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
TransMatting6.67.75.16.90.7 5 0.6 1 0.7 3 0.1 5 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 1 0 3 0 7 0.9 8 0.9 6 1.1 16 1.8 22 1.6 13 1.5 8
Random Walk Matting97.1136.90.8 8 0.8 11 0.8 10 0 1 0 1 0 1 0.2 33 0.2 30 0.2 36 0 1 0 1 0 1 0.1 5 0.4 53 0.1 1 0 7 0 6 0 4 0.2 1 0.2 1 0.6 1 1.2 1 1.2 1 1.2 1
TIMI-Net9.312.187.90.7 3 0.7 5 0.7 4 0.1 14 0.2 14 0.1 7 0.2 19 0.1 2 0.2 4 0000.1 24 0.1 6 0.1 4 0 5 0 5 0 2 0.9 7 0.8 5 1.1 14 1.6 13 1.8 19 1.8 20
SIM10.310.49.311.30.7 2 0.7 3 0.7 5 0.1 18 0.1 11 0.1 14 0.1 2 0.2 3 0.1 2 0 5 0 5 00.1 11 0.1 10 0.2 15 0 11 0 9 0 9 0.9 6 0.8 4 0.9 8 2.1 28 2 29 2.1 26
LFPNet11.81411.310.40.6 1 0.6 2 0.6 1 0.1 10 0.1 9 0.1 9 0.2 4 0.2 6 0.2 9 000 10 0.1 32 0.1 16 0.2 18 0 6 0 4 0 3 0.8 4 0.7 3 0.8 6 2.7 41 2.6 39 2.1 27
IamAlpha13.213.313.612.90.8 7 0.7 9 0.7 6 0.1 7 0.1 6 0.1 5 0.2 24 0.2 26 0.2 31 0000.1 4 0.1 7 0.1 5 0 13 0 10 0 6 1.1 12 1.1 10 1.1 13 2 26 2 27 2 24
Transfusive Weights13.3811.121.60.8 9 0.8 12 0.8 11 0 2 0 2 0.1 2 0.2 34 0.2 31 0.2 37 0 4 000.1 3 0.1 22 0.7 44 0 8 0 7 0 5 0.2 2 0.2 2 0.7 2 1.2 2 1.2 2 3.4 50
S²Matt13.41612.911.50.7 4 0.7 4 0.6 2 0.1 11 0.1 7 0.1 12 0.2 7 0.2 10 0.2 10 000 8 0.1 37 0.1 17 0.2 20 0 4 0 1 0 1 0.8 5 1.1 9 0.9 9 2.9 44 3 42 2.4 30
Background Matting1516.313.415.30.9 27 0.8 23 0.8 25 0.1 4 0.1 4 0.1 4 0.2 28 0.2 32 0.2 34 0000.1 27 0.1 8 0.1 12 0 9 0 12 0.1 13 1.4 14 1.3 11 1.1 15 1.3 5 1.3 4 1.3 4
PIIAMatting18.615.617.323.30.9 24 0.8 24 0.9 32 0.1 9 0.2 16 0.2 18 0.2 18 0.2 22 0.2 28 00 25 00.1 12 0.1 24 0.2 22 0 3 0 8 0.1 14 12.1 31 1.3 12 1.1 17 1.6 12 1.3 7 2.4 32
CCM19.720.120.818.10.7 6 0.8 10 0.7 9 0.4 47 0.6 43 0.6 51 0.2 9 0.2 11 0.2 7 0 13 0 9 0 17 0.1 17 0.1 15 0.4 28 0.1 25 0.3 28 0.1 24 15.4 38 12 38 0.7 3 1.4 6 1.5 12 1.4 6
Closed-Form Matting20.118.120.621.50.8 11 0.8 16 0.7 8 0.2 21 0.3 25 0.3 27 0.2 17 0.2 9 0.2 22 0 20 0 19 0 26 0.1 18 0.2 30 0.4 30 0.2 41 0.4 36 0.2 37 0.5 3 1.7 16 1 12 1.6 14 1.6 14 1.5 10
LNSP Matting20.423.520.317.50.8 12 0.7 6 0.8 14 0.2 22 0.3 24 0.2 21 0.2 11 0.2 8 0.2 6 0 17 0 20 0 25 0.1 13 0.1 9 0.1 7 0.2 31 0.5 37 0.1 26 25.9 52 12.3 40 1.1 20 2.1 30 1.8 18 1.9 21
Deep Matting2120.720.1221.1 49 1.1 43 1 46 0.1 16 0.1 13 0.1 10 0.1 1 0.1 1 0.1 3 0000.1 22 0.1 19 0.1 11 0 14 0 15 0.1 20 1 10 2.3 17 1.1 18 2.2 33 2.2 33 3.3 46
GCA Matting22.826.120.421.71.1 46 1.1 44 1 41 0.2 29 0.2 19 0.2 23 0.2 13 0.2 19 0.2 26 0000.1 42 0.1 18 0.1 13 0 17 0.1 19 0.1 11 1.1 13 1.3 13 1.3 26 1.9 23 1.5 11 1.6 12
VDRN Matting23.524.826.419.40.9 37 0.9 32 0.9 31 0.1 17 0.2 18 0.2 17 0.2 23 0.2 29 0.2 27 0 2 0 2 0 3 0.1 48 0.2 36 0.2 21 0 10 0 13 0 8 18.3 42 18.3 53 1.5 30 1.7 19 2 28 1.7 18
AdaMatting23.520.92623.61.1 50 1.1 45 1.1 49 0.1 6 0.2 21 0.2 22 0.2 41 0.2 40 0.2 47 000 9 0.1 23 0.1 25 0.1 9 0 2 0 2 0.1 21 6.8 20 13.3 43 1.4 29 1.3 4 1.3 6 1.3 3
IndexNet Matting2624.62726.41.3 54 1.3 52 1.3 55 0.1 15 0.1 12 0.1 15 0.2 8 0.2 25 0.2 11 00 27 00.1 46 0.1 26 0.3 26 0 15 0.1 22 0.2 29 10 24 10.7 35 1.8 36 1.6 10 1.7 17 1.6 13
ATNet Matting26.125.127.725.50.9 26 1.2 46 0.9 33 0.1 3 0.1 5 0.1 6 0.2 36 0.2 45 0.2 42 000 2 0.3 55 0.3 45 0.6 35 0 12 0 11 0.1 12 11.9 29 9.6 34 3.5 52 1.6 15 1.4 8 1.9 22
Context-aware Matting26.628.625.625.51.2 53 1.2 47 1.2 52 0.1 13 0.1 8 0.1 11 0.3 55 0.3 49 0.3 52 0 3 0 8 0 5 0.1 33 0.1 14 0.1 3 0 19 0.2 25 0.1 19 14.9 35 14.3 45 2.4 45 1.7 18 1.5 9 1.7 17
SampleNet Matting26.728.423.9280.9 23 0.9 31 0.8 23 0.1 8 0.1 10 0.1 8 0.2 35 0.2 39 0.2 39 00 3 0 11 0.1 44 0.1 23 0.2 24 0 18 0.1 17 0.2 30 1.5 15 1.5 14 1.8 35 3.8 56 3.9 54 3.8 54
Large Kernel Matting26.828.125.826.61 44 0.9 28 0.9 38 0.2 28 0.4 34 0.3 26 0.2 22 0.2 27 0.2 33 0 24 0 17 0 20 0.1 26 0.2 31 0.5 32 0.2 43 0.4 34 0.2 34 3.3 17 1.6 15 0.8 5 1.8 21 1.8 20 2 25
Three Stages Matting27.126.43123.90.8 10 0.7 8 0.7 7 0.2 24 0.3 26 0.3 28 0.2 16 0.2 16 0.2 19 0 27 0 13 0 35 0.1 38 0.2 42 0.6 39 0.1 23 1.4 58 0.1 16 26.4 53 28.1 62 1.5 31 1.8 20 1.9 23 1.6 16
FE2E High-Quality Matting27.428.927.925.80.9 36 1 42 0.9 34 0.1 19 0.2 22 0.2 19 0.2 21 0.2 21 0.2 23 00 4 0 7 0.2 51 0.2 39 0.6 34 0.1 21 0.1 21 0.1 15 5.3 19 10.7 36 2.2 43 2.3 35 2.6 38 2.4 31
Three-layer graph matting27.525.528.928.30.9 25 0.8 15 0.8 12 0.3 36 0.3 30 0.4 38 0.2 37 0.2 37 0.2 32 0 9 0 28 0 14 0.1 1 0.1 1 0.7 47 0.1 27 0.4 35 0.1 28 34.7 61 35.5 64 2.3 44 1.5 8 1.9 21 1.6 11
A2U Matting27.630.428.324.50.8 17 0.8 21 0.8 15 0.2 20 0.2 15 0.1 13 0.2 43 0.2 38 0.2 40 000 6 0.1 41 0.2 40 0.3 27 0.1 20 0.1 18 0.1 17 1 11 0.9 7 1.1 19 4.8 61 4.6 59 4.5 59
SVR Matting27.929.926.427.41.2 51 1 34 1.1 50 0.3 35 0.5 37 0.4 35 0.3 51 0.2 46 0.2 48 0 11 0 16 0 31 0.1 15 0.2 32 0.2 19 0.1 26 0.1 20 0.1 18 20.3 43 4.8 21 1 11 1.5 7 1.3 5 1.4 7
DCNN Matting28.228.126.330.11 43 1 38 1 48 0.2 31 0.3 29 0.3 32 0.2 38 0.2 33 0.2 35 0 14 0 15 0 13 0.1 2 0.1 2 0.1 2 0.1 22 0.1 16 0.1 23 20.4 44 12.4 41 3.1 50 2.1 31 2.4 36 2.6 38
Improved color matting28.830.826.129.60.8 14 0.8 17 0.8 22 0.3 39 0.6 39 0.5 41 0.2 29 0.2 18 0.2 18 0 21 0 12 0 22 0.1 29 0.2 29 0.6 42 0.1 24 0.1 23 0.1 22 29.5 56 15.6 49 1.8 34 2.3 34 1.9 22 2.4 36
LocalSamplingAndKnnClassification2930.928.627.40.8 16 0.8 14 0.8 19 0.2 23 0.3 27 0.3 25 0.2 27 0.2 20 0.2 21 0 32 0 23 0 19 0.1 36 0.2 38 0.7 45 0.2 42 0.4 33 0.3 40 32.9 60 22 59 2 41 1.6 11 1.7 15 1.5 9
Cell-based matting Laplacian30.231.627.431.50.9 29 0.8 18 0.8 26 0.4 42 1.3 54 0.5 44 0.2 30 0.2 23 0.2 24 0 41 0.1 34 0.1 49 0.1 25 0.1 27 0.6 38 0.4 55 0.3 29 0.3 44 11.5 28 8.5 31 1.3 25 1.2 3 1.3 3 1.2 2
Local Spline Regression (LSR)30.235.130.5250.9 30 0.7 7 0.8 13 0.2 25 0.3 31 0.3 33 0.2 44 0.2 34 0.2 25 0 26 0 26 0 28 0.1 30 0.2 37 0.4 29 0.2 44 0.3 30 0.2 36 39.2 65 32.8 63 1.2 21 1.6 17 1.7 16 1.6 15
HDMatt31.336.327.6301.5 59 1.3 51 1.3 56 0.3 37 0.3 23 0.3 30 0.3 54 0.3 51 0.3 56 0000.1 43 0.1 12 0.1 6 0 16 0 14 0 10 0.9 9 0.9 8 1.2 24 2.4 36 2.2 34 2.3 28
Information-flow matting31.630.830.933.31 39 1 35 1 43 0.4 45 0.5 36 0.5 47 0.2 42 0.2 42 0.2 44 0 7 0 24 0 34 0.1 10 0.1 4 0.1 8 0.1 29 0.3 26 0.1 27 25 50 15.8 50 1.9 40 1.9 24 2.1 30 1.9 23
Learning Based Matting32.132.43231.90.8 18 0.8 19 0.8 16 0.1 12 0.2 17 0.2 16 0.2 14 0.2 7 0.2 16 0 23 0 21 0 24 0.6 59 1.1 60 2.1 61 0.2 30 0.3 27 0.2 31 22.5 46 13.3 44 1.3 27 4.3 57 5.9 61 8.5 64
TSPS-RV Matting3333.832.3330.9 28 0.8 20 0.9 30 0.2 26 0.4 32 0.3 24 0.2 46 0.2 43 0.2 38 0 6 0 10 0 16 0.1 21 0.2 34 0.6 37 0.2 39 0.6 39 0.1 25 25.3 51 9.1 32 2.1 42 3.5 53 3.4 48 3.7 52
Patch-based Matting34.63337.433.40.9 32 0.8 22 0.9 29 0.3 38 0.5 38 0.4 37 0.2 15 0.2 15 0.2 20 0 12 0 14 0 21 0.1 49 0.3 50 0.6 36 0.2 33 0.9 48 0.2 39 10.2 25 22.5 60 1.4 28 4.8 60 3.6 52 4.1 57
KNN Matting35.338.933.1343.4 61 2.8 61 3.1 63 0.3 41 0.5 35 0.4 39 0.2 32 0.2 36 0.2 46 0 29 0 7 0.1 45 0.1 19 0.2 28 0.2 17 0.3 49 0.7 43 0.4 53 17.8 41 8 29 0.8 4 2.6 39 2 26 1.3 5
ATPM Matting35.638.934.433.50.9 33 0.9 27 0.8 27 0.2 30 0.3 28 0.3 31 0.2 50 0.3 52 0.2 43 0 36 0.1 31 0 41 0.1 39 0.1 21 0.2 14 0.3 46 0.7 44 0.3 42 12.1 30 5 22 1.2 22 3.1 47 3.5 50 3.3 48
Improving Sampling Criterion35.63336.637.30.8 13 0.9 29 0.9 35 0.3 40 0.8 47 0.3 29 0.2 12 0.2 17 0.2 13 0 40 1.1 49 0 37 0.3 56 0.6 56 1.2 57 0.3 48 0.7 45 0.2 38 5.3 18 4.2 19 4.1 54 2.4 37 2.1 31 2.4 35
Segmentation-based matting35.735.437.134.60.8 21 1.7 57 0.8 17 0.3 33 0.4 33 0.4 36 0.2 25 0.2 13 0.2 17 0 25 0 11 0 23 0.1 35 0.3 46 1.1 54 0.2 38 0.3 31 0.3 48 29.5 57 38.5 65 1.8 39 3.1 49 2.8 41 3 43
Global Sampling Matting35.832.838.136.40.8 20 0.8 13 0.8 21 0.2 32 0.6 44 0.4 40 0.2 20 0.2 14 0.2 12 0 28 0.4 38 0 27 0.1 20 0.3 47 0.6 41 0.2 37 1.1 56 0.3 43 32.7 59 14.5 46 5 56 3 46 3.4 47 3.4 51
High-res matting36.735.442.432.30.8 22 2.5 59 0.8 20 0.5 52 1.1 51 0.7 54 0.2 3 0.2 4 0.2 5 0 22 0.7 44 0 15 0.2 50 0.4 54 2.8 63 0.4 58 1.1 55 0.3 50 8.4 22 5.2 23 1 10 3.6 54 3.5 49 2.9 41
AlphaGAN37.442.436.434.11.2 52 1.3 49 1.2 53 0.2 27 0.2 20 0.2 20 0.4 62 0.4 59 0.3 62 00 6 0 4 0.1 34 0.2 33 0.2 16 0.2 36 0.2 24 0.3 41 15.2 36 12.8 42 1.5 32 3.3 50 4.2 58 3.1 45
CSC Matting38.8383444.41.5 57 1.5 55 1.8 59 0.3 34 0.6 42 0.4 34 0.3 56 0.2 28 0.2 49 0 34 0.1 29 0.1 50 0.1 7 0.1 3 0.2 23 0.3 45 0.7 42 0.3 46 13.2 33 14.9 48 4.5 55 2.6 38 2 25 2.8 39
LNCLM matting3938.338.939.91 41 1 36 0.8 28 0.5 51 0.6 40 0.5 46 0.3 57 0.3 56 0.3 58 0 38 0.1 32 0.1 43 0.1 6 0.1 20 0.5 31 0.2 32 0.4 32 0.2 33 16.1 39 19.7 55 1.8 38 2.8 42 2.8 40 2.9 42
Shared Matting3936.943.636.60.9 31 1.4 54 0.9 37 0.6 55 1.4 57 0.8 55 0.2 10 0.2 24 0.2 14 0 37 0.7 45 0.1 44 0.1 28 0.2 35 0.8 49 0.3 47 1 54 0.4 54 28.2 55 19.8 56 0.9 7 2.1 32 1.9 24 2.4 33
Comprehensive Weighted Color and Texture39.53245.141.41 45 1.2 48 1 47 0.5 50 0.8 48 0.6 52 0.3 52 0.3 55 0.3 57 0 8 0.3 36 0 30 0.1 9 0.2 43 0.7 43 0.2 34 0.6 40 0.2 35 24.4 49 19 54 2.6 48 1.5 9 2.5 37 1.8 19
Sparse coded matting403937.643.31.4 56 1 40 1.3 54 0.6 53 0.9 49 0.5 49 0.3 60 0.4 60 0.3 61 0 31 0.1 30 0 42 0.1 14 0.1 13 0.5 33 0.2 35 1 53 0.2 32 14.3 34 5.5 24 2.4 46 2.1 29 2.2 32 2.3 29
Weighted Color and Texture Matting40.136.443.840.11 42 1 41 1 45 0.4 43 1 50 0.5 50 0.2 47 0.3 47 0.2 50 0 33 1 48 0 12 0.1 47 0.3 49 0.8 50 0.1 28 0.6 41 0.3 47 11 26 8.4 30 1.7 33 2 25 3.2 44 2.4 34
Graph-based sparse matting41.74042.542.61.1 47 0.9 33 1 42 0.4 44 0.6 41 0.5 45 0.3 58 0.3 53 0.3 54 0 18 0.2 35 0 40 0.1 16 0.1 11 0.2 25 0.2 40 0.9 52 0.3 45 27.6 54 22 58 3.6 53 2.9 43 4.1 57 2.5 37
KL-Divergence Based Sparse Sampling41.843.340.341.81 38 0.9 30 0.9 39 0.4 46 0.7 45 0.5 42 0.2 49 0.2 44 0.2 15 0 15 0 18 0 32 0.1 45 0.2 41 0.7 48 0.4 56 0.8 46 0.4 51 21.4 45 18.1 52 3 49 3.4 52 3.3 46 4.5 58
SPS matting43.739.448.643.10.8 15 1.3 50 0.8 24 0.6 54 1.1 52 0.5 43 0.2 31 0.3 54 0.2 29 0 39 1.5 51 0 36 0.2 54 0.4 52 1 53 0.3 50 1.2 57 0.4 52 7.4 21 3.7 18 5.8 59 3.3 51 3.9 55 3.4 49
Comprehensive sampling44.5434545.61 40 1 37 1 40 0.5 48 0.8 46 0.5 48 0.2 40 0.3 48 0.2 45 0 19 0 22 0 33 0.1 40 0.3 48 0.9 51 0.3 51 0.9 49 0.3 49 23.2 47 20.1 57 1.8 37 4.6 59 3.8 53 5 62
LMSPIR44.842.84843.80.8 19 0.9 26 0.8 18 0.6 56 1.3 55 0.9 56 0.2 26 0.2 35 0.2 41 0 16 0.3 37 0 18 0.6 61 1.3 62 1.9 58 0.6 60 1.6 60 0.4 55 38.8 64 14.6 47 3.4 51 2.7 40 6 62 3.7 53
Robust Matting46.545.444.949.11.1 48 2.6 60 1.1 51 0.9 59 2 59 1.1 58 0.2 6 0.2 12 0.2 8 0 35 0.1 33 0 38 0.6 60 1.1 61 2 60 0.4 52 0.5 38 0.4 58 17.3 40 9.5 33 7.2 60 5.2 63 6.3 63 4.7 60
Shared Matting (Real Time)47.345.648.447.81.3 55 2.4 58 1.4 58 1.4 60 2.5 60 1.5 60 0.2 48 0.3 58 0.2 51 0.1 43 1.3 50 0.1 48 0.2 52 0.3 51 0.7 46 0.4 53 0.9 50 0.4 56 11.2 27 6 25 1.2 23 2 27 2.3 35 2.8 40
SRLO Matting4845.85246.10.9 35 1 39 0.9 36 0.8 58 1.7 58 1.1 59 0.2 45 0.2 41 0.3 55 0 30 0.5 40 0 29 0.4 57 0.5 55 1.9 59 0.8 62 2 62 0.6 59 35.2 63 25.6 61 5.6 58 1.6 16 4.9 60 1.6 14
Global Sampling Matting (filter version)48.548.646.550.50.9 34 0.8 25 1 44 0.5 49 1.2 53 0.7 53 0.2 39 0.3 50 0.2 30 0.1 44 0.7 43 0.1 46 0.2 53 0.6 57 1.1 55 0.4 57 1.7 61 0.4 57 32.3 58 7.3 27 16.6 63 3.6 55 4 56 4 56
Iterative Transductive Matting51.851.947.356.11.7 60 1.6 56 1.4 57 0.7 57 1.4 56 1 57 0.3 59 0.3 57 0.3 60 0.1