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
TransMatting2.82.82.82.80.1 3 0.1 1 0.1 1 0.1 1 0.1 1 0.1 4 0.1 2 0.1 1 0.1 1 0.1 2 0.1 3 0.2 2 0.8 3 0.9 3 1.3 2 0.3 3 0.4 3 0.5 2 0.6 7 0.6 7 0.6 7 0.2 1 0.2 3 0.3 3
LFPNet32.82.83.40.1 1 0.1 2 0.1 2 0.1 3 0.1 3 0.2 6 0.1 3 0.1 3 0.1 2 0.1 3 0.1 2 0.3 6 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 8 0.3 6 0.3 5
S²Matt3.433.43.80.1 2 0.1 3 0.1 3 0.1 2 0.1 4 0.2 5 0.1 7 0.2 8 0.1 3 0.1 1 0.1 1 0.3 4 0.7 2 0.7 2 1.3 3 0.3 1 0.3 1 0.5 4 0.4 4 0.5 4 0.6 6 0.2 5 0.3 4 0.3 2
IamAlpha5.26.95.33.50.1 4 0.1 4 0.1 4 0.1 5 0.1 2 0.1 1 0.2 13 0.2 9 0.2 7 0.2 9 0.2 7 0.2 1 0.9 4 1 5 1.4 6 0.6 13 0.7 9 0.9 7 0.5 5 0.5 5 0.5 1 0.2 2 0.2 1 0.2 1
SIM6.48.156.10.2 8 0.2 9 0.2 6 0.1 17 0.1 9 0.3 19 0.2 10 0.1 4 0.2 4 0.2 8 0.1 5 0.3 5 1 7 1 4 1.4 4 0.5 7 0.5 5 0.7 5 0.4 2 0.5 2 0.5 2 0.2 6 0.2 2 0.3 4
TIMI-Net6.57.56.85.10.2 9 0.2 8 0.2 7 0.1 14 0.1 12 0.1 3 0.1 6 0.1 5 0.2 5 0.2 11 0.1 6 0.3 7 1.1 9 1 6 1.4 5 0.3 4 0.4 4 0.5 3 0.4 3 0.5 1 0.6 5 0.2 4 0.4 12 0.3 6
HDMatt99.97.49.90.2 18 0.2 7 0.2 25 0.1 11 0.1 11 0.3 18 0.1 1 0.1 2 0.2 6 0.2 13 0.2 10 0.3 3 1.1 12 1.2 8 1.6 7 0.6 8 0.6 7 0.9 8 0.5 6 0.5 6 0.6 3 0.3 10 0.4 8 0.4 9
Background Matting128.110.517.40.2 10 0.2 14 0.2 15 0.1 9 0.2 19 0.3 24 0.1 4 0.2 10 0.2 10 0.2 10 0.2 8 0.5 34 0.9 6 1.1 7 1.7 8 0.6 10 0.8 11 1.2 15 0.6 9 0.7 10 0.8 16 0.2 7 0.3 5 0.4 17
A2U Matting12.111.38.816.30.2 17 0.2 13 0.2 37 0.1 8 0.1 6 0.2 11 0.1 9 0.2 7 0.2 9 0.2 12 0.2 9 0.4 11 1.1 10 1.3 10 1.9 10 0.6 12 0.7 10 1.7 29 0.6 10 0.6 8 0.6 10 0.3 12 0.3 7 0.4 13
PIIAMatting12.68.113.416.30.1 6 0.2 15 0.2 10 0.1 7 0.1 5 0.2 10 0.1 5 0.2 15 0.2 16 0.1 5 0.4 23 0.6 49 0.9 5 1.5 14 1.9 13 0.4 6 0.7 8 1.2 16 1.4 28 0.7 11 0.6 8 0.2 3 0.4 16 0.3 8
AdaMatting13.29.310.919.40.2 14 0.2 16 0.2 33 0.1 4 0.1 7 0.4 44 0.2 16 0.2 13 0.2 13 0.1 4 0.1 4 0.3 9 1.1 8 1.4 11 2.3 21 0.4 5 0.6 6 0.9 6 0.9 14 1 15 0.9 18 0.3 9 0.4 15 0.4 11
GCA Matting13.813.912.4150.1 7 0.1 5 0.2 13 0.1 16 0.1 14 0.3 20 0.2 15 0.2 17 0.2 17 0.2 17 0.2 12 0.3 8 1.3 18 1.6 19 1.9 11 0.7 14 0.8 12 1.4 22 0.6 8 0.7 9 0.6 9 0.4 16 0.4 11 0.4 20
Context-aware Matting1516.415.812.80.2 11 0.2 12 0.2 5 0.1 12 0.2 16 0.2 9 0.2 18 0.2 18 0.2 11 0.2 20 0.4 20 0.4 21 1.4 23 1.5 12 1.8 9 0.8 16 1.3 20 1 9 1.1 18 1.1 19 0.9 26 0.4 13 0.4 9 0.4 12
SampleNet Matting15.110.81321.50.1 5 0.1 6 0.2 32 0.1 6 0.1 15 0.2 8 0.2 20 0.3 19 0.3 19 0.1 7 0.2 11 0.5 26 1.1 13 1.5 13 2.7 33 0.6 9 0.9 13 1 10 0.8 12 0.9 13 0.9 30 0.4 14 0.4 14 0.4 14
IndexNet Matting18.917.817.621.40.2 13 0.2 11 0.2 14 0.1 13 0.1 10 0.3 14 0.2 11 0.2 16 0.2 8 0.2 14 0.2 13 0.4 13 1.7 32 1.9 30 2.5 26 1 20 1.1 18 1.3 19 1.1 20 1.2 23 1.2 52 0.4 19 0.5 20 0.5 25
FE2E High-Quality Matting19.218.518210.2 37 0.2 22 0.2 35 0.2 24 0.2 24 0.3 30 0.2 12 0.2 14 0.2 12 0.2 15 0.3 16 0.3 10 1.3 19 1.8 28 2.8 39 0.6 11 0.9 14 1.2 12 0.9 15 1 16 0.9 23 0.4 15 0.4 10 0.3 7
ATNet Matting19.521.317.419.80.2 26 0.2 20 0.2 8 0.1 10 0.1 8 0.1 2 0.2 17 0.2 12 0.2 18 0.4 31 0.4 21 0.5 31 1.1 15 1.3 9 2.2 17 0.9 18 1.1 17 1.2 14 1.5 42 1.4 39 1.2 58 0.3 11 0.4 13 0.4 10
VDRN Matting19.922.317.519.90.2 16 0.2 10 0.2 9 0.1 15 0.1 13 0.3 26 0.2 14 0.2 11 0.2 15 0.4 33 0.3 18 0.5 23 1.4 25 1.6 18 1.9 12 0.8 17 0.9 16 1.1 11 0.9 13 0.9 14 0.7 11 0.7 45 0.7 40 0.7 52
AlphaGAN2423.121.926.90.2 28 0.2 18 0.2 29 0.2 20 0.2 17 0.3 15 0.2 19 0.3 20 0.3 20 0.2 16 0.2 14 0.4 17 1.8 35 2.4 42 2.7 37 1.1 26 1.4 24 1.5 25 0.9 16 1.1 17 1 33 0.5 25 0.5 23 0.6 39
Deep Matting24.121.120.830.40.4 59 0.4 56 0.5 59 0.2 18 0.2 27 0.2 7 0.1 8 0.1 6 0.2 14 0.2 19 0.2 15 0.6 48 1.3 21 1.5 17 2.4 24 0.8 15 0.9 15 1.3 21 0.7 11 0.8 12 1.1 44 0.4 18 0.5 18 0.5 26
DCNN Matting25.328.925.421.80.2 22 0.2 19 0.2 17 0.2 34 0.3 35 0.3 17 0.3 22 0.4 26 0.3 21 0.3 25 0.4 19 0.4 12 1.5 27 1.5 16 2.1 14 1.1 24 1.3 22 1.5 23 1.5 44 1.4 38 1 34 0.6 33 0.6 28 0.5 36
Information-flow matting273025.625.30.2 19 0.2 17 0.2 26 0.2 38 0.2 28 0.4 46 0.4 36 0.4 32 0.4 31 0.3 26 0.4 22 0.4 20 1.7 34 1.8 26 2.2 15 0.9 19 1.3 21 1.3 18 1.5 40 1.4 32 0.8 13 0.5 28 0.6 27 0.5 33
Three-layer graph matting2925.32734.60.2 12 0.2 21 0.2 30 0.2 28 0.2 22 0.4 49 0.3 21 0.4 22 0.3 22 0.1 6 0.3 17 0.5 30 1.6 29 1.7 21 2.7 35 1.1 27 1.9 34 2.4 46 1.6 55 1.6 55 1 43 0.5 24 0.6 24 0.4 22
Patch-based Matting29.926.829.9330.2 34 0.2 27 0.2 21 0.2 22 0.3 44 0.3 39 0.4 24 0.4 28 0.4 30 0.3 24 0.5 29 0.6 45 1.2 16 1.5 15 2.2 16 1.3 32 2.1 36 1.9 36 1.2 21 1.2 22 0.9 32 0.6 41 0.6 38 0.6 45
Graph-based sparse matting3027.829.332.90.2 35 0.3 30 0.2 16 0.2 26 0.2 23 0.4 48 0.4 30 0.4 27 0.4 32 0.2 18 0.5 24 0.4 19 1.9 40 1.9 31 2.8 40 1.1 25 1.8 30 1.8 32 1.4 31 1.5 47 1.2 49 0.4 17 0.5 22 0.5 27
KL-Divergence Based Sparse Sampling3028.429.931.90.2 20 0.2 23 0.2 18 0.2 23 0.2 26 0.3 41 0.4 26 0.4 25 0.4 25 0.3 22 0.6 33 0.4 14 1.7 33 1.9 29 2.9 44 1.7 42 2.3 40 2.3 44 1.4 29 1.3 28 1 37 0.6 32 0.6 35 0.5 32
LNSP Matting30.628.131.332.40.2 21 0.3 32 0.2 11 0.2 19 0.2 18 0.3 37 0.4 25 0.5 40 0.4 28 0.3 21 0.5 26 0.6 43 1.8 37 1.9 32 2.7 38 1.2 28 1.6 28 2 40 1.4 38 1.3 29 0.9 25 0.6 36 0.8 45 0.6 37
Comprehensive sampling31.131.332.329.80.2 25 0.2 26 0.2 23 0.2 40 0.3 43 0.4 47 0.4 29 0.4 24 0.4 29 0.3 28 0.5 27 0.4 18 1.1 14 1.7 22 2.3 19 1.5 39 2.4 41 1.9 35 1.3 25 1.3 31 0.9 20 0.7 50 0.7 44 0.7 47
Three Stages Matting33.234.633.831.30.3 49 0.2 29 0.2 24 0.2 21 0.3 30 0.3 21 0.4 34 0.5 38 0.4 38 0.4 41 0.6 31 0.6 41 1.8 36 3.2 54 3 48 1 22 1.2 19 1.2 13 1.4 35 1.4 36 0.9 31 0.6 39 0.6 33 0.5 34
ATPM Matting33.334.537.927.40.2 33 0.3 39 0.2 19 0.2 33 0.2 20 0.3 42 0.4 32 0.5 41 0.4 27 0.4 32 0.7 41 0.4 22 2.1 44 2.3 41 2.6 31 1.2 29 1.8 31 1.5 24 1.4 27 1.4 37 0.8 14 0.7 46 0.9 53 0.6 40
Sparse coded matting33.735.533.931.60.3 51 0.4 48 0.3 52 0.3 45 0.3 39 0.3 36 0.4 45 0.5 34 0.4 43 0.3 29 0.5 25 0.4 15 1.4 24 1.7 25 2.3 22 1.1 23 1.6 25 1.3 20 1.5 45 1.6 54 1.1 47 0.5 22 0.5 21 0.4 18
SVR Matting34.236.936.529.10.3 52 0.4 55 0.3 43 0.3 51 0.3 38 0.3 31 0.4 33 0.5 39 0.4 26 0.4 34 0.6 37 0.5 27 1.5 26 2.1 36 2.5 27 1.2 30 1.6 27 1.5 26 1.3 22 1.2 21 0.8 15 0.7 47 0.7 39 0.6 38
Segmentation-based matting34.238.633.430.60.2 29 0.3 31 0.2 27 0.2 31 0.2 21 0.3 13 0.4 38 0.5 47 0.4 36 0.4 35 0.6 30 0.5 28 2.1 46 1.7 24 2.5 29 1.9 45 2.2 38 2.5 47 2 62 1.7 57 1.2 50 0.5 23 0.5 19 0.4 15
CCM34.337.535.4300.2 27 0.3 34 0.2 22 0.2 35 0.3 34 0.3 29 0.4 42 0.5 42 0.4 41 0.4 45 0.6 32 0.5 25 2.1 45 2.3 40 2.5 28 1.3 31 1.7 29 1.6 27 1.3 24 1.3 26 0.8 17 0.7 51 0.8 46 0.7 51
Global Sampling Matting34.734.537.931.60.2 15 0.3 40 0.2 20 0.2 29 0.3 31 0.3 25 0.4 35 0.5 43 0.4 34 0.4 40 0.8 44 0.6 44 2.1 47 2.1 38 2.7 34 2 47 2.8 49 2.6 48 1.4 33 1.3 27 0.9 24 0.5 30 0.6 31 0.5 24
Improved color matting3537.437.630.10.2 30 0.3 33 0.2 31 0.2 37 0.3 37 0.3 16 0.4 37 0.5 46 0.4 40 0.5 48 0.7 43 0.5 38 2.5 51 2.5 47 2.7 36 1.9 44 2.5 44 2.4 45 1.4 32 1.4 34 0.9 19 0.4 20 0.4 17 0.4 16
Shared Matting35.335.337.932.90.2 23 0.3 35 0.2 28 0.3 55 0.6 55 0.5 56 0.4 28 0.4 33 0.4 33 0.4 37 0.8 45 0.5 24 1.6 31 2 35 2.3 20 1.4 33 1.9 32 1.8 31 1.5 41 1.5 43 1.1 48 0.6 34 0.6 25 0.4 23
Comprehensive Weighted Color and Texture36.235.140.5330.4 57 0.4 57 0.5 58 0.4 57 0.5 51 0.5 51 0.3 23 0.4 21 0.4 23 0.3 27 0.6 34 0.4 16 1.1 11 1.8 27 2.4 23 1 21 1.4 23 1.2 17 1.7 59 1.8 59 1.2 55 0.5 26 0.9 52 0.4 21
CSC Matting36.739.828.142.10.3 42 0.2 25 0.3 49 0.3 44 0.3 32 0.6 57 0.5 49 0.4 31 0.5 50 0.5 50 0.6 35 0.7 54 1.6 30 1.7 20 2.6 30 1.5 35 1.6 26 2 39 1.4 39 1.3 30 0.9 28 0.5 29 0.6 26 0.5 30
TSPS-RV Matting37.342.130.938.90.2 24 0.2 28 0.2 12 0.2 41 0.2 25 0.3 35 0.5 48 0.4 29 0.4 47 0.3 23 0.5 28 0.7 53 2.9 57 2.2 39 2.9 42 2.4 51 2.2 39 2.9 53 1.6 56 1.2 25 1 40 0.6 37 0.6 34 0.5 29
Global Sampling Matting (filter version)40.437.941.541.80.2 31 0.4 54 0.3 44 0.3 53 0.4 47 0.4 50 0.5 54 0.5 49 0.5 55 0.6 55 0.8 47 0.7 55 1.3 20 1.7 23 2.2 18 2 46 2.7 47 2.2 42 1.3 23 1.2 24 1.2 51 0.4 21 0.7 41 0.4 19
LocalSamplingAndKnnClassification40.641.841.438.80.2 40 0.3 38 0.2 36 0.2 25 0.3 29 0.3 23 0.4 27 0.4 30 0.4 24 0.4 42 0.7 40 0.5 39 2.9 56 3.1 53 3.9 56 2.5 52 3.2 54 2.9 52 1.6 49 1.5 44 1 38 0.7 43 0.7 43 0.6 42
LNCLM matting41.643.542.938.50.2 32 0.2 24 0.3 40 0.3 50 0.4 46 0.3 34 0.5 56 0.6 58 0.5 53 0.5 47 0.7 39 0.6 40 2.1 48 2.6 49 2.9 41 1.5 37 2.4 42 2 37 1.6 47 1.6 49 0.9 22 0.6 31 0.6 36 0.6 41
Weighted Color and Texture Matting42.340.942.1440.2 39 0.3 41 0.2 34 0.3 52 0.4 48 0.5 53 0.4 31 0.4 23 0.4 35 0.5 49 1.1 53 0.7 56 1.9 41 2.4 43 3.3 52 1.5 38 2 35 1.9 34 1.4 37 1.4 40 1.1 45 0.6 40 0.9 54 0.6 43
SPS matting42.541.445.840.50.2 36 0.3 46 0.3 39 0.4 58 0.7 58 0.5 52 0.5 50 0.5 51 0.5 54 0.6 57 1.4 58 0.7 51 1.3 22 2 34 2.5 25 2.1 49 2.7 48 2.1 41 1 17 1.2 20 0.8 12 0.6 42 0.8 51 0.7 50
Iterative Transductive Matting43.344.942.842.30.3 45 0.4 49 0.3 41 0.2 42 0.6 54 0.5 55 0.5 58 0.5 35 0.4 48 0.3 30 1.1 52 0.5 37 2 43 2.1 37 3 47 1.8 43 2.5 45 2.3 43 1.6 54 1.4 33 1 36 0.7 44 0.6 37 0.5 31
Improving Sampling Criterion44.4454543.30.3 44 0.4 47 0.3 47 0.3 54 0.4 49 0.4 43 0.5 53 0.5 54 0.5 56 0.9 61 1.4 59 0.9 59 2.2 49 2.7 50 2.9 43 2.6 53 3.2 53 2.6 49 1.1 19 1.1 18 0.9 21 0.5 27 0.6 30 0.5 28
SRLO Matting44.544.847.441.30.3 55 0.4 51 0.3 54 0.3 56 0.6 56 0.6 58 0.5 52 0.5 36 0.4 37 0.4 44 1.2 54 0.5 29 1.2 17 1.9 33 2.6 32 1.4 34 2.5 46 1.8 30 1.6 51 1.9 61 1 41 0.7 49 0.7 42 0.7 49
Learning Based Matting45.243.547.144.90.3 48 0.3 43 0.3 50 0.2 32 0.3 33 0.3 22 0.4 44 0.5 52 0.4 46 0.4 38 0.6 36 0.5 36 1.9 39 2.5 46 3.2 51 3.1 60 3.6 59 3.9 60 1.4 30 1.6 51 1 35 0.9 57 1.1 57 1.2 59
LMSPIR45.544.346.1460.3 54 0.4 52 0.3 53 0.3 49 0.7 57 0.5 54 0.4 47 0.5 37 0.4 45 0.4 36 1.2 55 0.5 33 1.5 28 2.5 45 3.2 50 1.6 40 2.4 43 1.9 33 1.6 52 1.6 48 1.2 54 0.7 48 0.6 32 0.6 46
Closed-Form Matting4646.146.845.30.3 43 0.3 42 0.3 46 0.2 27 0.3 36 0.3 28 0.4 40 0.5 50 0.4 42 0.4 43 0.6 38 0.6 42 3.3 59 3.6 58 4.6 58 2.9 59 3.5 57 3.7 59 1.5 46 1.5 45 0.9 29 0.7 52 0.8 48 1.2 58
Local Spline Regression (LSR)46.247.447.1440.2 38 0.3 36 0.3 38 0.2 30 0.3 41 0.3 33 0.4 43 0.5 44 0.4 39 0.4 39 0.7 42 0.5 35 3.4 60 3.5 57 4.5 57 2.9 56 3 51 3.2 54 1.6 57 1.7 56 1 42 0.8 56 0.8 50 0.9 54
KNN Matting46.349.546.642.90.3 50 0.3 44 0.3 42 0.3 46 0.3 40 0.3 38 0.6 61 0.6 57 0.6 61 0.5 52 1 49 0.6 46 2.8 54 2.8 51 3 46 1.5 36 1.9 33 1.6 28 1.5 43 1.5 41 0.9 27 0.8 54 1.2 58 0.9 55
Robust Matting47.34447.650.30.3 46 0.4 50 0.3 51 0.5 59 0.9 59 0.6 59 0.4 41 0.5 45 0.5 51 0.5 51 0.8 46 0.7 50 1.8 38 2.6 48 3.1 49 2 48 3.1 52 2.7 50 1.4 34 1.6 52 1.2 57 0.6 35 0.6 29 0.5 35
Large Kernel Matting48.248.549.346.80.3 47 0.3 45 0.3 48 0.2 36 0.3 42 0.2 12 0.5 51 0.6 56 0.5 52 0.5 53 1.3 56 0.7 52 2.9 55 3.3 56 3.7 53 2.6 55 3.3 55 3.4 58 1.4 36 1.4 35 1.1 46 0.8 55 0.8 49 0.8 53
High-res matting48.846.552.847.30.2 41 0.3 37 0.3 45 0.2 43 0.5 52 0.4 45 0.4 39 0.5 48 0.4 44 0.4 46 1.3 57 0.5 32 2.3 50 2.9 52 3.7 55 2.6 54 3.8 60 3.3 57 1.8 61 1.8 60 1.2 56 0.6 38 1.1 56 0.6 44
Shared Matting (Real Time)50.550.950.150.40.3 56 0.5 59 0.4 57 0.6 60 0.9 60 0.7 60 0.4 46 0.5 53 0.4 49 0.6 56 1.1 51 0.6 47 2 42 2.5 44 2.9 45 1.7 41 2.1 37 2 38 1.6 53 1.6 50 1.3 59 0.8 53 0.8 47 0.7 48
Cell-based matting Laplacian535453.1520.3 53 0.4 53 0.3 55 0.3 48 0.6 53 0.3 40 0.6 59 0.6 59 0.6 59 0.6 54 0.9 48 0.7 57 2.7 53 3.2 55 3.7 54 2.9 57 3.4 56 3.2 56