Alpha Matting Evaluation Website
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Image matting evaluation results      Competition:   Low resolution  High resolution  
Error type:  SAD   MSE   Gradient   Connectivity  
Gradient 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
LFPNet2.32.32.12.50.1 1 0.1 1 0.1 1 0.1 3 0.1 2 0.2 5 0.1 2 0.1 2 0.1 1 0.1 2 0.1 2 0.3 4 0.7 1 0.7 1 1.1 1 0.3 2 0.3 2 0.5 1 0.4 1 0.5 3 0.6 4 0.2 6 0.3 4 0.3 3
S²Matt2.62.52.82.60.1 2 0.1 2 0.1 2 0.1 1 0.1 3 0.2 3 0.1 6 0.2 7 0.1 2 0.1 1 0.1 1 0.3 2 0.7 2 0.7 2 1.3 2 0.3 1 0.3 1 0.5 3 0.4 4 0.5 4 0.6 6 0.2 3 0.3 2 0.3 1
SIM5.3744.80.2 6 0.2 7 0.2 4 0.1 16 0.1 8 0.3 18 0.2 9 0.1 3 0.2 3 0.2 7 0.1 4 0.3 3 1 6 1 3 1.4 3 0.5 6 0.5 4 0.7 4 0.4 2 0.5 2 0.5 1 0.2 4 0.2 1 0.3 2
TIMI-Net5.46.45.84.10.2 7 0.2 6 0.2 5 0.1 13 0.1 11 0.1 2 0.1 5 0.1 4 0.2 4 0.2 10 0.1 5 0.3 5 1.1 8 1 5 1.4 5 0.3 3 0.4 3 0.5 2 0.4 3 0.5 1 0.6 5 0.2 2 0.4 11 0.3 5
HDMatt7.88.96.18.50.2 16 0.2 5 0.2 23 0.1 10 0.1 10 0.3 17 0.1 1 0.1 1 0.2 5 0.2 12 0.2 8 0.3 1 1.1 11 1.2 7 1.6 6 0.6 7 0.6 6 0.9 6 0.5 5 0.5 5 0.6 2 0.3 9 0.4 7 0.4 8
IamAlpha8.68.48.68.80.2 17 0.2 14 0.2 29 0.1 2 0.1 1 0.2 4 0.2 12 0.2 8 0.2 12 0.2 8 0.3 16 0.3 7 0.9 3 1 4 1.4 4 0.7 12 1 15 1 7 0.6 6 0.6 6 0.6 3 0.3 7 0.3 5 0.3 4
Background Matting10.76.9916.10.2 8 0.2 12 0.2 13 0.1 8 0.2 18 0.3 23 0.1 3 0.2 9 0.2 8 0.2 9 0.2 6 0.5 33 0.9 5 1.1 6 1.7 7 0.6 9 0.8 9 1.2 14 0.6 8 0.7 9 0.8 15 0.2 5 0.3 3 0.4 16
A2U Matting10.910.17.415.10.2 15 0.2 11 0.2 36 0.1 7 0.1 5 0.2 10 0.1 8 0.2 6 0.2 7 0.2 11 0.2 7 0.4 10 1.1 9 1.3 9 1.9 9 0.6 11 0.7 8 1.7 28 0.6 9 0.6 7 0.6 9 0.3 11 0.3 6 0.4 12
PIIAMatting11.46.912.315.10.1 4 0.2 13 0.2 8 0.1 6 0.1 4 0.2 9 0.1 4 0.2 14 0.2 15 0.1 4 0.4 22 0.6 48 0.9 4 1.5 13 1.9 12 0.4 5 0.7 7 1.2 15 1.4 27 0.7 10 0.6 7 0.2 1 0.4 15 0.3 7
AdaMatting12.18.39.918.30.2 12 0.2 15 0.2 32 0.1 4 0.1 6 0.4 43 0.2 15 0.2 12 0.2 11 0.1 3 0.1 3 0.3 8 1.1 7 1.4 10 2.3 20 0.4 4 0.6 5 0.9 5 0.9 13 1 14 0.9 17 0.3 8 0.4 14 0.4 10
GCA Matting12.512.81113.80.1 5 0.1 3 0.2 11 0.1 15 0.1 13 0.3 19 0.2 14 0.2 16 0.2 16 0.2 16 0.2 10 0.3 6 1.3 17 1.6 18 1.9 10 0.7 13 0.8 10 1.4 21 0.6 7 0.7 8 0.6 8 0.4 15 0.4 10 0.4 19
Context-aware Matting13.815.314.611.50.2 9 0.2 10 0.2 3 0.1 11 0.2 15 0.2 8 0.2 17 0.2 17 0.2 9 0.2 19 0.4 19 0.4 20 1.4 22 1.5 11 1.8 8 0.8 15 1.3 19 1 8 1.1 17 1.1 18 0.9 25 0.4 12 0.4 8 0.4 11
SampleNet Matting13.99.611.620.50.1 3 0.1 4 0.2 31 0.1 5 0.1 14 0.2 7 0.2 19 0.3 18 0.3 18 0.1 6 0.2 9 0.5 25 1.1 12 1.5 12 2.7 32 0.6 8 0.9 11 1 9 0.8 11 0.9 12 0.9 29 0.4 13 0.4 13 0.4 13
IndexNet Matting17.716.616.420.10.2 11 0.2 9 0.2 12 0.1 12 0.1 9 0.3 13 0.2 10 0.2 15 0.2 6 0.2 13 0.2 11 0.4 12 1.7 31 1.9 29 2.5 25 1 19 1.1 17 1.3 18 1.1 19 1.2 22 1.2 51 0.4 18 0.5 19 0.5 24
FE2E High-Quality Matting1817.516.819.90.2 36 0.2 21 0.2 34 0.2 23 0.2 23 0.3 29 0.2 11 0.2 13 0.2 10 0.2 14 0.3 14 0.3 9 1.3 18 1.8 27 2.8 38 0.6 10 0.9 12 1.2 11 0.9 14 1 15 0.9 22 0.4 14 0.4 9 0.3 6
ATNet Matting18.420.316.418.60.2 25 0.2 19 0.2 6 0.1 9 0.1 7 0.1 1 0.2 16 0.2 11 0.2 17 0.4 30 0.4 20 0.5 30 1.1 14 1.3 8 2.2 16 0.9 17 1.1 16 1.2 13 1.5 41 1.4 38 1.2 57 0.3 10 0.4 12 0.4 9
VDRN Matting18.721.116.318.80.2 14 0.2 8 0.2 7 0.1 14 0.1 12 0.3 25 0.2 13 0.2 10 0.2 14 0.4 32 0.3 17 0.5 22 1.4 24 1.6 17 1.9 11 0.8 16 0.9 14 1.1 10 0.9 12 0.9 13 0.7 10 0.7 44 0.7 39 0.7 51
AlphaGAN22.922.120.825.80.2 27 0.2 17 0.2 27 0.2 19 0.2 16 0.3 14 0.2 18 0.3 19 0.3 19 0.2 15 0.2 12 0.4 16 1.8 34 2.4 41 2.7 36 1.1 25 1.4 23 1.5 24 0.9 15 1.1 16 1 32 0.5 24 0.5 22 0.6 38
Deep Matting2320.119.529.40.4 58 0.4 55 0.5 58 0.2 17 0.2 26 0.2 6 0.1 7 0.1 5 0.2 13 0.2 18 0.2 13 0.6 47 1.3 20 1.5 16 2.4 23 0.8 14 0.9 13 1.3 20 0.7 10 0.8 11 1.1 43 0.4 17 0.5 17 0.5 25
DCNN Matting24.327.924.420.60.2 21 0.2 18 0.2 15 0.2 33 0.3 34 0.3 16 0.3 21 0.4 25 0.3 20 0.3 24 0.4 18 0.4 11 1.5 26 1.5 15 2.1 13 1.1 23 1.3 21 1.5 22 1.5 43 1.4 37 1 33 0.6 32 0.6 27 0.5 35
Information-flow matting25.92924.624.10.2 18 0.2 16 0.2 24 0.2 37 0.2 27 0.4 45 0.4 35 0.4 31 0.4 30 0.3 25 0.4 21 0.4 19 1.7 33 1.8 25 2.2 14 0.9 18 1.3 20 1.3 17 1.5 39 1.4 31 0.8 12 0.5 27 0.6 26 0.5 32
Three-layer graph matting27.824.125.933.50.2 10 0.2 20 0.2 28 0.2 27 0.2 21 0.4 48 0.3 20 0.4 21 0.3 21 0.1 5 0.3 15 0.5 29 1.6 28 1.7 20 2.7 34 1.1 26 1.9 33 2.4 45 1.6 54 1.6 54 1 42 0.5 23 0.6 23 0.4 21
Patch-based Matting28.825.828.931.90.2 33 0.2 26 0.2 19 0.2 21 0.3 43 0.3 38 0.4 23 0.4 27 0.4 29 0.3 23 0.5 28 0.6 44 1.2 15 1.5 14 2.2 15 1.3 31 2.1 35 1.9 35 1.2 20 1.2 21 0.9 31 0.6 40 0.6 37 0.6 44
Graph-based sparse matting28.926.828.331.80.2 34 0.3 29 0.2 14 0.2 25 0.2 22 0.4 47 0.4 29 0.4 26 0.4 31 0.2 17 0.5 23 0.4 18 1.9 39 1.9 30 2.8 39 1.1 24 1.8 29 1.8 31 1.4 30 1.5 46 1.2 48 0.4 16 0.5 21 0.5 26
KL-Divergence Based Sparse Sampling2927.428.930.80.2 19 0.2 22 0.2 16 0.2 22 0.2 25 0.3 40 0.4 25 0.4 24 0.4 24 0.3 21 0.6 32 0.4 13 1.7 32 1.9 28 2.9 43 1.7 41 2.3 39 2.3 43 1.4 28 1.3 27 1 36 0.6 31 0.6 34 0.5 31
LNSP Matting29.527.130.331.30.2 20 0.3 31 0.2 9 0.2 18 0.2 17 0.3 36 0.4 24 0.5 39 0.4 27 0.3 20 0.5 25 0.6 42 1.8 36 1.9 31 2.7 37 1.2 27 1.6 27 2 39 1.4 37 1.3 28 0.9 24 0.6 35 0.8 44 0.6 36
Comprehensive sampling3030.331.328.60.2 24 0.2 25 0.2 21 0.2 39 0.3 42 0.4 46 0.4 28 0.4 23 0.4 28 0.3 27 0.5 26 0.4 17 1.1 13 1.7 21 2.3 18 1.5 38 2.4 40 1.9 34 1.3 24 1.3 30 0.9 19 0.7 49 0.7 43 0.7 46
Three Stages Matting32.233.632.830.10.3 48 0.2 28 0.2 22 0.2 20 0.3 29 0.3 20 0.4 33 0.5 37 0.4 37 0.4 40 0.6 30 0.6 40 1.8 35 3.2 53 3 47 1 21 1.2 18 1.2 12 1.4 34 1.4 35 0.9 30 0.6 38 0.6 32 0.5 33
ATPM Matting32.233.536.926.30.2 32 0.3 38 0.2 17 0.2 32 0.2 19 0.3 41 0.4 31 0.5 40 0.4 26 0.4 31 0.7 40 0.4 21 2.1 43 2.3 40 2.6 30 1.2 28 1.8 30 1.5 23 1.4 26 1.4 36 0.8 13 0.7 45 0.9 52 0.6 39
Sparse coded matting32.734.532.930.60.3 50 0.4 47 0.3 51 0.3 44 0.3 38 0.3 35 0.4 44 0.5 33 0.4 42 0.3 28 0.5 24 0.4 14 1.4 23 1.7 24 2.3 21 1.1 22 1.6 24 1.3 19 1.5 44 1.6 53 1.1 46 0.5 21 0.5 20 0.4 17
Segmentation-based matting33.237.632.429.50.2 28 0.3 30 0.2 25 0.2 30 0.2 20 0.3 12 0.4 37 0.5 46 0.4 35 0.4 34 0.6 29 0.5 27 2.1 45 1.7 23 2.5 28 1.9 44 2.2 37 2.5 46 2 61 1.7 56 1.2 49 0.5 22 0.5 18 0.4 14
SVR Matting33.235.935.528.10.3 51 0.4 54 0.3 42 0.3 50 0.3 37 0.3 30 0.4 32 0.5 38 0.4 25 0.4 33 0.6 36 0.5 26 1.5 25 2.1 35 2.5 26 1.2 29 1.6 26 1.5 25 1.3 21 1.2 20 0.8 14 0.7 46 0.7 38 0.6 37
CCM33.336.534.428.90.2 26 0.3 33 0.2 20 0.2 34 0.3 33 0.3 28 0.4 41 0.5 41 0.4 40 0.4 44 0.6 31 0.5 24 2.1 44 2.3 39 2.5 27 1.3 30 1.7 28 1.6 26 1.3 23 1.3 25 0.8 16 0.7 50 0.8 45 0.7 50
Global Sampling Matting33.633.436.930.50.2 13 0.3 39 0.2 18 0.2 28 0.3 30 0.3 24 0.4 34 0.5 42 0.4 33 0.4 39 0.8 43 0.6 43 2.1 46 2.1 37 2.7 33 2 46 2.8 48 2.6 47 1.4 32 1.3 26 0.9 23 0.5 29 0.6 30 0.5 23
Improved color matting3436.436.629.10.2 29 0.3 32 0.2 30 0.2 36 0.3 36 0.3 15 0.4 36 0.5 45 0.4 39 0.5 47 0.7 42 0.5 37 2.5 50 2.5 46 2.7 35 1.9 43 2.5 43 2.4 44 1.4 31 1.4 33 0.9 18 0.4 19 0.4 16 0.4 15
Shared Matting34.334.336.931.80.2 22 0.3 34 0.2 26 0.3 54 0.6 54 0.5 55 0.4 27 0.4 32 0.4 32 0.4 36 0.8 44 0.5 23 1.6 30 2 34 2.3 19 1.4 32 1.9 31 1.8 30 1.5 40 1.5 42 1.1 47 0.6 33 0.6 24 0.4 22
Comprehensive Weighted Color and Texture35.234.139.5320.4 56 0.4 56 0.5 57 0.4 56 0.5 50 0.5 50 0.3 22 0.4 20 0.4 22 0.3 26 0.6 33 0.4 15 1.1 10 1.8 26 2.4 22 1 20 1.4 22 1.2 16 1.7 58 1.8 58 1.2 54 0.5 25 0.9 51 0.4 20
CSC Matting35.738.827.141.10.3 41 0.2 24 0.3 48 0.3 43 0.3 31 0.6 56 0.5 48 0.4 30 0.5 49 0.5 49 0.6 34 0.7 53 1.6 29 1.7 19 2.6 29 1.5 34 1.6 25 2 38 1.4 38 1.3 29 0.9 27 0.5 28 0.6 25 0.5 29
TSPS-RV Matting36.341.129.937.80.2 23 0.2 27 0.2 10 0.2 40 0.2 24 0.3 34 0.5 47 0.4 28 0.4 46 0.3 22 0.5 27 0.7 52 2.9 56 2.2 38 2.9 41 2.4 50 2.2 38 2.9 52 1.6 55 1.2 24 1 39 0.6 36 0.6 33 0.5 28
Global Sampling Matting (filter version)39.436.940.540.80.2 30 0.4 53 0.3 43 0.3 52 0.4 46 0.4 49 0.5 53 0.5 48 0.5 54 0.6 54 0.8 46 0.7 54 1.3 19 1.7 22 2.2 17 2 45 2.7 46 2.2 41 1.3 22 1.2 23 1.2 50 0.4 20 0.7 40 0.4 18
LocalSamplingAndKnnClassification39.640.840.437.80.2 39 0.3 37 0.2 35 0.2 24 0.3 28 0.3 22 0.4 26 0.4 29 0.4 23 0.4 41 0.7 39 0.5 38 2.9 55 3.1 52 3.9 55 2.5 51 3.2 53 2.9 51 1.6 48 1.5 43 1 37 0.7 42 0.7 42 0.6 41
LNCLM matting40.642.541.937.50.2 31 0.2 23 0.3 39 0.3 49 0.4 45 0.3 33 0.5 55 0.6 57 0.5 52 0.5 46 0.7 38 0.6 39 2.1 47 2.6 48 2.9 40 1.5 36 2.4 41 2 36 1.6 46 1.6 48 0.9 21 0.6 30 0.6 35 0.6 40
Weighted Color and Texture Matting41.339.941.1430.2 38 0.3 40 0.2 33 0.3 51 0.4 47 0.5 52 0.4 30 0.4 22 0.4 34 0.5 48 1.1 52 0.7 55 1.9 40 2.4 42 3.3 51 1.5 37 2 34 1.9 33 1.4 36 1.4 39 1.1 44 0.6 39 0.9 53 0.6 42
SPS matting41.540.444.839.50.2 35 0.3 45 0.3 38 0.4 57 0.7 57 0.5 51 0.5 49 0.5 50 0.5 53 0.6 56 1.4 57 0.7 50 1.3 21 2 33 2.5 24 2.1 48 2.7 47 2.1 40 1 16 1.2 19 0.8 11 0.6 41 0.8 50 0.7 49
Iterative Transductive Matting42.343.941.841.30.3 44 0.4 48 0.3 40 0.2 41 0.6 53 0.5 54 0.5 57 0.5 34 0.4 47 0.3 29 1.1 51 0.5 36 2 42 2.1 36 3 46 1.8 42 2.5 44 2.3 42 1.6 53 1.4 32 1 35 0.7 43 0.6 36 0.5 30
Improving Sampling Criterion43.4444442.30.3 43 0.4 46 0.3 46 0.3 53 0.4 48 0.4 42 0.5 52 0.5 53 0.5 55 0.9 60 1.4 58 0.9 58 2.2 48 2.7 49 2.9 42 2.6 52 3.2 52 2.6 48 1.1 18 1.1 17 0.9 20 0.5 26 0.6 29 0.5 27
SRLO Matting43.543.846.440.30.3 54 0.4 50 0.3 53 0.3 55 0.6 55 0.6 57 0.5 51 0.5 35 0.4 36 0.4 43 1.2 53 0.5 28 1.2 16 1.9 32 2.6 31 1.4 33 2.5 45 1.8 29 1.6 50 1.9 60 1 40 0.7 48 0.7 41 0.7 48
Learning Based Matting44.242.546.143.90.3 47 0.3 42 0.3 49 0.2 31 0.3 32 0.3 21 0.4 43 0.5 51 0.4 45 0.4 37 0.6 35 0.5 35 1.9 38 2.5 45 3.2 50 3.1 59 3.6 58 3.9 59 1.4 29 1.6 50 1 34 0.9 56 1.1 56 1.2 58
LMSPIR44.543.345.1450.3 53 0.4 51 0.3 52 0.3 48 0.7 56 0.5 53 0.4 46 0.5 36 0.4 44 0.4 35 1.2 54 0.5 32 1.5 27 2.5 44 3.2 49 1.6 39 2.4 42 1.9 32 1.6 51 1.6 47 1.2 53 0.7 47 0.6 31 0.6 45
Closed-Form Matting4545.145.844.30.3 42 0.3 41 0.3 45 0.2 26 0.3 35 0.3 27 0.4 39 0.5 49 0.4 41 0.4 42 0.6 37 0.6 41 3.3 58 3.6 57 4.6 57 2.9 58 3.5 56 3.7 58 1.5 45 1.5 44 0.9 28 0.7 51 0.8 47 1.2 57
Local Spline Regression (LSR)45.246.446.1430.2 37 0.3 35 0.3 37 0.2 29 0.3 40 0.3 32 0.4 42 0.5 43 0.4 38 0.4 38 0.7 41 0.5 34 3.4 59 3.5 56 4.5 56 2.9 55 3 50 3.2 53 1.6 56 1.7 55 1 41 0.8 55 0.8 49 0.9 53
KNN Matting45.348.545.641.90.3 49 0.3 43 0.3 41 0.3 45 0.3 39 0.3 37 0.6 60 0.6 56 0.6 60 0.5 51 1 48 0.6 45 2.8 53 2.8 50 3 45 1.5 35 1.9 32 1.6 27 1.5 42 1.5 40 0.9 26 0.8 53 1.2 57 0.9 54
Robust Matting46.34346.649.30.3 45 0.4 49 0.3 50 0.5 58 0.9 58 0.6 58 0.4 40 0.5 44 0.5 50 0.5 50 0.8 45 0.7 49 1.8 37 2.6 47 3.1 48 2 47 3.1 51 2.7 49 1.4 33 1.6 51 1.2 56 0.6 34 0.6 28 0.5 34
Large Kernel Matting47.247.548.345.80.3 46 0.3 44 0.3 47 0.2 35 0.3 41 0.2 11 0.5 50 0.6 55 0.5 51 0.5 52 1.3 55 0.7 51 2.9 54 3.3 55 3.7 52 2.6 54 3.3 54 3.4 57 1.4 35 1.4 34 1.1 45 0.8 54 0.8 48 0.8 52
High-res matting47.845.551.846.30.2 40 0.3 36 0.3 44 0.2 42 0.5 51 0.4 44 0.4 38 0.5 47 0.4 43 0.4 45 1.3 56 0.5 31 2.3 49 2.9 51 3.7 54 2.6 53 3.8 59 3.3 56 1.8 60 1.8 59 1.2 55 0.6 37 1.1 55 0.6 43
Shared Matting (Real Time)49.549.949.149.40.3 55 0.5 58 0.4 56 0.6 59 0.9 59 0.7 59 0.4 45 0.5 52 0.4 48 0.6 55 1.1 50 0.6 46 2 41 2.5 43 2.9 44 1.7 40 2.1 36 2 37 1.6 52 1.6 49 1.3 58 0.8 52 0.8 46 0.7 47
Cell-based matting Laplacian525352.1510.3 52 0.4 52 0.3 54 0.3 47 0.6 52 0.3 39 0.6 58 0.6 58 0.6 58 0.6 53 0.9 47 0.7 56 2.7 52 3.2 54 3.7 53 2.9 56 3.4 55 3.2 55 1.6 49 1.5 45 1 38 0.9 57 1 54 0.9 55
Transfusive Weights55.153.356.555.60.5 59 0.5 60 0.5 59 0.2 38 0.4 44 0.3 26 0.5 56 0.6 59 0.6 59 0.9 59 1.5 61 1 59 4.9 64 5.8 62 7 64 4.5 64 5.6 64 5.3 64