Alpha Matting Evaluation Website
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Image matting evaluation results      Competition:   Low resolution  High resolution  
Error type:  SAD   MSE   Gradient   Connectivity  
Mean Squared 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
TransMatting2.11.52.32.50.2 2 0.2 1 0.2 1 0.1 1 0.1 1 0.2 4 0.1 1 0.1 2 0.1 1 0 1 0 3 0 2 0.2 1 0.3 3 0.4 2 0.1 3 0.1 3 0.1 1 0.8 1 0.8 4 0.9 8 0.5 2 0.4 1 0.4 1
LFPNet4.142.95.50.2 1 0.2 2 0.3 3 0.2 6 0.1 2 0.2 6 0.1 8 0.1 5 0.1 5 0 3 0 2 0.1 8 0.2 2 0.2 1 0.4 1 0.1 2 0.1 2 0.1 2 0.9 7 1 7 1 16 0.5 3 0.5 2 0.5 3
S²Matt4.753.45.60.2 4 0.2 4 0.3 4 0.2 10 0.2 4 0.2 7 0.1 9 0.1 6 0.1 6 0 2 0 1 0.1 7 0.2 3 0.3 2 0.5 3 0.1 1 0.1 1 0.1 3 0.9 5 0.9 5 0.9 11 0.5 6 0.5 4 0.5 4
IamAlpha4.75.64.440.2 3 0.2 3 0.2 2 0.2 8 0.2 5 0.2 3 0.1 4 0.1 3 0.1 7 0 8 0 5 0 1 0.3 8 0.3 5 0.5 5 0.1 9 0.2 8 0.2 6 0.8 4 0.8 3 0.8 6 0.5 1 0.5 3 0.5 2
TIMI-Net5.775.54.50.3 8 0.3 5 0.3 8 0.1 4 0.2 7 0.2 2 0.1 7 0.1 7 0.1 3 0 10 0 8 0.1 6 0.4 15 0.3 6 0.5 4 0.1 4 0.1 4 0.1 4 0.8 3 0.8 1 0.8 4 0.5 5 0.6 6 0.6 5
SIM6.47.34.87.30.3 9 0.3 6 0.3 7 0.2 13 0.2 9 0.3 14 0.1 2 0.1 1 0.1 2 0 9 0 6 0 3 0.3 9 0.3 4 0.5 6 0.1 7 0.1 5 0.2 5 0.8 2 0.8 2 0.9 7 0.6 7 0.6 5 0.9 14
HDMatt10.913.59.69.50.3 15 0.3 13 0.4 16 0.2 11 0.2 10 0.3 13 0.1 3 0.1 4 0.1 4 0 16 0 12 0 4 0.4 22 0.4 8 0.6 7 0.1 11 0.2 9 0.2 7 0.9 8 0.9 6 0.9 12 0.8 22 0.8 15 0.8 13
PIIAMatting126.515.314.30.3 7 0.3 12 0.3 11 0.1 3 0.2 13 0.3 10 0.1 6 0.2 17 0.1 9 0 5 0.1 24 0.2 30 0.3 7 0.6 33 0.8 22 0.1 6 0.1 6 0.3 19 1.1 14 1 9 0.8 5 0.5 4 0.6 8 0.6 8
Background Matting12.5910.817.60.3 10 0.3 11 0.3 13 0.2 9 0.2 17 0.4 19 0.1 5 0.2 9 0.1 11 0 7 0 7 0.1 19 0.3 10 0.4 7 0.7 10 0.1 10 0.2 10 0.3 18 0.9 6 1 8 0.9 13 0.7 15 0.8 17 1.3 38
AdaMatting13.51112.517.10.3 17 0.4 17 0.4 14 0.2 7 0.2 8 0.3 17 0.2 14 0.2 10 0.2 18 0 4 0 4 0.1 13 0.4 14 0.6 26 1 34 0.1 5 0.2 7 0.3 13 1.1 19 1.2 21 1.1 22 0.6 8 0.6 7 0.6 6
SampleNet Matting14.210.414.617.50.3 6 0.3 7 0.3 6 0.1 2 0.2 3 0.2 5 0.2 19 0.2 18 0.2 17 0 6 0 10 0.1 22 0.4 16 0.6 32 1.2 43 0.1 8 0.3 17 0.3 10 1.1 15 1.1 16 1.2 27 0.7 11 0.8 14 0.8 10
A2U Matting15.513.312.4210.3 13 0.3 10 0.4 19 0.2 16 0.2 14 0.3 9 0.2 12 0.2 11 0.1 10 0 12 0 9 0.1 9 0.4 19 0.6 24 0.8 20 0.2 13 0.2 11 0.8 49 1 9 1 10 1 19 0.7 12 0.7 10 1.2 33
GCA Matting15.615.614.416.80.3 5 0.3 8 0.4 17 0.2 17 0.2 11 0.3 16 0.2 13 0.2 13 0.2 13 0 17 0 11 0.1 5 0.5 31 0.6 31 0.8 14 0.2 16 0.2 12 0.5 32 1 10 1.1 13 1.1 21 0.7 16 0.8 16 0.9 16
ATNet Matting161815.1150.3 12 0.3 14 0.3 5 0.1 5 0.2 6 0.2 1 0.2 20 0.2 15 0.2 21 0.1 31 0.1 20 0.1 14 0.4 28 0.5 20 0.7 12 0.2 14 0.2 13 0.4 23 1.3 24 1.3 24 1.4 35 0.7 10 0.7 9 0.7 9
Context-aware Matting1821.819.4130.3 16 0.3 16 0.3 12 0.3 31 0.3 23 0.4 20 0.2 15 0.2 14 0.1 12 0 18 0.1 18 0.1 11 0.5 39 0.6 23 0.7 11 0.2 19 0.4 21 0.3 9 1.1 18 1.2 18 0.9 10 0.8 18 0.9 22 0.9 19
VDRN Matting18.621.318.615.90.3 11 0.3 9 0.3 10 0.2 19 0.2 15 0.4 21 0.1 10 0.2 12 0.1 8 0.1 36 0.1 19 0.1 12 0.5 32 0.7 36 0.8 21 0.2 18 0.2 14 0.3 12 1.1 16 1.1 15 1 15 0.9 28 1.1 29 1.1 28
FE2E High-Quality Matting18.917.419.919.40.4 19 0.4 20 0.3 9 0.3 27 0.3 20 0.4 24 0.2 18 0.2 16 0.2 16 0 13 0 16 0.1 20 0.5 30 0.8 44 1.4 45 0.2 12 0.3 16 0.3 17 1 11 1.1 14 1 17 0.6 9 0.7 13 0.6 7
Deep Matting19.618.318.5220.4 24 0.4 21 0.4 18 0.2 12 0.3 22 0.3 12 0.1 11 0.1 8 0.2 14 0 19 0 14 0.2 29 0.5 34 0.6 34 1 29 0.2 15 0.2 15 0.4 26 1.1 12 1.1 11 1.1 23 0.8 19 0.9 23 1 25
Information-flow matting20.223.319.817.60.3 18 0.4 18 0.5 23 0.3 28 0.4 27 0.5 29 0.3 24 0.3 22 0.2 24 0.1 28 0.1 23 0.1 23 0.4 27 0.4 10 0.6 8 0.2 21 0.3 18 0.3 14 1.3 23 1.2 22 0.8 2 0.8 17 0.8 18 0.9 18
DCNN Matting20.622.418.4210.4 29 0.5 23 0.7 29 0.2 18 0.3 19 0.4 23 0.2 22 0.3 23 0.2 26 0.1 25 0.1 21 0.1 15 0.4 24 0.4 9 0.8 17 0.2 23 0.4 22 0.3 16 1.3 25 1.2 19 1 20 0.7 13 0.7 11 0.9 22
IndexNet Matting23.526.122.122.40.5 41 0.6 24 0.5 20 0.2 15 0.2 12 0.3 11 0.2 17 0.3 24 0.2 15 0 14 0 15 0.1 10 0.6 44 0.7 39 1 33 0.3 31 0.3 19 0.4 22 1.1 20 1.2 20 1.1 26 0.9 27 1 24 1.4 42
AlphaGAN24.625.12622.80.3 14 0.3 15 0.4 15 0.2 14 0.2 16 0.3 8 0.2 16 0.2 19 0.2 19 0 15 0 13 0.1 16 0.6 48 0.9 49 1.1 39 0.3 33 0.5 29 0.4 27 1.3 22 1.3 25 1.2 29 1.1 39 1.4 42 1.1 29
Three-layer graph matting26.122.923.4320.4 20 0.7 26 0.6 27 0.2 20 0.3 18 0.6 40 0.2 21 0.3 21 0.2 25 0 11 0.1 17 0.2 36 0.4 25 0.4 12 1 35 0.2 26 0.5 31 0.7 45 1.7 40 1.9 43 1.5 37 0.8 20 0.8 19 0.8 11
Three Stages Matting27.324.928.628.50.4 23 0.5 22 0.6 25 0.2 21 0.4 25 0.5 30 0.3 31 0.3 31 0.3 30 0.1 33 0.2 33 0.2 45 0.4 23 0.9 48 1.4 47 0.2 22 0.4 25 0.3 8 1.6 32 1.5 33 1.3 31 0.7 14 0.7 12 0.8 12
LNSP Matting2825.928300.5 33 1.9 52 1.2 54 0.2 22 0.4 26 0.5 36 0.3 29 0.4 36 0.2 23 0 20 0.1 25 0.2 33 0.4 26 0.5 14 0.8 15 0.2 17 0.3 20 0.4 28 1.4 29 1.2 23 0.8 3 1 31 1.1 28 1.5 48
Patch-based Matting29.925.430.833.60.4 28 1.4 41 0.9 43 0.3 30 0.5 43 0.6 41 0.3 28 0.3 25 0.3 38 0 22 0.2 26 0.1 27 0.3 6 0.5 13 0.8 19 0.2 28 0.6 38 0.5 29 1.3 26 1.4 26 1.6 42 1 35 1.2 34 1.1 30
ATPM Matting31.135.933.124.30.6 42 0.8 30 0.5 22 0.3 24 0.3 21 0.5 31 0.4 58 0.5 54 0.3 45 0.1 43 0.2 37 0.2 31 0.6 47 0.7 35 0.8 16 0.3 30 0.4 27 0.4 25 1.1 13 1.1 12 0.8 1 0.9 30 1.9 49 0.9 23
KL-Divergence Based Sparse Sampling31.630.830.533.50.4 26 0.9 31 0.7 28 0.3 29 0.5 36 0.5 35 0.3 46 0.4 32 0.3 35 0.1 24 0.2 32 0.1 17 0.4 20 0.4 11 1.2 40 0.4 39 0.6 37 0.6 40 1.7 39 2 45 2.1 52 0.8 23 0.8 20 0.9 21
CCM3236.132.927.10.5 37 1.2 38 0.8 39 0.3 36 0.5 40 0.5 32 0.3 25 0.4 34 0.2 20 0.1 39 0.2 27 0.1 21 0.5 41 0.6 27 0.7 13 0.3 29 0.4 24 0.3 15 1.7 38 1.8 41 1.5 41 1.2 44 1.2 32 1.3 36
SVR Matting32.23631.928.81.1 56 2.7 60 1.2 53 0.4 51 0.4 29 0.4 27 0.3 42 0.3 28 0.2 22 0.1 27 0.2 31 0.2 39 0.3 12 0.5 19 0.7 9 0.2 25 0.4 26 0.3 20 1.4 28 1.4 27 0.9 14 1.3 47 1.2 35 1.5 46
Graph-based sparse matting32.533.132.931.50.5 39 1.5 44 0.8 32 0.3 26 0.3 24 0.3 18 0.3 39 0.4 39 0.3 32 0 21 0.2 28 0.1 26 0.5 33 0.5 16 0.9 24 0.2 24 0.6 34 0.5 31 2.2 50 2.4 52 1.9 50 1 33 1.1 26 1.3 39
Comprehensive sampling33.231.133.634.90.4 27 1.2 39 0.8 33 0.3 40 0.6 45 0.6 50 0.3 41 0.3 27 0.3 40 0.1 29 0.2 29 0.1 24 0.2 4 0.5 21 0.9 26 0.3 36 0.9 43 0.5 33 1.6 35 1.5 29 1.5 36 1 37 1.2 36 1.3 37
TSPS-RV Matting33.534.330.335.90.4 22 0.8 28 0.5 24 0.3 33 0.4 30 0.6 46 0.3 37 0.3 30 0.3 34 0 23 0.1 22 0.3 53 0.8 53 0.6 25 1 32 0.5 47 0.6 35 0.8 50 1.6 34 1.6 34 1.4 33 0.8 25 1.3 38 0.9 15
Comprehensive Weighted Color and Texture33.832.436.632.50.7 48 0.8 29 0.8 40 0.4 47 0.7 49 0.5 34 0.3 26 0.3 26 0.2 29 0.1 26 0.2 35 0.1 18 0.3 5 0.7 37 1 36 0.2 20 0.4 23 0.3 11 2.2 51 2.1 48 1.7 47 1 36 1.7 46 1.4 45
CSC Matting35.939.629.938.30.6 45 0.8 27 0.7 30 0.3 39 0.4 28 0.7 51 0.4 50 0.4 35 0.4 55 0.1 48 0.2 34 0.2 49 0.4 17 0.5 15 0.8 18 0.3 35 0.5 28 0.6 39 1.7 37 1.5 31 1.3 32 1.2 46 1.3 41 1.2 32
Sparse coded matting36.538.838.132.50.6 47 2.7 59 0.8 38 0.3 38 0.4 34 0.3 15 0.3 47 0.4 44 0.3 43 0.1 38 0.2 30 0.1 25 0.4 13 0.5 17 0.9 23 0.2 27 0.5 30 0.3 21 2.3 52 2.6 54 2.1 51 1.3 48 1.3 37 1.4 44
LocalSamplingAndKnnClassification36.53835.136.30.5 34 0.7 25 0.5 21 0.3 23 0.4 31 0.5 38 0.3 27 0.3 29 0.2 28 0.1 32 0.2 38 0.2 38 0.9 55 1 50 1.7 52 0.6 51 1 47 0.9 51 1.8 41 1.5 30 1.2 28 1.1 41 1.2 31 1.2 34
Global Sampling Matting38.134.441.438.60.4 25 2.3 55 0.9 42 0.3 34 0.6 44 0.6 48 0.3 33 0.4 48 0.3 31 0.1 34 0.3 44 0.2 42 0.5 36 0.6 22 1 30 0.4 41 1 46 0.7 43 1.9 43 2 47 1.7 46 0.9 29 1 25 1.1 27
Weighted Color and Texture Matting38.336.439.539.10.5 38 0.9 32 0.8 31 0.4 43 0.6 46 0.6 47 0.3 23 0.3 20 0.2 27 0.1 42 0.5 53 0.2 47 0.5 35 0.8 41 1.5 49 0.3 32 0.5 32 0.5 30 1.6 33 1.6 36 1.5 39 1.2 45 2.6 56 1.4 43
LNCLM matting3941.638.436.90.4 21 0.4 19 0.9 44 0.4 46 0.5 39 0.4 22 0.4 57 0.6 58 0.3 44 0.1 53 0.3 42 0.2 48 0.6 50 0.8 40 1.1 37 0.4 38 0.9 45 0.5 34 1.8 42 1.6 37 1.1 25 0.8 26 1.1 27 1.3 41
Iterative Transductive Matting3940.537.5390.6 43 0.9 33 0.8 37 0.3 32 0.7 47 0.6 45 0.4 52 0.4 38 0.3 39 0.1 44 0.5 55 0.2 44 0.6 43 0.6 30 1.4 48 0.4 45 0.8 41 0.7 42 1.9 44 1.6 35 1.5 40 0.8 21 0.9 21 0.9 17
KNN Matting39.342.840.634.60.8 51 1 35 0.8 35 0.4 45 0.5 42 0.5 28 0.4 51 0.5 51 0.3 53 0.1 49 0.3 45 0.2 50 0.7 52 0.9 47 0.9 28 0.3 34 0.5 33 0.4 24 1.1 17 1.1 17 0.9 9 1.2 43 2.3 55 1.6 50
Shared Matting39.438.142.637.40.5 30 1.6 46 0.9 41 0.5 53 0.9 54 0.5 39 0.3 30 0.4 33 0.3 42 0.1 45 0.4 48 0.2 35 0.4 21 0.6 29 0.9 25 0.4 37 0.6 36 0.5 35 2.9 57 2.8 56 2.7 56 1 32 1.3 39 1 26
Segmentation-based matting42.343.141.642.30.5 40 2.2 53 1.1 48 0.3 41 0.4 32 0.4 25 0.3 38 0.4 46 0.3 36 0.1 30 0.2 36 0.2 28 0.6 45 0.5 18 1.2 44 0.4 44 0.7 39 0.8 48 2.7 55 3.3 59 3.6 58 1.4 52 1.9 50 1.6 51
Improved color matting42.744.343.840.10.8 53 2.4 56 1.5 57 0.3 37 0.5 38 0.5 37 0.3 32 0.4 47 0.3 33 0.1 46 0.3 43 0.2 40 0.7 51 0.7 38 0.9 27 0.4 40 0.7 40 0.7 44 2 46 1.9 44 1.4 34 1.3 49 1.5 44 1.5 49
Improving Sampling Criterion43.541.845.9430.5 31 1.3 40 0.8 34 0.6 56 1 55 0.7 53 0.3 44 0.5 55 0.3 51 0.3 61 0.8 60 0.4 60 0.5 38 0.9 46 1.2 41 0.6 53 1.1 49 0.8 47 1.4 27 1.5 32 1.5 38 0.8 24 1.1 30 0.9 20
SRLO Matting44.443.945.943.50.7 50 1 34 1 45 0.4 49 0.8 53 0.7 52 0.4 49 0.4 41 0.3 52 0.1 50 0.6 56 0.2 43 0.4 29 0.8 42 1.5 50 0.4 43 1 48 0.6 38 2 47 2.3 50 1.7 44 1 34 1.4 43 1 24
Learning Based Matting45.746.446.444.40.8 54 1.6 45 1.3 55 0.4 48 0.4 35 0.5 33 0.3 40 0.4 45 0.3 41 0.1 41 0.2 39 0.2 34 0.5 42 1.2 53 2 54 0.9 59 1.7 58 2 60 1.6 31 1.7 39 1 18 2.2 56 2.7 57 4.2 60
Local Spline Regression (LSR)4646.644.946.40.5 32 1.5 42 1 46 0.3 35 0.5 41 0.6 43 0.4 48 0.4 50 0.3 46 0.1 40 0.3 41 0.2 41 1.2 59 1.3 57 2.2 56 0.8 57 1.1 50 1.1 53 2.1 49 1.7 38 1.3 30 1.5 53 1.3 40 3 56
Global Sampling Matting (filter version)46.443.947.847.50.6 44 2.4 57 1.1 49 0.5 52 0.7 50 0.7 56 0.4 54 0.5 53 0.4 57 0.2 54 0.4 47 0.3 56 0.3 11 0.6 28 1 31 0.5 49 1.2 53 0.8 46 2 45 2.2 49 2.4 54 1.2 42 1.5 45 1.1 31
SPS matting46.443.451.8440.5 35 1.6 47 0.6 26 0.7 57 1.1 57 0.7 54 0.4 56 0.6 59 0.4 56 0.2 59 0.9 61 0.3 54 0.4 18 0.8 45 1.2 42 0.5 48 1.2 52 0.6 37 1.7 36 2 46 1.7 43 1.1 38 1.7 47 1.3 40
Closed-Form Matting46.544.146.349.30.5 36 1.8 51 1.1 50 0.3 25 0.4 33 0.6 42 0.3 35 0.4 43 0.3 37 0.1 35 0.3 40 0.2 37 1.2 58 1.4 58 2.3 59 0.8 56 1.6 57 1.6 58 3 58 2.7 55 1.9 49 1.3 50 1.2 33 5 62
LMSPIR46.946.547.546.60.8 52 1.1 36 1.2 51 0.4 44 0.8 52 0.6 49 0.3 45 0.4 37 0.3 48 0.1 47 0.5 52 0.2 46 0.6 49 1.2 56 2 55 0.4 42 0.9 44 0.6 36 2.3 53 2.3 51 2.2 53 1.1 40 2 52 1.2 35
Shared Matting (Real Time)4948.849.448.80.6 46 1.7 50 1 47 0.7 59 1.2 58 0.8 58 0.3 36 0.4 40 0.3 50 0.2 56 0.6 57 0.2 52 0.5 37 0.8 43 1.1 38 0.4 46 0.8 42 0.6 41 3 59 3 57 3 57 1.3 51 1.9 48 1.5 47
Large Kernel Matting50.252.649.848.31.2 58 1.6 48 1.7 58 0.3 42 0.5 37 0.4 26 0.4 53 0.5 52 0.3 54 0.1 51 0.5 54 0.2 51 0.9 56 1.1 52 1.4 46 0.6 52 1.1 51 1 52 2.7 54 2.4 53 1.7 45 2.1 55 2 51 2.8 54
Robust Matting51.647.352.854.91.1 57 2.8 61 1.7 59 0.7 58 1.5 59 0.9 59 0.3 34 0.4 49 0.3 47 0.1 52 0.5 50 0.3 55 0.5 40 1.2 54 1.9 53 0.5 50 1.5 56 1.2 56 1.5 30 1.8 40 2.6 55 2.4 57 2.3 53 2.9 55
Cell-based matting Laplacian51.85450.850.80.7 49 1.7 49 0.8 36 0.4 50 0.8 51 0.6 44 0.5 59 0.5 56 0.4 61 0.2 60 0.5 49 0.3 58 0.8 54 1 51 1.5 51 0.8 58 1.3 54 1.2 55 2 48 1.8 42 1.8 48 1.9 54 2.3 54 2.4 53
Transfusive Weights53.353.951.354.91.3 59 1.5 43 1.3 56 0.5 55 0.7 48 0.7 55 0.4 55 0.6 57 0.4 59 0.2 57 0.5 51 0.3 59 1.6 61 2 60 3.9 61 1.5 61 2.2 61 2.2 62