-Form Matting19.217.419.620.60.8 9 0.8 14 0.7 6 0.2 20 0.3 24 0.3 26 0.2 16 0.2 8 0.2 21 0 20 0 19 0 26 0.1 17 0.2 29 0.4 29 0.2 40 0.4 35 0.2 36 0.5 3 1.7 15 1 12 1.6 14 1.6 13 1.5 9
LNSP Matting19.522.519.416.80.8 10 0.7 5 0.8 12 0.2 21 0.3 23 0.2 20 0.2 10 0.2 7 0.2 5 0 17 0 20 0 25 0.1 12 0.1 8 0.1 7 0.2 30 0.5 36 0.1 25 25.9 51 12.3 39 1.1 19 2.1 29 1.8 17 1.9 21
Deep Matting2019.919.3211.1 48 1.1 42 1 45 0.1 15 0.1 12 0.1 9 0.1 1 0.1 1 0.1 2 0000.1 21 0.1 18 0.1 10 0 13 0 14 0.1 19 1 9 2.3 16 1.1 17 2.2 32 2.2 32 3.3 45
GCA Matting21.925.119.620.91.1 45 1.1 43 1 40 0.2 28 0.2 18 0.2 22 0.2 12 0.2 18 0.2 26 0000.1 41 0.1 17 0.1 12 0 16 0.1 18 0.1 10 1.1 11 1.3 12 1.3 25 1.9 23 1.5 11 1.6 11
VDRN Matting22.72425.518.60.9 36 0.9 31 0.9 30 0.1 16 0.2 17 0.2 16 0.2 22 0.2 28 0.2 27 0 2 0 2 0 3 0.1 47 0.2 35 0.2 20 0 9 0 12 0 7 18.3 41 18.3 52 1.5 29 1.7 19 2 27 1.7 17
AdaMatting22.820.125.3231.1 49 1.1 44 1.1 48 0.1 6 0.2 20 0.2 21 0.2 40 0.2 39 0.2 46 000 9 0.1 22 0.1 24 0.1 9 0 1 0 2 0.1 20 6.8 19 13.3 42 1.4 28 1.3 4 1.3 6 1.3 3
IndexNet Matting25.223.726.325.41.3 53 1.3 51 1.3 54 0.1 14 0.1 11 0.1 14 0.2 7 0.2 25 0.2 10 00 27 00.1 45 0.1 25 0.3 25 0 14 0.1 21 0.2 28 10 23 10.7 34 1.8 35 1.6 10 1.7 16 1.6 12
ATNet Matting25.324.326.924.80.9 24 1.2 45 0.9 32 0.1 3 0.1 5 0.1 5 0.2 35 0.2 44 0.2 41 000 2 0.3 54 0.3 44 0.6 34 0 11 0 9 0.1 11 11.9 28 9.6 33 3.5 51 1.6 15 1.4 8 1.9 22
SampleNet Matting25.727.323270.9 21 0.9 30 0.8 21 0.1 7 0.1 9 0.1 7 0.2 34 0.2 38 0.2 38 00 3 0 11 0.1 43 0.1 22 0.2 23 0 17 0.1 16 0.2 29 1.5 14 1.5 13 1.8 34 3.8 55 3.9 53 3.8 53
Context-aware Matting25.827.924.924.81.2 52 1.2 46 1.2 51 0.1 12 0.1 7 0.1 10 0.3 54 0.3 48 0.3 51 0 3 0 8 0 5 0.1 32 0.1 13 0.1 3 0 18 0.2 24 0.1 18 14.9 34 14.3 44 2.4 44 1.7 18 1.5 9 1.7 16
Large Kernel Matting2627.424.925.91 43 0.9 26 0.9 37 0.2 27 0.4 33 0.3 25 0.2 21 0.2 26 0.2 32 0 24 0 17 0 20 0.1 25 0.2 30 0.5 31 0.2 42 0.4 33 0.2 33 3.3 16 1.6 14 0.8 5 1.8 21 1.8 20 2 24
Three Stages Matting26.225.530.322.90.8 8 0.7 7 0.7 5 0.2 23 0.3 25 0.3 27 0.2 15 0.2 15 0.2 18 0 27 0 13 0 35 0.1 37 0.2 41 0.6 38 0.1 22 1.4 57 0.1 15 26.4 52 28.1 61 1.5 30 1.8 20 1.9 23 1.6 15
A2U Matting26.529.327.123.50.8 15 0.8 19 0.8 13 0.2 19 0.2 14 0.1 12 0.2 42 0.2 37 0.2 39 000 6 0.1 40 0.2 39 0.3 26 0.1 19 0.1 17 0.1 16 1 10 0.9 6 1.1 18 4.8 60 4.6 58 4.5 58
FE2E High-Quality Matting26.627.927.1250.9 35 1 41 0.9 33 0.1 18 0.2 21 0.2 18 0.2 20 0.2 21 0.2 23 00 4 0 7 0.2 50 0.2 38 0.6 33 0.1 20 0.1 20 0.1 14 5.3 18 10.7 35 2.2 42 2.3 34 2.6 37 2.4 30
Three-layer graph matting26.724.828.127.30.9 23 0.8 13 0.8 10 0.3 35 0.3 29 0.4 37 0.2 36 0.2 36 0.2 31 0 9 0 28 0 14 0.1 1 0.1 1 0.7 46 0.1 26 0.4 34 0.1 27 34.7 60 35.5 63 2.3 43 1.5 8 1.9 21 1.6 10
SVR Matting27.229.125.626.81.2 50 1 33 1.1 49 0.3 34 0.5 36 0.4 34 0.3 50 0.2 45 0.2 47 0 11 0 16 0 31 0.1 14 0.2 31 0.2 18 0.1 25 0.1 19 0.1 17 20.3 42 4.8 20 1 11 1.5 7 1.3 5 1.4 7
DCNN Matting27.427.425.529.41 42 1 37 1 47 0.2 30 0.3 28 0.3 31 0.2 37 0.2 32 0.2 34 0 14 0 15 0 13 0.1 2 0.1 2 0.1 2 0.1 21 0.1 15 0.1 22 20.4 43 12.4 40 3.1 49 2.1 30 2.4 35 2.6 37
Improved color matting27.929.825.328.60.8 12 0.8 15 0.8 20 0.3 38 0.6 38 0.5 40 0.2 28 0.2 17 0.2 17 0 21 0 12 0 22 0.1 28 0.2 28 0.6 41 0.1 23 0.1 22 0.1 21 29.5 55 15.6 48 1.8 33 2.3 33 1.9 22 2.4 35
LocalSamplingAndKnnClassification283027.826.40.8 14 0.8 12 0.8 17 0.2 22 0.3 26 0.3 24 0.2 26 0.2 20 0.2 20 0 32 0 23 0 19 0.1 35 0.2 37 0.7 44 0.2 41 0.4 32 0.3 39 32.9 59 22 58 2 40 1.6 11 1.7 14 1.5 8
Local Spline Regression (LSR)29.434.429.624.10.9 29 0.7 6 0.8 11 0.2 24 0.3 30 0.3 32 0.2 43 0.2 33 0.2 25 0 26 0 26 0 28 0.1 29 0.2 36 0.4 28 0.2 43 0.3 29 0.2 35 39.2 64 32.8 62 1.2 20 1.6 17 1.7 15 1.6 14
Cell-based matting Laplacian29.430.926.630.80.9 28 0.8 16 0.8 24 0.4 41 1.3 53 0.5 43 0.2 29 0.2 23 0.2 24 0 41 0.1 34 0.1 49 0.1 24 0.1 26 0.6 37 0.4 54 0.3 28 0.3 43 11.5 27 8.5 30 1.3 24 1.2 3 1.3 3 1.2 2
HDMatt30.335.326.629.11.5 58 1.3 50 1.3 55 0.3 36 0.3 22 0.3 29 0.3 53 0.3 50 0.3 55 0000.1 42 0.1 11 0.1 6 0 15 0 13 0 9 0.9 8 0.9 7 1.2 23 2.4 35 2.2 33 2.3 27
Information-flow matting30.93030.132.61 38 1 34 1 42 0.4 44 0.5 35 0.5 46 0.2 41 0.2 41 0.2 43 0 7 0 24 0 34 0.1 9 0.1 4 0.1 8 0.1 28 0.3 25 0.1 26 25 49 15.8 49 1.9 39 1.9 24 2.1 29 1.9 23
Learning Based Matting31.131.43130.90.8 16 0.8 17 0.8 14 0.1 11 0.2 16 0.2 15 0.2 13 0.2 6 0.2 15 0 23 0 21 0 24 0.6 58 1.1 59 2.1 60 0.2 29 0.3 26 0.2 30 22.5 45 13.3 43 1.3 26 4.3 56 5.9 60 8.5 63
TSPS-RV Matting32.132.931.332.10.9 27 0.8 18 0.9 29 0.2 25 0.4 31 0.3 23 0.2 45 0.2 42 0.2 37 0 6 0 10 0 16 0.1 20 0.2 33 0.6 36 0.2 38 0.6 38 0.1 24 25.3 50 9.1 31 2.1 41 3.5 52 3.4 47 3.7 51
Patch-based Matting33.732.136.432.50.9 31 0.8 20 0.9 28 0.3 37 0.5 37 0.4 36 0.2 14 0.2 14 0.2 19 0 12 0 14 0 21 0.1 48 0.3 49 0.6 35 0.2 32 0.9 47 0.2 38 10.2 24 22.5 59 1.4 27 4.8 59 3.6 51 4.1 56
KNN Matting34.63832.433.43.4 60 2.8 60 3.1 62 0.3 40 0.5 34 0.4 38 0.2 31 0.2 35 0.2 45 0 29 0 7 0.1 45 0.1 18 0.2 27 0.2 16 0.3 48 0.7 42 0.4 52 17.8 40 8 28 0.8 4 2.6 38 2 26 1.3 5
ATPM Matting34.63833.432.50.9 32 0.9 25 0.8 25 0.2 29 0.3 27 0.3 30 0.2 49 0.3 51 0.2 42 0 36 0.1 31 0 41 0.1 38 0.1 20 0.2 13 0.3 45 0.7 43 0.3 41 12.1 29 5 21 1.2 21 3.1 46 3.5 49 3.3 47
Improving Sampling Criterion34.73235.836.40.8 11 0.9 28 0.9 34 0.3 39 0.8 46 0.3 28 0.2 11 0.2 16 0.2 12 0 40 1.1 49 0 37 0.3 55 0.6 55 1.2 56 0.3 47 0.7 44 0.2 37 5.3 17 4.2 18 4.1 53 2.4 36 2.1 30 2.4 34
Segmentation-based matting34.834.436.333.60.8 19 1.7 56 0.8 15 0.3 32 0.4 32 0.4 35 0.2 24 0.2 12 0.2 16 0 25 0 11 0 23 0.1 34 0.3 45 1.1 53 0.2 37 0.3 30 0.3 47 29.5 56 38.5 64 1.8 38 3.1 48 2.8 40 3 42
Global Sampling Matting34.831.837.135.40.8 18 0.8 11 0.8 19 0.2 31 0.6 43 0.4 39 0.2 19 0.2 13 0.2 11 0 28 0.4 38 0 27 0.1 19 0.3 46 0.6 40 0.2 36 1.1 55 0.3 42 32.7 58 14.5 45 5 55 3 45 3.4 46 3.4 50
High-res matting35.834.541.631.40.8 20 2.5 58 0.8 18 0.5 51 1.1 50 0.7 53 0.2 3 0.2 4 0.2 4 0 22 0.7 44 0 15 0.2 49 0.4 53 2.8 62 0.4 57 1.1 54 0.3 49 8.4 21 5.2 22 1 10 3.6 53 3.5 48 2.9 40
AlphaGAN36.541.435.533.31.2 51 1.3 48 1.2 52 0.2 26 0.2 19 0.2 19 0.4 61 0.4 58 0.3 61 00 6 0 4 0.1 33 0.2 32 0.2 15 0.2 35 0.2 23 0.3 40 15.2 35 12.8 41 1.5 31 3.3 49 4.2 57 3.1 44
CSC Matting3837.333.443.51.5 56 1.5 54 1.8 58 0.3 33 0.6 41 0.4 33 0.3 55 0.2 27 0.2 48 0 34 0.1 29 0.1 50 0.1 7 0.1 3 0.2 22 0.3 44 0.7 41 0.3 45 13.2 32 14.9 47 4.5 54 2.6 37 2 25 2.8 38
LNCLM matting38.137.53838.91 40 1 35 0.8 26 0.5 50 0.6 39 0.5 45 0.3 56 0.3 55 0.3 57 0 38 0.1 32 0.1 43 0.1 6 0.1 19 0.5 30 0.2 31 0.4 31 0.2 32 16.1 38 19.7 54 1.8 37 2.8 41 2.8 39 2.9 41
Shared Matting38.3364335.90.9 30 1.4 53 0.9 36 0.6 54 1.4 56 0.8 54 0.2 9 0.2 24 0.2 13 0 37 0.7 45 0.1 44 0.1 27 0.2 34 0.8 48 0.3 46 1 53 0.4 53 28.2 54 19.8 55 0.9 7 2.1 31 1.9 24 2.4 32
Comprehensive Weighted Color and Texture38.731.344.340.51 44 1.2 47 1 46 0.5 49 0.8 47 0.6 51 0.3 51 0.3 54 0.3 56 0 8 0.3 36 0 30 0.1 8 0.2 42 0.7 42 0.2 33 0.6 39 0.2 34 24.4 48 19 53 2.6 47 1.5 9 2.5 36 1.8 18
Sparse coded matting39.138.136.842.41.4 55 1 39 1.3 53 0.6 52 0.9 48 0.5 48 0.3 59 0.4 59 0.3 60 0 31 0.1 30 0 42 0.1 13 0.1 12 0.5 32 0.2 34 1 52 0.2 31 14.3 33 5.5 23 2.4 45 2.1 28 2.2 31 2.3 28
Weighted Color and Texture Matting39.335.642.939.31 41 1 40 1 44 0.4 42 1 49 0.5 49 0.2 46 0.3 46 0.2 49 0 33 1 48 0 12 0.1 46 0.3 48 0.8 49 0.1 27 0.6 40 0.3 46 11 25 8.4 29 1.7 32 2 25 3.2 43 2.4 33
Graph-based sparse matting40.839.141.641.81.1 46 0.9 32 1 41 0.4 43 0.6 40 0.5 44 0.3 57 0.3 52 0.3 53 0 18 0.2 35 0 40 0.1 15 0.1 10 0.2 24 0.2 39 0.9 51 0.3 44 27.6 53 22 57 3.6 52 2.9 42 4.1 56 2.5 36
KL-Divergence Based Sparse Sampling40.942.439.440.91 37 0.9 29 0.9 38 0.4 45 0.7 44 0.5 41 0.2 48 0.2 43 0.2 14 0 15 0 18 0 32 0.1 44 0.2 40 0.7 47 0.4 55 0.8 45 0.4 50 21.4 44 18.1 51 3 48 3.4 51 3.3 45 4.5 57
SPS matting42.838.447.842.30.8 13 1.3 49 0.8 22 0.6 53 1.1 51 0.5 42 0.2 30 0.3 53 0.2 29 0 39 1.5 51 0 36 0.2 53 0.4 51 1 52 0.3 49 1.2 56 0.4 51 7.4 20 3.7 17 5.8 58 3.3 50 3.9 54 3.4 48
Comprehensive sampling43.742.144.144.81 39 1 36 1 39 0.5 47 0.8 45 0.5 47 0.2 39 0.3 47 0.2 44 0 19 0 22 0 33 0.1 39 0.3 47 0.9 50 0.3 50 0.9 48 0.3 48 23.2 46 20.1 56 1.8 36 4.6 58 3.8 52 5 61
LMSPIR43.841.84742.80.8 17 0.9 24 0.8 16 0.6 55 1.3 54 0.9 55 0.2 25 0.2 34 0.2 40 0 16 0.3 37 0 18 0.6 60 1.3 61 1.9 57 0.6 59 1.6 59 0.4 54 38.8 63 14.6 46 3.4 50 2.7 39 6 61 3.7 52
Robust Matting45.644.54448.31.1 47 2.6 59 1.1 50 0.9 58 2 58 1.1 57 0.2 5 0.2 11 0.2 7 0 35 0.1 33 0 38 0.6 59 1.1 60 2 59 0.4 51 0.5 37 0.4 57 17.3 39 9.5 32 7.2 59 5.2 62 6.3 62 4.7 59
Shared Matting (Real Time)46.444.847.546.91.3 54 2.4 57 1.4 57 1.4 59 2.5 59 1.5 59 0.2 47 0.3 57 0.2 50 0.1 43 1.3 50 0.1 48 0.2 51 0.3 50 0.7 45 0.4 52 0.9 49 0.4 55 11.2 26 6 24 1.2 22 2 26 2.3 34 2.8 39
SRLO Matting47.14551.145.30.9 34 1 38 0.9 35 0.8 57 1.7 57 1.1 58 0.2 44 0.2 40 0.3 54 0 30 0.5 40 0 29 0.4 56 0.5 54 1.9 58 0.8 61 2 61 0.6 58 35.2 62 25.6 60 5.6 57 1.6 16 4.9 59 1.6 13
Global Sampling Matting (filter version)47.747.845.549.80.9 33 0.8 23 1 43 0.5 48 1.2 52 0.7 52 0.2 38 0.3 49 0.2 30 0.1 44 0.7 43 0.1 46 0.2 52 0.6 56 1.1 54 0.4 56 1.7 60 0.4 56 32.3 57 7.3 26 16.6 62 3.6 54 4 55 4 55
Iterative Transductive Matting50.95146.455.31.7 59 1.6 55 1.4 56 0.7 56 1.4 55 1 56 0.3 58 0.3 56 0.3 59 0.1 42 0.6 41 0.1 47 0.1 30 0.2 43 0.9 51 0.5 58 0.9 50 0.6 59 35.2 61 7.9 27 7.6 60 2.9 44 3.2 44 3.9 54
Geodesic Matting53.253.652.353.83.6 61 3 61 3.4 63 3 62 3.4 61 3.4 63