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
LFPNet3.23.32.14.30.2 1 0.2 1 0.3 1 0.2 6 0.1 1 0.2 4 0.1 7 0.1 3 0.1 4 0 2 0 2 0.1 7 0.2 1 0.2 1 0.4 1 0.1 2 0.1 2 0.1 1 0.9 6 1 6 1 15 0.5 1 0.5 1 0.5 1
S²Matt3.53.92.44.10.2 2 0.2 2 0.3 2 0.2 9 0.2 4 0.2 5 0.1 8 0.1 4 0.1 5 0 1 0 1 0.1 6 0.2 2 0.3 2 0.5 2 0.1 1 0.1 1 0.1 2 0.9 4 0.9 3 0.9 9 0.5 4 0.5 2 0.5 2
TIMI-Net4.65.84.33.80.3 6 0.3 3 0.3 6 0.1 3 0.2 6 0.2 2 0.1 6 0.1 5 0.1 2 0 9 0 6 0.1 5 0.4 14 0.3 5 0.5 4 0.1 3 0.1 3 0.1 3 0.8 2 0.8 1 0.8 4 0.5 3 0.6 5 0.6 4
SIM5.263.660.3 7 0.3 4 0.3 5 0.2 12 0.2 8 0.3 13 0.1 1 0.1 1 0.1 1 0 8 0 4 0 1 0.3 8 0.3 3 0.5 5 0.1 6 0.1 4 0.2 4 0.8 1 0.8 2 0.9 6 0.6 5 0.6 3 0.9 13
IamAlpha7.26.97.67.10.3 15 0.3 13 0.4 12 0.2 5 0.2 2 0.2 6 0.1 3 0.2 8 0.2 15 0 7 0 14 0 3 0.3 7 0.3 4 0.5 3 0.1 9 0.2 12 0.2 5 0.8 3 0.9 4 0.9 10 0.6 6 0.6 4 0.6 3
HDMatt9.612.48.18.40.3 13 0.3 11 0.4 15 0.2 10 0.2 9 0.3 12 0.1 2 0.1 2 0.1 3 0 15 0 10 0 2 0.4 21 0.4 7 0.6 6 0.1 10 0.2 7 0.2 6 0.9 7 0.9 5 0.9 11 0.8 21 0.8 14 0.8 12
PIIAMatting10.85.314.113.10.3 5 0.3 10 0.3 9 0.1 2 0.2 12 0.3 9 0.1 5 0.2 16 0.1 7 0 4 0.1 23 0.2 29 0.3 6 0.6 32 0.8 21 0.1 5 0.1 5 0.3 18 1.1 13 1 8 0.8 5 0.5 2 0.6 7 0.6 7
Background Matting11.17.89.316.40.3 8 0.3 9 0.3 11 0.2 8 0.2 16 0.4 18 0.1 4 0.2 7 0.1 9 0 6 0 5 0.1 18 0.3 9 0.4 6 0.7 9 0.1 8 0.2 8 0.3 17 0.9 5 1 7 0.9 12 0.7 14 0.8 16 1.3 37
AdaMatting12.610.111.516.10.3 16 0.4 16 0.4 13 0.2 7 0.2 7 0.3 16 0.2 13 0.2 9 0.2 17 0 3 0 3 0.1 12 0.4 13 0.6 25 1 33 0.1 4 0.2 6 0.3 12 1.1 18 1.2 20 1.1 21 0.6 7 0.6 6 0.6 5
SampleNet Matting139.313.516.30.3 4 0.3 5 0.3 4 0.1 1 0.2 3 0.2 3 0.2 18 0.2 17 0.2 16 0 5 0 8 0.1 21 0.4 15 0.6 31 1.2 42 0.1 7 0.3 16 0.3 9 1.1 14 1.1 15 1.2 26 0.7 10 0.8 13 0.8 9
A2U Matting14.312.11119.90.3 11 0.3 8 0.4 18 0.2 15 0.2 13 0.3 8 0.2 11 0.2 10 0.1 8 0 11 0 7 0.1 8 0.4 18 0.6 23 0.8 19 0.2 12 0.2 9 0.8 48 1 8 1 9 1 18 0.7 11 0.7 9 1.2 32
GCA Matting14.414.51315.60.3 3 0.3 6 0.4 16 0.2 16 0.2 10 0.3 15 0.2 12 0.2 12 0.2 11 0 16 0 9 0.1 4 0.5 30 0.6 30 0.8 13 0.2 15 0.2 10 0.5 31 1 9 1.1 12 1.1 20 0.7 15 0.8 15 0.9 15
ATNet Matting14.916.913.9140.3 10 0.3 12 0.3 3 0.1 4 0.2 5 0.2 1 0.2 19 0.2 14 0.2 20 0.1 30 0.1 19 0.1 13 0.4 27 0.5 19 0.7 11 0.2 13 0.2 11 0.4 22 1.3 23 1.3 23 1.4 34 0.7 9 0.7 8 0.7 8
Context-aware Matting16.920.618.411.60.3 14 0.3 15 0.3 10 0.3 30 0.3 22 0.4 19 0.2 14 0.2 13 0.1 10 0 17 0.1 17 0.1 10 0.5 38 0.6 22 0.7 10 0.2 18 0.4 20 0.3 8 1.1 17 1.2 17 0.9 8 0.8 17 0.9 21 0.9 18
VDRN Matting17.420.117.514.60.3 9 0.3 7 0.3 8 0.2 18 0.2 14 0.4 20 0.1 9 0.2 11 0.1 6 0.1 35 0.1 18 0.1 11 0.5 31 0.7 35 0.8 20 0.2 17 0.2 13 0.3 11 1.1 15 1.1 14 1 14 0.9 27 1.1 28 1.1 27
FE2E High-Quality Matting17.816.418.918.10.4 18 0.4 19 0.3 7 0.3 26 0.3 19 0.4 23 0.2 17 0.2 15 0.2 14 0 12 0 15 0.1 19 0.5 29 0.8 43 1.4 44 0.2 11 0.3 15 0.3 16 1 10 1.1 13 1 16 0.6 8 0.7 12 0.6 6
Deep Matting18.517.317.320.90.4 23 0.4 20 0.4 17 0.2 11 0.3 21 0.3 11 0.1 10 0.1 6 0.2 12 0 18 0 12 0.2 28 0.5 33 0.6 33 1 28 0.2 14 0.2 14 0.4 25 1.1 11 1.1 10 1.1 22 0.8 18 0.9 22 1 24
Information-flow matting19.322.318.816.80.3 17 0.4 17 0.5 22 0.3 27 0.4 26 0.5 28 0.3 23 0.3 21 0.2 23 0.1 27 0.1 22 0.1 22 0.4 26 0.4 9 0.6 7 0.2 20 0.3 17 0.3 13 1.3 22 1.2 21 0.8 2 0.8 16 0.8 17 0.9 17
DCNN Matting19.621.417.4200.4 28 0.5 22 0.7 28 0.2 17 0.3 18 0.4 22 0.2 21 0.3 22 0.2 25 0.1 24 0.1 20 0.1 14 0.4 23 0.4 8 0.8 16 0.2 22 0.4 21 0.3 15 1.3 24 1.2 18 1 19 0.7 12 0.7 10 0.9 21
IndexNet Matting22.525.12121.30.5 40 0.6 23 0.5 19 0.2 14 0.2 11 0.3 10 0.2 16 0.3 23 0.2 13 0 13 0 13 0.1 9 0.6 43 0.7 38 1 32 0.3 30 0.3 18 0.4 21 1.1 19 1.2 19 1.1 25 0.9 26 1 23 1.4 41
AlphaGAN23.52424.921.80.3 12 0.3 14 0.4 14 0.2 13 0.2 15 0.3 7 0.2 15 0.2 18 0.2 18 0 14 0 11 0.1 15 0.6 47 0.9 48 1.1 38 0.3 32 0.5 28 0.4 26 1.3 21 1.3 24 1.2 28 1.1 38 1.4 41 1.1 28
Three-layer graph matting25.121.922.4310.4 19 0.7 25 0.6 26 0.2 19 0.3 17 0.6 39 0.2 20 0.3 20 0.2 24 0 10 0.1 16 0.2 35 0.4 24 0.4 11 1 34 0.2 25 0.5 30 0.7 44 1.7 39 1.9 42 1.5 36 0.8 19 0.8 18 0.8 10
Three Stages Matting26.323.927.627.50.4 22 0.5 21 0.6 24 0.2 20 0.4 24 0.5 29 0.3 30 0.3 30 0.3 29 0.1 32 0.2 32 0.2 44 0.4 22 0.9 47 1.4 46 0.2 21 0.4 24 0.3 7 1.6 31 1.5 32 1.3 30 0.7 13 0.7 11 0.8 11
LNSP Matting2724.92729.10.5 32 1.9 51 1.2 53 0.2 21 0.4 25 0.5 35 0.3 28 0.4 35 0.2 22 0 19 0.1 24 0.2 32 0.4 25 0.5 13 0.8 14 0.2 16 0.3 19 0.4 27 1.4 28 1.2 22 0.8 3 1 30 1.1 27 1.5 47
Patch-based Matting28.924.429.832.60.4 27 1.4 40 0.9 42 0.3 29 0.5 42 0.6 40 0.3 27 0.3 24 0.3 37 0 21 0.2 25 0.1 26 0.3 5 0.5 12 0.8 18 0.2 27 0.6 37 0.5 28 1.3 25 1.4 25 1.6 41 1 34 1.2 33 1.1 29
ATPM Matting30.134.932.123.40.6 41 0.8 29 0.5 21 0.3 23 0.3 20 0.5 30 0.4 57 0.5 53 0.3 44 0.1 42 0.2 36 0.2 30 0.6 46 0.7 34 0.8 15 0.3 29 0.4 26 0.4 24 1.1 12 1.1 11 0.8 1 0.9 29 1.9 48 0.9 22
KL-Divergence Based Sparse Sampling30.629.829.532.50.4 25 0.9 30 0.7 27 0.3 28 0.5 35 0.5 34 0.3 45 0.4 31 0.3 34 0.1 23 0.2 31 0.1 16 0.4 19 0.4 10 1.2 39 0.4 38 0.6 36 0.6 39 1.7 38 2 44 2.1 51 0.8 22 0.8 19 0.9 20
CCM3135.131.926.10.5 36 1.2 37 0.8 38 0.3 35 0.5 39 0.5 31 0.3 24 0.4 33 0.2 19 0.1 38 0.2 26 0.1 20 0.5 40 0.6 26 0.7 12 0.3 28 0.4 23 0.3 14 1.7 37 1.8 40 1.5 40 1.2 43 1.2 31 1.3 35
SVR Matting31.23530.927.81.1 55 2.7 59 1.2 52 0.4 50 0.4 28 0.4 26 0.3 41 0.3 27 0.2 21 0.1 26 0.2 30 0.2 38 0.3 11 0.5 18 0.7 8 0.2 24 0.4 25 0.3 19 1.4 27 1.4 26 0.9 13 1.3 46 1.2 34 1.5 45
Graph-based sparse matting31.532.131.930.50.5 38 1.5 43 0.8 31 0.3 25 0.3 23 0.3 17 0.3 38 0.4 38 0.3 31 0 20 0.2 27 0.1 25 0.5 32 0.5 15 0.9 23 0.2 23 0.6 33 0.5 30 2.2 49 2.4 51 1.9 49 1 32 1.1 25 1.3 38
Comprehensive sampling32.230.132.633.90.4 26 1.2 38 0.8 32 0.3 39 0.6 44 0.6 49 0.3 40 0.3 26 0.3 39 0.1 28 0.2 28 0.1 23 0.2 3 0.5 20 0.9 25 0.3 35 0.9 42 0.5 32 1.6 34 1.5 28 1.5 35 1 36 1.2 35 1.3 36
TSPS-RV Matting32.533.329.334.90.4 21 0.8 27 0.5 23 0.3 32 0.4 29 0.6 45 0.3 36 0.3 29 0.3 33 0 22 0.1 21 0.3 52 0.8 52 0.6 24 1 31 0.5 46 0.6 34 0.8 49 1.6 33 1.6 33 1.4 32 0.8 24 1.3 37 0.9 14
Comprehensive Weighted Color and Texture32.831.435.631.50.7 47 0.8 28 0.8 39 0.4 46 0.7 48 0.5 33 0.3 25 0.3 25 0.2 28 0.1 25 0.2 34 0.1 17 0.3 4 0.7 36 1 35 0.2 19 0.4 22 0.3 10 2.2 50 2.1 47 1.7 46 1 35 1.7 45 1.4 44
CSC Matting34.938.628.937.30.6 44 0.8 26 0.7 29 0.3 38 0.4 27 0.7 50 0.4 49 0.4 34 0.4 54 0.1 47 0.2 33 0.2 48 0.4 16 0.5 14 0.8 17 0.3 34 0.5 27 0.6 38 1.7 36 1.5 30 1.3 31 1.2 45 1.3 40 1.2 31
Sparse coded matting35.537.837.131.50.6 46 2.7 58 0.8 37 0.3 37 0.4 33 0.3 14 0.3 46 0.4 43 0.3 42 0.1 37 0.2 29 0.1 24 0.4 12 0.5 16 0.9 22 0.2 26 0.5 29 0.3 20 2.3 51 2.6 53 2.1 50 1.3 47 1.3 36 1.4 43
LocalSamplingAndKnnClassification35.53734.135.30.5 33 0.7 24 0.5 20 0.3 22 0.4 30 0.5 37 0.3 26 0.3 28 0.2 27 0.1 31 0.2 37 0.2 37 0.9 54 1 49 1.7 51 0.6 50 1 46 0.9 50 1.8 40 1.5 29 1.2 27 1.1 40 1.2 30 1.2 33
Global Sampling Matting37.133.440.437.60.4 24 2.3 54 0.9 41 0.3 33 0.6 43 0.6 47 0.3 32 0.4 47 0.3 30 0.1 33 0.3 43 0.2 41 0.5 35 0.6 21 1 29 0.4 40 1 45 0.7 42 1.9 42 2 46 1.7 45 0.9 28 1 24 1.1 26
Weighted Color and Texture Matting37.335.438.538.10.5 37 0.9 31 0.8 30 0.4 42 0.6 45 0.6 46 0.3 22 0.3 19 0.2 26 0.1 41 0.5 52 0.2 46 0.5 34 0.8 40 1.5 48 0.3 31 0.5 31 0.5 29 1.6 32 1.6 35 1.5 38 1.2 44 2.6 55 1.4 42
LNCLM matting3840.637.435.90.4 20 0.4 18 0.9 43 0.4 45 0.5 38 0.4 21 0.4 56 0.6 57 0.3 43 0.1 52 0.3 41 0.2 47 0.6 49 0.8 39 1.1 36 0.4 37 0.9 44 0.5 33 1.8 41 1.6 36 1.1 24 0.8 25 1.1 26 1.3 40
Iterative Transductive Matting3839.536.5380.6 42 0.9 32 0.8 36 0.3 31 0.7 46 0.6 44 0.4 51 0.4 37 0.3 38 0.1 43 0.5 54 0.2 43 0.6 42 0.6 29 1.4 47 0.4 44 0.8 40 0.7 41 1.9 43 1.6 34 1.5 39 0.8 20 0.9 20 0.9 16
KNN Matting38.341.839.633.50.8 50 1 34 0.8 34 0.4 44 0.5 41 0.5 27 0.4 50 0.5 50 0.3 52 0.1 48 0.3 44 0.2 49 0.7 51 0.9 46 0.9 27 0.3 33 0.5 32 0.4 23 1.1 16 1.1 16 0.9 7 1.2 42 2.3 54 1.6 49
Shared Matting38.437.141.636.40.5 29 1.6 45 0.9 40 0.5 52 0.9 53 0.5 38 0.3 29 0.4 32 0.3 41 0.1 44 0.4 47 0.2 34 0.4 20 0.6 28 0.9 24 0.4 36 0.6 35 0.5 34 2.9 56 2.8 55 2.7 55 1 31 1.3 38 1 25
Segmentation-based matting41.342.140.641.30.5 39 2.2 52 1.1 47 0.3 40 0.4 31 0.4 24 0.3 37 0.4 45 0.3 35 0.1 29 0.2 35 0.2 27 0.6 44 0.5 17 1.2 43 0.4 43 0.7 38 0.8 47 2.7 54 3.3 58 3.6 57 1.4 51 1.9 49 1.6 50
Improved color matting41.743.342.839.10.8 52 2.4 55 1.5 56 0.3 36 0.5 37 0.5 36 0.3 31 0.4 46 0.3 32 0.1 45 0.3 42 0.2 39 0.7 50 0.7 37 0.9 26 0.4 39 0.7 39 0.7 43 2 45 1.9 43 1.4 33 1.3 48 1.5 43 1.5 48
Improving Sampling Criterion42.540.844.9420.5 30 1.3 39 0.8 33 0.6 55 1 54 0.7 52 0.3 43 0.5 54 0.3 50 0.3 60 0.8 59 0.4 59 0.5 37 0.9 45 1.2 40 0.6 52 1.1 48 0.8 46 1.4 26 1.5 31 1.5 37 0.8 23 1.1 29 0.9 19
SRLO Matting43.442.944.942.50.7 49 1 33 1 44 0.4 48 0.8 52 0.7 51 0.4 48 0.4 40 0.3 51 0.1 49 0.6 55 0.2 42 0.4 28 0.8 41 1.5 49 0.4 42 1 47 0.6 37 2 46 2.3 49 1.7 43 1 33 1.4 42 1 23
Learning Based Matting44.745.445.443.40.8 53 1.6 44 1.3 54 0.4 47 0.4 34 0.5 32 0.3 39 0.4 44 0.3 40 0.1 40 0.2 38 0.2 33 0.5 41 1.2 52 2 53 0.9 58 1.7 57 2 59 1.6 30 1.7 38 1 17 2.2 55 2.7 56 4.2 59
Local Spline Regression (LSR)4545.643.945.40.5 31 1.5 41 1 45 0.3 34 0.5 40 0.6 42 0.4 47 0.4 49 0.3 45 0.1 39 0.3 40 0.2 40 1.2 58 1.3 56 2.2 55 0.8 56 1.1 49 1.1 52 2.1 48 1.7 37 1.3 29 1.5 52 1.3 39 3 55
Global Sampling Matting (filter version)45.442.946.846.50.6 43 2.4 56 1.1 48 0.5 51 0.7 49 0.7 55 0.4 53 0.5 52 0.4 56 0.2 53 0.4 46 0.3 55 0.3 10 0.6 27 1 30 0.5 48 1.2 52 0.8 45 2 44 2.2 48 2.4 53 1.2 41 1.5 44 1.1 30
SPS matting45.442.450.8430.5 34 1.6 46 0.6 25 0.7 56 1.1 56 0.7 53 0.4 55 0.6 58 0.4 55 0.2 58 0.9 60 0.3 53 0.4 17 0.8 44 1.2 41 0.5 47 1.2 51 0.6 36 1.7 35 2 45 1.7 42 1.1 37 1.7 46 1.3 39
Closed-Form Matting45.543.145.348.30.5 35 1.8 50 1.1 49 0.3 24 0.4 32 0.6 41 0.3 34 0.4 42 0.3 36 0.1 34 0.3 39 0.2 36 1.2 57 1.4 57 2.3 58 0.8 55 1.6 56 1.6 57 3 57 2.7 54 1.9 48 1.3 49 1.2 32 5 61
LMSPIR45.945.546.545.60.8 51 1.1 35 1.2 50 0.4 43 0.8 51 0.6 48 0.3 44 0.4 36 0.3 47 0.1 46 0.5 51 0.2 45 0.6 48 1.2 55 2 54 0.4 41 0.9 43 0.6 35 2.3 52 2.3 50 2.2 52 1.1 39 2 51 1.2 34
Shared Matting (Real Time)4847.848.447.80.6 45 1.7 49 1 46 0.7 58 1.2 57 0.8 57 0.3 35 0.4 39 0.3 49 0.2 55 0.6 56 0.2 51 0.5 36 0.8 42 1.1 37 0.4 45 0.8 41 0.6 40 3 58 3 56 3 56 1.3 50 1.9 47 1.5 46
Large Kernel Matting49.251.648.847.31.2 57 1.6 47 1.7 57 0.3 41 0.5 36 0.4 25 0.4 52 0.5 51 0.3 53 0.1 50 0.5 53 0.2 50 0.9 55 1.1 51 1.4 45 0.6 51 1.1 50 1 51 2.7 53 2.4 52 1.7 44 2.1 54 2 50 2.8 53
Robust Matting50.646.351.853.91.1 56 2.8 60 1.7 58 0.7 57 1.5 58 0.9 58 0.3 33 0.4 48 0.3 46 0.1 51 0.5 49 0.3 54 0.5 39 1.2 53 1.9 52 0.5 49 1.5 55 1.2 55 1.5 29 1.8 39 2.6 54 2.4 56 2.3 52 2.9 54
Cell-based matting Laplacian50.85349.849.80.7 48 1.7 48 0.8 35 0.4 49 0.8 50 0.6 43 0.5 58 0.5 55 0.4 60 0.2 59 0.5 48 0.3 57 0.8 53 1 50 1.5 50 0.8 57 1.3 53 1.2 54 2 47 1.8 41 1.8 47 1.9 53 2.3 53 2.4 52
Transfusive Weights52.352.950.353.91.3 58 1.5 42 1.3 55 0.5 54 0.7 47 0.7 54 0.4 54 0.6 56 0.4 58 0.2 56 0.5 50 0.3 58 1.6 60 2 59 3.9 60 1.5 60 2.2 60 2.2 61 1.2 20 1.4 27 1.1 23 4.4 61 4.9 61 5.9 62
High-res matting52.550.554.852.31.3 59 2.2 53 2.2 59 0.5 53 1.1 55 0.8 56 0.3 42 0.4 41 0.3 48 0.1 36 0.7 57 0.2 31 0.6 45 1.2 54 2.2 56 0.8 53 2 59 1.4 56