Alpha Matting Evaluation Website
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Image matting evaluation results      Competition:   Low resolution  High resolution  
Error type:  SAD   MSE   Gradient   Connectivity  
Sum of Absolute Differences 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
TIMI-Net3.64.542.38.3 4 8.7 3 9 2 4.4 6 4.7 5 4.4 2 2.8 5 2.9 3 2 2 1 9 1.1 5 1.3 2 4.7 4 5.2 5 6.2 4 1.8 3 1.9 3 2.3 2 15.9 2 16.2 1 15.5 1 16.6 3 19.2 7 18 3
LFPNet3.63.12.84.97.6 1 8.1 1 9 3 4.3 3 4.3 1 5.1 3 3 10 3 6 2.8 7 0.8 2 0.8 2 1.5 7 3.9 1 4.2 1 5.3 1 1.7 1 1.7 1 2.2 1 17 6 18 9 17.9 16 16.6 1 16.6 1 17.6 1
S²Matt43.62.95.48.3 2 8.9 4 9.4 7 4.3 4 4.3 2 5.1 4 3 9 3.1 7 2.8 8 0.8 1 0.8 1 1.5 6 3.9 2 4.4 2 5.6 2 1.7 2 1.8 2 2.3 3 16.5 5 16.8 3 16.9 9 17.7 4 17.7 2 18.1 4
SIM4.653.858.3 3 8.7 2 9 1 4.8 14 4.8 10 6 13 2.2 1 2.2 1 2 1 0.9 7 0.9 4 1.1 1 4.7 5 5.1 3 6.3 5 2.2 4 2.3 4 2.5 4 15.9 1 16.3 2 16.3 6 17.8 5 18 4 20.9 9
PIIAMatting7.9510.18.59.1 8 10 11 9.3 5 4.3 2 4.6 4 5.4 7 2.8 4 3.7 15 2.7 5 0.9 4 2.3 20 2 15 4.7 6 6.8 11 8.3 10 2.2 6 2.7 7 4.3 16 17.2 8 17.3 7 15.5 2 16.6 2 19.1 6 20.2 8
IamAlpha7.96.97.19.810.4 17 10.5 13 10.8 14 4.4 5 4.4 3 6.1 14 2.7 2 3 5 3.2 14 0.9 5 1.7 14 1.7 9 4.8 7 5.2 4 6.2 3 2.5 10 3.3 11 3.3 7 16.2 3 16.9 4 17.9 15 17.8 6 18 3 18 2
HDMatt9.511.68.18.89.5 11 10 9 10.7 13 4.7 9 4.8 8 5.8 11 2.9 8 3 4 2.6 3 1.1 14 1.2 11 1.3 3 5.2 11 5.9 6 6.7 6 2.4 7 2.6 5 3.1 5 17.3 10 17.3 5 17 11 21.5 23 22.4 17 23.2 18
Background Matting11.89.31016.39.3 9 10 10 10.1 10 4.5 8 5.1 13 6.7 19 2.9 7 3.3 9 2.9 10 1 12 1.2 10 2.2 21 5.2 10 6 7 7.8 8 2.8 14 3.4 13 4.3 15 16.4 4 17.3 6 16.4 7 19.5 10 20.9 12 27.9 40
A2U Matting11.911.38.815.69.3 10 9.7 7 10.9 16 4.8 12 4.9 11 5.3 6 3 11 3.1 8 2.8 6 1 10 1.1 6 1.4 5 5.1 8 6.7 8 8.5 11 2.5 11 3 8 5.9 27 17.3 11 18.4 12 18.1 17 20.6 17 20.6 10 27.3 37
AdaMatting11.910.610.914.310.2 15 11.1 17 10.8 15 4.9 16 5.4 15 6.6 18 3.6 17 3.4 11 3.4 20 0.9 3 0.9 3 1.8 10 4.7 3 6.8 9 9.3 19 2.2 5 2.6 6 3.3 6 19.2 19 19.8 21 18.7 21 17.8 7 19.1 5 18.6 5
SampleNet Matting12.39.912.114.89.1 7 9.7 8 9.8 9 4.3 1 4.8 7 5.1 5 3.4 16 3.7 16 3.2 17 0.9 6 1.1 8 2 13 5.1 9 6.8 10 9.7 22 2.5 9 4 17 3.7 9 18.6 18 19.3 18 19.1 24 20 13 21.6 13 23.2 19
GCA Matting13.514.810.815.18.8 5 9.5 6 11.1 18 4.9 15 4.8 9 5.8 12 3.4 15 3.7 13 3.2 16 1.1 17 1.2 9 1.3 4 5.7 18 6.9 12 7.6 7 2.8 13 3.1 9 4.5 19 18.3 15 19.2 14 18.5 19 20.8 20 21.7 14 24.7 26
FE2E High-Quality Matting14.213.115.613.910.1 14 11.1 15 9.3 6 5.5 21 6.4 19 6.9 21 3.4 14 3.7 14 3.2 15 1 11 1.7 15 1.9 11 5.7 17 7.8 21 11 27 2.5 8 3.8 15 3.8 10 17.3 9 18.4 11 17.4 14 19.6 11 21.8 15 20.2 7
VDRN Matting14.616.81512.18.9 6 9.4 5 9.3 4 5.2 18 5.6 17 6.6 17 2.8 6 3.3 10 2.7 4 1.8 30 1.9 18 2 12 5.7 16 7.1 15 8.3 9 3 16 3.5 14 3.6 8 17.6 12 18.3 10 16.9 10 23.2 30 25.9 31 26.5 33
ATNet Matting14.816.513.514.49.7 13 10.2 12 9.6 8 4.5 7 4.8 6 4.4 1 3.7 18 3.9 17 3.4 21 1.7 27 1.9 17 2.2 19 5.9 23 7 14 9.3 18 2.9 15 3.3 12 3.9 12 19.8 21 20.6 22 20.7 30 19 8 19.2 8 20.1 6
Deep Matting15.216.614.314.810.7 19 11.2 19 11 17 4.8 13 5.8 18 5.6 9 2.8 3 2.9 2 2.9 9 1.1 13 1.1 7 2 14 6 28 7.1 16 8.9 14 2.7 12 3.2 10 3.9 11 19.2 20 19.6 20 18.7 20 21.8 25 23.9 22 24.1 24
Information-flow matting17.71918.615.510.3 16 11.2 18 12.5 21 5.6 25 7.3 23 7.3 24 3.8 19 4.1 19 3 12 1.4 18 2.3 19 2 17 5.9 25 7.1 17 8.6 12 3.6 20 5.7 20 4.6 20 18.3 14 19.3 17 15.8 4 20.2 15 22.2 16 22.3 14
IndexNet Matting18.821.417.617.512.6 35 13.4 21 11.4 19 4.8 11 4.9 12 5.7 10 3.3 13 4 18 3 11 1.1 15 1.5 13 1.6 8 6.4 32 7.5 20 8.9 15 3.4 17 4 16 4.1 13 18.6 17 19.1 13 18.5 18 23.4 31 25.1 28 29.3 46
DCNN Matting19.921.81819.912 29 14.1 23 14.5 27 5.3 19 6.4 20 6.8 20 3.9 21 4.5 21 3.4 19 1.6 24 2.5 21 2.2 22 6 27 6.9 13 9.1 16 4 23 6 21 5.3 22 19.9 22 19.2 16 19.1 23 19.4 9 20 9 21.2 10
AlphaGAN20.321.420.818.99.6 12 10.7 14 10.4 12 4.7 10 5.3 14 5.4 8 3.1 12 3.7 12 3.1 13 1.1 16 1.3 12 2 16 6.4 34 8.3 29 9.3 20 3.6 19 5 18 4.3 17 20.8 23 21.5 24 20.6 29 25.7 45 28.7 43 26.7 36
Context-aware Matting22.8272120.310.4 18 11.1 16 10.1 11 6.4 35 7.4 26 7.1 22 4.1 22 4.5 22 3.8 27 2.3 45 3.1 23 3 38 7.1 41 8.2 27 9.1 17 3.5 18 5.5 19 4.1 14 18.3 16 19.2 15 16.5 8 21.1 21 23.3 20 24.6 25
Three-layer graph matting2520.822.831.410.7 20 15.2 24 13.8 24 4.9 17 5.6 16 8.1 36 3.9 20 4.4 20 3.6 24 1 8 1.8 16 3 36 5.9 22 7.3 19 12.4 36 4.2 26 8 28 8.5 45 24.2 37 25.6 38 24.2 38 20.5 16 23.5 21 22.2 12
ATPM Matting27.130.629.621.114 46 17.8 31 13.4 22 5.5 20 6.4 21 7.3 25 5.4 53 6.4 48 4.3 41 1.7 28 3.3 28 2.3 25 6.8 38 8 24 8.7 13 4.2 24 7.5 25 5.5 23 17.2 7 17.6 8 15.7 3 22.6 29 37.3 52 22.8 17
Three Stages Matting28.42828.628.611.7 28 13.9 22 13.9 25 5.6 22 7.4 25 7.9 30 4.6 34 5.5 35 4.2 36 2.2 41 4 35 3.1 41 6.5 35 11 46 11.9 31 4 21 6.5 22 4.5 18 23.3 31 23.2 33 22.3 33 19.6 12 20.8 11 22.4 15
LNSP Matting29.926.430.532.812.2 30 22.5 49 19.5 54 5.6 23 8.1 29 8.8 46 4.6 32 5.9 40 3.6 23 1.5 21 3.5 31 3.1 40 6.2 29 8.1 26 10.7 26 4 22 7.1 23 6.4 29 21.5 26 20.8 23 16.3 5 22.5 28 24.4 23 27.8 39
CSC Matting29.933.426.130.313.6 43 15.6 25 14.5 26 6.2 33 7.5 27 8.1 37 4.6 35 4.8 24 4.2 39 1.8 32 2.7 22 2.5 27 5.5 15 7.3 18 9.7 21 4.6 30 7.6 26 6.9 33 23.7 33 23 31 21 31 26.3 46 27.2 36 25.2 28
Graph-based sparse matting3131.531.829.612.6 36 20.5 41 14.8 31 5.7 27 7.3 22 6.4 16 4.5 30 5.3 31 3.7 25 1.4 20 3.3 29 2.3 24 6.3 31 7.9 22 11.1 28 4.2 25 8.3 31 6.4 28 28.7 50 31.3 51 27.1 47 23.6 33 25.1 27 27.3 38
KL-Divergence Based Sparse Sampling31.229.631.332.811.6 27 17.5 30 14.7 28 5.6 24 8.5 34 8 32 4.9 46 5.3 29 3.7 26 1.5 22 3.5 30 2.1 18 5.8 20 8.3 28 14.1 44 5.6 41 9.3 36 8 41 24.6 38 27.7 45 28.9 50 20.7 19 22.7 18 23.9 23
Patch-based Matting31.225.433.534.810.9 22 19 35 15.7 37 6 30 9.5 43 8.3 39 4.3 26 5.2 28 4.2 38 1.6 23 3.2 26 2.6 28 5.2 12 9 34 12.4 33 4.7 31 9.7 38 7 34 21.6 27 21.7 25 24.9 40 23.5 32 28.1 39 25.6 29
TSPS-RV Matting32.630.832.534.511.3 26 16.4 28 13.7 23 6.1 31 8.1 31 8.6 43 4.5 28 5.4 33 4.1 35 1.4 19 3.3 27 3.5 50 7.9 49 8.9 32 12.4 35 6.2 45 9 34 8.7 47 22.8 30 23.5 34 21.4 32 20.7 18 28.5 41 22.2 11
Iterative Transductive Matting33.334.333.53213.1 40 17.2 29 15.6 36 5.7 26 8.6 36 7.8 29 5.1 49 5.5 34 3.9 28 1.9 33 5.8 46 2.6 29 6.6 36 8.5 30 13.8 43 5.4 36 10 39 7.4 38 25.5 40 24 35 23.8 37 20.1 14 22.7 19 22.7 16
SVR Matting33.736.634.330.118.7 58 30.7 60 19.1 51 6.8 45 7.7 28 7.6 28 4.7 41 5 27 3.4 18 1.9 34 4.7 38 2.9 34 5.8 19 8.7 31 10.5 23 4.3 27 8 29 5.6 25 21.2 25 22.1 28 17.1 13 25.6 44 26.1 33 30.6 49
Comprehensive sampling33.830.434.336.611.2 25 18.5 34 14.8 29 6.5 39 9.5 42 8.9 48 4.5 29 4.9 25 4.1 34 1.7 26 3.1 25 2.3 26 5.4 14 9.8 38 13.4 41 5.5 39 11.5 45 7.4 40 23.9 35 22 27 22.8 34 23.8 36 28 38 28.1 41
Comprehensive Weighted Color and Texture34.333.635.633.514.6 47 16 26 15.7 38 6.8 44 10 46 7.9 31 4.3 25 5 26 4.1 32 1.7 25 3.5 32 2.2 20 5.4 13 9.9 40 12.8 39 4.3 28 7.4 24 5.2 21 28.3 49 28.1 46 25.4 43 24 38 30.2 45 28.7 44
Sparse coded matting34.73835.630.513.7 44 25.8 56 14.8 32 6.4 36 8.2 32 6.2 15 4.7 36 5.4 32 4 30 1.8 31 3.1 24 2.3 23 5.9 24 8 25 10.6 24 4.5 29 8 27 5.5 24 30.3 52 33.1 54 29.2 51 27.7 52 27.2 35 29 45
LocalSamplingAndKnnClassification36.338.934.435.612.6 34 16 27 12.4 20 5.8 28 8.1 30 8 33 4.5 31 5.5 36 4.1 31 2.2 42 5.1 41 3.4 48 8.1 50 10.5 42 15.6 49 7.3 49 12.3 48 9.4 48 24.1 36 21.8 26 19.7 25 24.7 41 24.8 25 25.9 31
Weighted Color and Texture Matting3734.539.337.313.1 41 17.8 32 15.8 39 6.5 38 9.4 40 8.6 42 4.2 24 4.7 23 3.9 29 1.7 29 6 47 2.7 30 6.4 33 11 45 16.3 50 4.8 32 9.1 35 6.5 30 23.7 32 24.8 37 23.2 35 26.5 47 40.2 55 28.5 43
CCM37.340.437.334.313.8 45 20.8 42 16.9 47 6.4 37 8.9 38 8.2 38 4.7 37 5.9 41 3.6 22 2.5 47 4.3 36 3 35 7 40 9 33 10.6 25 4.9 33 8.1 30 5.7 26 25.6 41 27.5 44 24.5 39 25.4 43 26.4 34 28.2 42
LNCLM matting37.439.937.33510.9 23 11.2 20 16.7 45 6.9 47 8.9 39 7.2 23 5.6 55 7 56 4.1 33 2.5 49 5.1 42 3.5 51 7.5 44 10 41 12 32 5.5 40 11.3 42 7.3 37 25.2 39 23 32 19.9 27 21.2 22 25 26 26.4 32
Shared Matting37.435.641.135.510.8 21 20.5 40 15 33 7.8 51 11.6 52 8.1 34 4.2 23 5.3 30 4.2 37 2.1 36 5.8 45 2.9 33 5.9 26 9.2 35 11.4 30 5 34 8.8 32 6.8 32 34.9 57 34.9 55 34.3 55 23.9 37 28.4 40 25.7 30
Global Sampling Matting39.836.542.640.410.9 24 22.7 50 15.4 34 6.3 34 9.5 44 9 49 4.7 38 6.4 50 4.3 43 2.2 43 5.6 44 3.4 47 6.9 39 9.6 37 12.9 40 6.3 46 12.5 49 8.6 46 25.8 42 27.5 43 25.3 42 22 26 24.4 24 23.7 22
SRLO Matting40.839.443.439.614.7 48 18 33 17.7 49 6.9 46 10.7 48 8.9 47 4.9 47 5.7 38 4.7 51 2.1 38 6.5 48 2.8 32 6.3 30 10.9 44 15.2 48 5.4 35 11.6 46 7 36 26.5 47 29.7 48 25.1 41 21.7 24 28.5 42 22.3 13
Segmentation-based matting41.141.940.341.112.8 39 23.5 52 16.6 44 6.6 40 8.3 33 7.3 26 4.8 45 6.1 44 4.3 44 2.1 37 3.9 34 3.1 39 6.7 37 8 23 13.4 42 6 44 8.8 33 8.2 42 31.6 53 35.6 56 38.8 57 24.5 40 32 47 26.7 35
Improved color matting42.342.541.642.614.9 49 24.5 54 20 55 6.7 42 9.5 41 8.5 41 4.6 33 6.1 45 4.3 45 2.6 51 5.4 43 3.4 49 7.5 45 9.9 39 12.5 37 6 42 10.1 40 8.4 44 26.1 43 26.7 42 23.6 36 23.8 35 25.6 29 26.7 34
KNN Matting42.644.644.438.916.2 53 19.7 36 16.8 46 8 52 11 49 9 51 4.7 39 6.7 53 4.3 40 3 54 7.7 54 3.7 52 9.2 53 11.3 47 11.3 29 6 43 10.4 41 6.7 31 18.1 13 19.6 19 17 12 27.4 50 41 56 32.7 50
Local Spline Regression (LSR)42.744.939.443.912.2 31 20 38 16.2 40 6.1 32 8.8 37 8.1 35 5.2 51 6.2 47 4.6 48 2.2 44 4.9 40 3.1 42 9.4 55 11.9 49 18.3 53 8.2 52 11.4 43 10.1 50 26.4 45 22.5 29 20.2 28 27 49 26 32 39.8 55
Global Sampling Matting (filter version)42.940.645.642.412.3 32 24.3 53 16.3 41 7.3 49 10.2 47 9.5 52 5.1 50 6.4 49 4.7 52 2.4 46 4.7 39 3.2 44 5.9 21 9.5 36 12.4 34 6.5 47 13.1 50 8.3 43 26.5 46 28.3 47 30 53 23.6 34 29.1 44 23.5 20
Learning Based Matting44.144.643.344.416 52 22 48 18.7 50 6.6 41 7.4 24 7.4 27 4.8 43 6.1 43 4.3 46 2.1 35 3.7 33 2.8 31 7.5 46 14.5 55 19.5 56 8.6 56 14.1 53 14.6 58 22.5 28 24.8 36 19.9 26 34.6 56 38.5 54 51.2 61
LMSPIR45.144.146.944.415.2 51 20 37 19.1 52 6.7 43 11.2 50 8.7 45 4.8 44 5.8 39 4.6 50 2.1 39 6.8 51 3 37 7.9 48 14.3 54 20.2 57 5.5 38 11.4 44 7 35 29.7 51 31 50 29.6 52 24 39 34.2 50 25 27
Shared Matting (Real Time)45.644.346.54612.4 33 21.6 44 16.3 42 9.5 55 13.5 54 9.9 53 4.4 27 5.6 37 4.4 47 2.5 50 6.8 52 3.2 45 7.1 42 10.8 43 12.6 38 5.4 37 9.7 37 7.4 39 35.5 59 35.8 57 35.5 56 27.6 51 33.4 48 29.8 48
Closed-Form Matting4644.643.649.912.7 37 21.9 47 17.2 48 5.9 29 8.5 35 8.6 44 4.7 40 6 42 4.3 42 2.2 40 4.6 37 3.3 46 9.3 54 12.1 50 19.3 55 8.3 53 14.9 55 13.4 57 34.2 56 32.4 53 27.4 48 26.5 48 25.7 30 48.3 59
Improving Sampling Criterion49.748.951.548.812.7 38 21.1 43 16.4 43 11.5 58 17 59 12.1 58 5.8 57 8.1 59 5.7 57 5.4 62 12.1 61 6.6 61 9.6 57 15.7 56 17.8 51 10.2 58 17 56 11.2 55 23.8 34 26.7 41 25.9 44 22.2 27 27.3 37 23.7 21
Cell-based matting Laplacian50.352.44949.415.1 50 21.7 45 15.6 35 7.6 50 11.4 51 9 50 5.7 56 6.7 54 5.2 55 3.1 55 6.7 49 4.5 55 8.6 51 11.4 48 14.9 46 8.5 55 13.5 52 11.1 53 27.7 48 26.2 40 27.6 49 32.4 54 37.6 53 37.9 52
Large Kernel Matting50.552.149.949.517.2 54 21.8 46 20.7 56 7.2 48 9.6 45 8.4 40 5.3 52 6.6 52 4.6 49 2.9 53 8.2 56 4.2 53 8.6 52 12.1 51 14.7 45 8 51 13.4 51 11.2 54 33 54 31.8 52 26.1 45 32.1 53 32 46 38.4 54
Robust Matting51.247.552.15417.3 55 28.4 58 21.1 57 10.1 56 16.9 58 11.4 56 4.8 42 6.5 51 5 54 2.8 52 7.3 53 4.4 54 7.3 43 14 53 18.1 52 6.8 48 14.6 54 10.6 52 22.7 29 26.1 39 32.1 54 34.4 55 37 51 38 53
SPS matting53.352.656.350.913.4 42 23 51 14.8 30 12.5 59 18.5 60 12.4 59 6.6 61 9.4 62 6.5 62 4.5 60 12.7 62 5.4 58 9.5 56 16.4 58 18.6 54 9.8 57 18.1 59 10.6 51 26.1 44 30.9 49 26.2 46 25 42 33.5 49 29.5 47
High-res matting54.252.855.554.418.6 57 25.8 55 24.6 59 8.6 53 14.1 55 11.1 55 5 48 6.2 46 4.8 53 2.5 48 8.3 57 3.2 43 7.8 47 14 52 21.4 58 8.5 54 18.1 60 12.2 56 35.3 58 38.1 59 42.6 60 38.7 57 54.6 60 36.8 51
Transfusive Weights54.754.854.554.923.2 59 26.7 57 22.4 58 9.2 54 11.9 53 10.4 54 6.1 59 8.1 58 5.9 59 3.8 58 8 55 5.3 57 12.9 60 21.4 60 37.6 64 13.1 63 22.8 62