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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
TransMatting6.87.95.37.10.7 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 2 0 4 0 8 0.9 8 0.9 6 1.1 17 1.8 22 1.6 13 1.5 8
Random Walk Matting9.47.513.57.10.8 9 0.8 12 0.8 11 0 1 0 1 0 1 0.2 34 0.2 31 0.2 37 0 1 0 1 0 1 0.1 5 0.4 54 0.1 1 0 8 0 7 0 4 0.2 1 0.2 1 0.6 1 1.2 1 1.2 1 1.2 1
TIMI-Net9.612.68.180.7 3 0.7 5 0.7 4 0.1 14 0.2 14 0.1 7 0.2 20 0.1 2 0.2 4 0000.1 25 0.1 6 0.1 4 0 6 0 6 0 2 0.9 7 0.8 5 1.1 15 1.6 13 1.8 19 1.8 20
SIM10.410.59.411.40.7 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 12 0 10 0 10 0.9 6 0.8 4 0.9 8 2.1 28 2 29 2.1 26
LFPNet1214.311.410.50.6 1 0.6 2 0.6 1 0.1 10 0.1 9 0.1 9 0.2 4 0.2 6 0.2 10 000 10 0.1 33 0.1 16 0.2 18 0 7 0 5 0 3 0.8 4 0.7 3 0.8 6 2.7 41 2.6 39 2.1 27
S²Matt13.716.413.411.60.7 4 0.7 4 0.6 2 0.1 11 0.1 7 0.1 12 0.2 8 0.2 11 0.2 11 000 8 0.1 38 0.1 18 0.2 20 0 5 0 2 0 1 0.8 5 1.1 10 0.9 9 2.9 44 3 42 2.4 30
IamAlpha13.813.914.113.40.8 8 0.7 10 0.7 7 0.1 7 0.1 6 0.1 5 0.2 25 0.2 27 0.2 32 0000.1 4 0.1 7 0.1 5 0 14 0 11 0 7 1.1 13 1.1 11 1.1 14 2 26 2 27 2 24
Transfusive Weights13.88.411.722.10.8 10 0.8 13 0.8 12 0 2 0 2 0.1 2 0.2 35 0.2 32 0.2 38 0 4 000.1 3 0.1 23 0.7 45 0 9 0 8 0 5 0.2 2 0.2 2 0.7 2 1.2 2 1.2 2 3.4 51
Background Matting15.6171415.90.9 28 0.8 24 0.8 26 0.1 4 0.1 4 0.1 4 0.2 29 0.2 33 0.2 35 0000.1 28 0.1 8 0.1 12 0 10 0 13 0.1 14 1.4 15 1.3 12 1.1 16 1.3 5 1.3 4 1.3 4
TMFNet16.316.315.916.70.7 6 0.7 6 0.7 6 0.2 24 0.3 27 0.2 18 0.2 6 0.2 7 0.2 8 0000.1 17 0.1 17 0.2 24 0 1 0 1 0 6 1 10 1 9 1.1 13 3.2 50 3.2 44 2.9 42
PIIAMatting19.316.117.9240.9 25 0.8 25 0.9 33 0.1 9 0.2 16 0.2 19 0.2 19 0.2 23 0.2 29 00 25 00.1 12 0.1 25 0.2 22 0 4 0 9 0.1 15 12.1 32 1.3 13 1.1 18 1.6 12 1.3 7 2.4 32
CCM20.320.921.418.60.7 7 0.8 11 0.7 10 0.4 48 0.6 44 0.6 52 0.2 10 0.2 12 0.2 7 0 13 0 9 0 17 0.1 18 0.1 15 0.4 29 0.1 26 0.3 29 0.1 25 15.4 39 12 39 0.7 3 1.4 6 1.5 12 1.4 6
Closed-Form Matting20.718.621.322.10.8 12 0.8 17 0.7 9 0.2 21 0.3 25 0.3 28 0.2 18 0.2 10 0.2 23 0 20 0 19 0 26 0.1 19 0.2 31 0.4 31 0.2 42 0.4 37 0.2 38 0.5 3 1.7 17 1 12 1.6 14 1.6 14 1.5 10
LNSP Matting20.92420.8180.8 13 0.7 7 0.8 15 0.2 22 0.3 24 0.2 22 0.2 12 0.2 9 0.2 6 0 17 0 20 0 25 0.1 13 0.1 9 0.1 7 0.2 32 0.5 38 0.1 27 25.9 53 12.3 41 1.1 21 2.1 30 1.8 18 1.9 21
Deep Matting21.521.320.722.61.1 50 1.1 44 1 47 0.1 16 0.1 13 0.1 10 0.1 1 0.1 1 0.1 3 0000.1 23 0.1 20 0.1 11 0 15 0 16 0.1 21 1 11 2.3 18 1.1 19 2.2 33 2.2 33 3.3 47
GCA Matting23.52721.122.41.1 47 1.1 45 1 42 0.2 30 0.2 19 0.2 24 0.2 14 0.2 20 0.2 27 0000.1 43 0.1 19 0.1 13 0 18 0.1 20 0.1 12 1.1 14 1.3 14 1.3 27 1.9 23 1.5 11 1.6 12
VDRN Matting24.125.42719.90.9 38 0.9 33 0.9 32 0.1 17 0.2 18 0.2 17 0.2 24 0.2 30 0.2 28 0 2 0 2 0 3 0.1 49 0.2 37 0.2 21 0 11 0 14 0 9 18.3 43 18.3 54 1.5 31 1.7 19 2 28 1.7 18
AdaMatting24.221.626.724.31.1 51 1.1 46 1.1 50 0.1 6 0.2 21 0.2 23 0.2 42 0.2 41 0.2 48 000 9 0.1 24 0.1 26 0.1 9 0 3 0 3 0.1 22 6.8 21 13.3 44 1.4 30 1.3 4 1.3 6 1.3 3
IndexNet Matting26.725.327.627.11.3 55 1.3 53 1.3 56 0.1 15 0.1 12 0.1 15 0.2 9 0.2 26 0.2 12 00 27 00.1 47 0.1 27 0.3 27 0 16 0.1 23 0.2 30 10 25 10.7 36 1.8 37 1.6 10 1.7 17 1.6 13
ATNet Matting26.825.928.426.10.9 27 1.2 47 0.9 34 0.1 3 0.1 5 0.1 6 0.2 37 0.2 46 0.2 43 000 2 0.3 56 0.3 46 0.6 36 0 13 0 12 0.1 13 11.9 30 9.6 35 3.5 53 1.6 15 1.4 8 1.9 22
Context-aware Matting27.129.326.1261.2 54 1.2 48 1.2 53 0.1 13 0.1 8 0.1 11 0.3 56 0.3 50 0.3 53 0 3 0 8 0 5 0.1 34 0.1 14 0.1 3 0 20 0.2 26 0.1 20 14.9 36 14.3 46 2.4 46 1.7 18 1.5 9 1.7 17
SampleNet Matting27.529.324.628.80.9 24 0.9 32 0.8 24 0.1 8 0.1 10 0.1 8 0.2 36 0.2 40 0.2 40 00 3 0 11 0.1 45 0.1 24 0.2 25 0 19 0.1 18 0.2 31 1.5 16 1.5 15 1.8 36 3.8 57 3.9 55 3.8 55
Large Kernel Matting27.528.926.527.31 45 0.9 29 0.9 39 0.2 29 0.4 35 0.3 27 0.2 23 0.2 28 0.2 34 0 24 0 17 0 20 0.1 27 0.2 32 0.5 33 0.2 44 0.4 35 0.2 35 3.3 18 1.6 16 0.8 5 1.8 21 1.8 20 2 25
Three Stages Matting27.827.131.624.60.8 11 0.7 9 0.7 8 0.2 25 0.3 26 0.3 29 0.2 17 0.2 17 0.2 20 0 27 0 13 0 35 0.1 39 0.2 43 0.6 40 0.1 24 1.4 59 0.1 17 26.4 54 28.1 63 1.5 32 1.8 20 1.9 23 1.6 16
FE2E High-Quality Matting28.129.628.526.50.9 37 1 43 0.9 35 0.1 19 0.2 22 0.2 20 0.2 22 0.2 22 0.2 24 00 4 0 7 0.2 52 0.2 40 0.6 35 0.1 22 0.1 22 0.1 16 5.3 20 10.7 37 2.2 44 2.3 35 2.6 38 2.4 31
Three-layer graph matting28.226.129.5290.9 26 0.8 16 0.8 13 0.3 37 0.3 31 0.4 39 0.2 38 0.2 38 0.2 33 0 9 0 28 0 14 0.1 1 0.1 1 0.7 48 0.1 28 0.4 36 0.1 29 34.7 62 35.5 65 2.3 45 1.5 8 1.9 21 1.6 11
A2U Matting28.431.32925.30.8 18 0.8 22 0.8 16 0.2 20 0.2 15 0.1 13 0.2 44 0.2 39 0.2 41 000 6 0.1 42 0.2 41 0.3 28 0.1 21 0.1 19 0.1 18 1 12 0.9 7 1.1 20 4.8 62 4.6 60 4.5 60
SVR Matting28.530.527.127.91.2 52 1 35 1.1 51 0.3 36 0.5 38 0.4 36 0.3 52 0.2 47 0.2 49 0 11 0 16 0 31 0.1 15 0.2 33 0.2 19 0.1 27 0.1 21 0.1 19 20.3 44 4.8 22 1 11 1.5 7 1.3 5 1.4 7
DCNN Matting28.828.826.930.81 44 1 39 1 49 0.2 32 0.3 30 0.3 33 0.2 39 0.2 34 0.2 36 0 14 0 15 0 13 0.1 2 0.1 2 0.1 2 0.1 23 0.1 17 0.1 24 20.4 45 12.4 42 3.1 51 2.1 31 2.4 36 2.6 38
Improved color matting29.631.526.930.40.8 15 0.8 18 0.8 23 0.3 40 0.6 40 0.5 42 0.2 30 0.2 19 0.2 19 0 21 0 12 0 22 0.1 30 0.2 30 0.6 43 0.1 25 0.1 24 0.1 23 29.5 57 15.6 50 1.8 35 2.3 34 1.9 22 2.4 36
LocalSamplingAndKnnClassification29.731.529.428.10.8 17 0.8 15 0.8 20 0.2 23 0.3 28 0.3 26 0.2 28 0.2 21 0.2 22 0 32 0 23 0 19 0.1 37 0.2 39 0.7 46 0.2 43 0.4 34 0.3 41 32.9 61 22 60 2 42 1.6 11 1.7 15 1.5 9
Cell-based matting Laplacian30.932.428.132.30.9 30 0.8 19 0.8 27 0.4 43 1.3 55 0.5 45 0.2 31 0.2 24 0.2 25 0 41 0.1 34 0.1 49 0.1 26 0.1 28 0.6 39 0.4 56 0.3 30 0.3 45 11.5 29 8.5 32 1.3 26 1.2 3 1.3 3 1.2 2
Local Spline Regression (LSR)3135.931.325.80.9 31 0.7 8 0.8 14 0.2 26 0.3 32 0.3 34 0.2 45 0.2 35 0.2 26 0 26 0 26 0 28 0.1 31 0.2 38 0.4 30 0.2 45 0.3 31 0.2 37 39.2 66 32.8 64 1.2 22 1.6 17 1.7 16 1.6 15
HDMatt31.9372830.71.5 60 1.3 52 1.3 57 0.3 38 0.3 23 0.3 31 0.3 55 0.3 52 0.3 57 0000.1 44 0.1 12 0.1 6 0 17 0 15 0 11 0.9 9 0.9 8 1.2 25 2.4 36 2.2 34 2.3 28
Information-flow matting32.331.431.533.91 40 1 36 1 44 0.4 46 0.5 37 0.5 48 0.2 43 0.2 43 0.2 45 0 7 0 24 0 34 0.1 10 0.1 4 0.1 8 0.1 30 0.3 27 0.1 28 25 51 15.8 51 1.9 41 1.9 24 2.1 30 1.9 23
Learning Based Matting32.833.132.832.60.8 19 0.8 20 0.8 17 0.1 12 0.2 17 0.2 16 0.2 15 0.2 8 0.2 17 0 23 0 21 0 24 0.6 60 1.1 61 2.1 62 0.2 31 0.3 28 0.2 32 22.5 47 13.3 45 1.3 28 4.3 58 5.9 62 8.5 65
TSPS-RV Matting33.934.633.133.90.9 29 0.8 21 0.9 31 0.2 27 0.4 33 0.3 25 0.2 47 0.2 44 0.2 39 0 6 0 10 0 16 0.1 22 0.2 35 0.6 38 0.2 40 0.6 40 0.1 26 25.3 52 9.1 33 2.1 43 3.5 54 3.4 49 3.7 53
Patch-based Matting35.533.938.334.30.9 33 0.8 23 0.9 30 0.3 39 0.5 39 0.4 38 0.2 16 0.2 16 0.2 21 0 12 0 14 0 21 0.1 50 0.3 51 0.6 37 0.2 34 0.9 49 0.2 40 10.2 26 22.5 61 1.4 29 4.8 61 3.6 53 4.1 58
KNN Matting3639.633.934.53.4 62 2.8 62 3.1 64 0.3 42 0.5 36 0.4 40 0.2 33 0.2 37 0.2 47 0 29 0 7 0.1 45 0.1 20 0.2 29 0.2 17 0.3 50 0.7 44 0.4 54 17.8 42 8 30 0.8 4 2.6 39 2 26 1.3 5
Improving Sampling Criterion36.433.837.4380.8 14 0.9 30 0.9 36 0.3 41 0.8 48 0.3 30 0.2 13 0.2 18 0.2 14 0 40 1.1 49 0 37 0.3 57 0.6 57 1.2 58 0.3 49 0.7 46 0.2 39 5.3 19 4.2 20 4.1 55 2.4 37 2.1 31 2.4 35
ATPM Matting36.439.635.334.30.9 34 0.9 28 0.8 28 0.2 31 0.3 29 0.3 32 0.2 51 0.3 53 0.2 44 0 36 0.1 31 0 41 0.1 40 0.1 22 0.2 14 0.3 47 0.7 45 0.3 43 12.1 31 5 23 1.2 23 3.1 47 3.5 51 3.3 49
Segmentation-based matting36.536.137.935.50.8 22 1.7 58 0.8 18 0.3 34 0.4 34 0.4 37 0.2 26 0.2 14 0.2 18 0 25 0 11 0 23 0.1 36 0.3 47 1.1 55 0.2 39 0.3 32 0.3 49 29.5 58 38.5 66 1.8 40 3.1 49 2.8 41 3 44
Global Sampling Matting36.633.53937.30.8 21 0.8 14 0.8 22 0.2 33 0.6 45 0.4 41 0.2 21 0.2 15 0.2 13 0 28 0.4 38 0 27 0.1 21 0.3 48 0.6 42 0.2 38 1.1 57 0.3 44 32.7 60 14.5 47 5 57 3 46 3.4 48 3.4 52
High-res matting37.336.143.132.80.8 23 2.5 60 0.8 21 0.5 53 1.1 52 0.7 55 0.2 3 0.2 4 0.2 5 0 22 0.7 44 0 15 0.2 51 0.4 55 2.8 64 0.4 59 1.1 56 0.3 51 8.4 23 5.2 24 1 10 3.6 55 3.5 50 2.9 41
AlphaGAN38.343.437.134.91.2 53 1.3 50 1.2 54 0.2 28 0.2 20 0.2 21 0.4 63 0.4 60 0.3 63 00 6 0 4 0.1 35 0.2 34 0.2 16 0.2 37 0.2 25 0.3 42 15.2 37 12.8 43 1.5 33 3.3 51 4.2 59 3.1 46
CSC Matting39.438.634.6451.5 58 1.5 56 1.8 60 0.3 35 0.6 43 0.4 35 0.3 57 0.2 29 0.2 50 0 34 0.1 29 0.1 50 0.1 7 0.1 3 0.2 23 0.3 46 0.7 43 0.3 47 13.2 34 14.9 49 4.5 56 2.6 38 2 25 2.8 39
Shared Matting39.837.644.437.30.9 32 1.4 55 0.9 38 0.6 56 1.4 58 0.8 56 0.2 11 0.2 25 0.2 15 0 37 0.7 45 0.1 44 0.1 29 0.2 36 0.8 50 0.3 48 1 55 0.4 55 28.2 56 19.8 57 0.9 7 2.1 32 1.9 24 2.4 33
LNCLM matting39.838.939.640.81 42 1 37 0.8 29 0.5 52 0.6 41 0.5 47 0.3 58 0.3 57 0.3 59 0 38 0.1 32 0.1 43 0.1 6 0.1 21 0.5 32 0.2 33 0.4 33 0.2 34 16.1 40 19.7 56 1.8 39 2.8 42 2.8 40 2.9 43
Comprehensive Weighted Color and Texture40.232.645.942.11 46 1.2 49 1 48 0.5 51 0.8 49 0.6 53 0.3 53 0.3 56 0.3 58 0 8 0.3 36 0 30 0.1 9 0.2 44 0.7 44 0.2 35 0.6 41 0.2 36 24.4 50 19 55 2.6 49 1.5 9 2.5 37 1.8 19
Sparse coded matting40.639.638.3441.4 57 1 41 1.3 55 0.6 54 0.9 50 0.5 50 0.3 61 0.4 61 0.3 62 0 31 0.1 30 0 42 0.1 14 0.1 13 0.5 34 0.2 36 1 54 0.2 33 14.3 35 5.5 25 2.4 47 2.1 29 2.2 32 2.3 29
Weighted Color and Texture Matting40.937.144.640.91 43 1 42 1 46 0.4 44 1 51 0.5 51 0.2 48 0.3 48 0.2 51 0 33 1 48 0 12 0.1 48 0.3 50 0.8 51 0.1 29 0.6 42 0.3 48 11 27 8.4 31 1.7 34 2 25 3.2 45 2.4 34
Graph-based sparse matting42.440.643.343.41.1 48 0.9 34 1 43 0.4 45 0.6 42 0.5 46 0.3 59 0.3 54 0.3 55 0 18 0.2 35 0 40 0.1 16 0.1 11 0.2 26 0.2 41 0.9 53 0.3 46 27.6 55 22 59 3.6 54 2.9 43 4.1 58 2.5 37
KL-Divergence Based Sparse Sampling42.644.141.142.61 39 0.9 31 0.9 40 0.4 47 0.7 46 0.5 43 0.2 50 0.2 45 0.2 16 0 15 0 18 0 32 0.1 46 0.2 42 0.7 49 0.4 57 0.8 47 0.4 52 21.4 46 18.1 53 3 50 3.4 53 3.3 47 4.5 59
SPS matting44.640.349.5440.8 16 1.3 51 0.8 25 0.6 55 1.1 53 0.5 44 0.2 32 0.3 55 0.2 30 0 39 1.5 51 0 36 0.2 55 0.4 53 1 54 0.3 51 1.2 58 0.4 53 7.4 22 3.7 19 5.8 60 3.3 52 3.9 56 3.4 50
Comprehensive sampling45.443.945.946.51 41 1 38 1 41 0.5 49 0.8 47 0.5 49 0.2 41 0.3 49 0.2 46 0 19 0 22 0 33 0.1 41 0.3 49 0.9 52 0.3 52 0.9 50 0.3 50 23.2 48 20.1 58 1.8 38 4.6 60 3.8 54 5 63
LMSPIR45.743.548.944.60.8 20 0.9 27 0.8 19 0.6 57 1.3 56 0.9 57 0.2 27 0.2 36 0.2 42 0 16 0.3 37 0 18 0.6 62 1.3 63 1.9 59 0.6 61 1.6 61 0.4 56 38.8 65 14.6 48 3.4 52 2.7 40 6 63 3.7 54
Robust Matting47.346.345.8501.1 49 2.6 61 1.1 52 0.9 60 2 60 1.1 59 0.2 7 0.2 13 0.2 9 0 35 0.1 33 0 38 0.6 61 1.1 62 2 61 0.4 53 0.5 39 0.4 59 17.3 41 9.5 34 7.2 61 5.2 64 6.3 64 4.7 61
Shared Matting (Real Time)4846.449.148.51.3 56 2.4 59 1.4 59 1.4 61 2.5 61 1.5 61 0.2 49 0.3 59 0.2 52 0.1 43 1.3 50 0.1 48 0.2 53 0.3 52 0.7 47 0.4 54 0.9 51 0.4 57 11.2 28 6 26 1.2 24 2 27 2.3 35 2.8 40
SRLO Matting48.846.552.946.90.9 36 1 40 0.9 37 0.8 59 1.7 59 1.1 60 0.2 46 0.2 42 0.3 56 0 30 0.5 40 0 29 0.4 58 0.5 56 1.9 60 0.8 63 2 63 0.6 60 35.2 64 25.6 62 5.6 59 1.6 16 4.9 61 1.6 14
Global Sampling Matting (filter version)49.449.547.451.40.9 35 0.8 26 1 45 0.5 50 1.2 54 0.7 54 0.2 40 0.3 51 0.2 31 0.1 44 0.7 43 0.1 46 0.2 54