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
TransMatting2.832.52.80.1 3 0.1 1 0.1 1 0.1 2 0.1 1 0.1 4 0.1 3 0.1 2 0.1 1 0.1 2 0.1 2 0.2 2 0.8 3 0.9 2 1.3 2 0.3 3 0.4 2 0.5 2 0.6 7 0.6 7 0.6 7 0.2 1 0.2 3 0.3 3
LFPNet2.82.52.63.40.1 1 0.1 3 0.1 2 0.1 3 0.1 3 0.2 5 0.1 4 0.1 4 0.1 2 0.1 3 0.1 1 0.3 6 0.7 1 0.7 1 1.1 1 0.3 1 0.3 1 0.5 1 0.4 1 0.5 3 0.6 5 0.2 6 0.3 5 0.3 5
TMFNet3.92.63.95.10.1 2 0.1 2 0.2 5 0.1 1 0.1 8 0.2 9 0.1 1 0.1 1 0.2 7 0.1 1 0.1 3 0.3 4 0.7 2 0.9 3 1.5 6 0.3 2 0.4 4 0.7 5 0.5 5 0.6 6 0.5 3 0.3 7 0.3 4 0.2 2
IamAlpha4.86.35.13.10.1 4 0.1 4 0.1 3 0.1 5 0.1 2 0.1 1 0.2 11 0.2 9 0.2 6 0.2 9 0.2 7 0.2 1 0.9 4 1 5 1.4 5 0.6 11 0.7 9 0.9 7 0.5 4 0.5 4 0.5 1 0.2 2 0.2 1 0.2 1
SIM6.27.65.15.80.2 8 0.2 9 0.2 6 0.1 16 0.1 9 0.3 19 0.2 9 0.1 5 0.2 3 0.2 8 0.1 5 0.3 5 1 6 1 4 1.4 3 0.5 7 0.5 5 0.7 4 0.4 2 0.5 2 0.5 2 0.2 5 0.2 2 0.3 4
TIMI-Net6.27.16.550.2 9 0.2 8 0.2 7 0.1 13 0.1 12 0.1 3 0.1 6 0.1 6 0.2 4 0.2 10 0.1 6 0.3 7 1.1 8 1 6 1.4 4 0.3 4 0.4 3 0.5 3 0.4 3 0.5 1 0.6 6 0.2 4 0.4 10 0.3 6
HDMatt8.79.479.60.2 17 0.2 7 0.2 24 0.1 10 0.1 11 0.3 18 0.1 2 0.1 3 0.2 5 0.2 12 0.2 9 0.3 3 1.1 11 1.2 7 1.6 7 0.6 8 0.6 7 0.9 8 0.5 6 0.5 5 0.6 4 0.3 9 0.4 7 0.4 8
A2U Matting11.310.38.415.40.2 16 0.2 13 0.2 35 0.1 8 0.1 5 0.2 11 0.1 8 0.2 8 0.2 9 0.2 11 0.2 8 0.4 10 1.1 9 1.3 9 1.9 9 0.6 10 0.7 10 1.7 27 0.6 9 0.6 8 0.6 10 0.3 11 0.3 6 0.4 12
PIIAMatting11.87.912.115.30.1 6 0.2 14 0.2 10 0.1 7 0.1 4 0.2 10 0.1 5 0.2 13 0.2 14 0.1 5 0.4 21 0.6 47 0.9 5 1.5 13 1.9 12 0.4 6 0.7 8 1.2 14 1.4 26 0.7 10 0.6 8 0.2 3 0.4 14 0.3 7
AdaMatting12.38.51018.40.2 13 0.2 15 0.2 32 0.1 4 0.1 6 0.4 42 0.2 14 0.2 12 0.2 11 0.1 4 0.1 4 0.3 9 1.1 7 1.4 10 2.3 20 0.4 5 0.6 6 0.9 6 0.9 13 1 14 0.9 17 0.3 8 0.4 13 0.4 10
GCA Matting12.812.611.514.10.1 7 0.1 5 0.2 13 0.1 15 0.1 14 0.3 20 0.2 13 0.2 15 0.2 15 0.2 15 0.2 11 0.3 8 1.3 17 1.6 18 1.9 10 0.7 12 0.8 11 1.4 20 0.6 8 0.7 9 0.6 9 0.4 14 0.4 9 0.4 18
Context-aware Matting13.714.814.511.80.2 10 0.2 12 0.2 4 0.1 11 0.2 16 0.2 8 0.2 16 0.2 16 0.2 10 0.2 18 0.4 18 0.4 20 1.4 21 1.5 11 1.8 8 0.8 14 1.3 18 1 9 1.1 16 1.1 17 0.9 24 0.4 12 0.4 8 0.4 11
SampleNet Matting14.210.11220.40.1 5 0.1 6 0.2 31 0.1 6 0.1 15 0.2 7 0.2 18 0.3 17 0.3 17 0.1 7 0.2 10 0.5 25 1.1 12 1.5 12 2.7 32 0.6 9 0.9 12 1 10 0.8 11 0.9 12 0.9 28 0.4 13 0.4 12 0.4 13
IndexNet Matting17.616.316.320.40.2 12 0.2 11 0.2 14 0.1 12 0.1 10 0.3 14 0.2 10 0.2 14 0.2 8 0.2 13 0.2 12 0.4 12 1.7 30 1.9 28 2.5 25 1 18 1.1 16 1.3 17 1.1 18 1.2 21 1.2 50 0.4 17 0.5 18 0.5 23
ATNet Matting18.119.815.918.80.2 25 0.2 19 0.2 8 0.1 9 0.1 7 0.1 2 0.2 15 0.2 11 0.2 16 0.4 29 0.4 19 0.5 30 1.1 14 1.3 8 2.2 16 0.9 16 1.1 15 1.2 13 1.5 40 1.4 37 1.2 56 0.3 10 0.4 11 0.4 9
VDRN Matting18.720.616.4190.2 15 0.2 10 0.2 9 0.1 14 0.1 13 0.3 25 0.2 12 0.2 10 0.2 13 0.4 31 0.3 16 0.5 22 1.4 23 1.6 17 1.9 11 0.8 15 0.9 14 1.1 11 0.9 12 0.9 13 0.7 11 0.7 43 0.7 38 0.7 50
AlphaGAN22.421.420.425.50.2 27 0.2 17 0.2 28 0.2 19 0.2 17 0.3 15 0.2 17 0.3 18 0.3 18 0.2 14 0.2 13 0.4 16 1.8 33 2.4 40 2.7 36 1.1 24 1.4 22 1.5 23 0.9 14 1.1 15 1 31 0.5 23 0.5 21 0.6 37
Deep Matting22.519.519.528.60.4 57 0.4 54 0.5 57 0.2 17 0.2 25 0.2 6 0.1 7 0.1 7 0.2 12 0.2 17 0.2 14 0.6 46 1.3 19 1.5 16 2.4 23 0.8 13 0.9 13 1.3 19 0.7 10 0.8 11 1.1 42 0.4 16 0.5 16 0.5 24
DCNN Matting23.72723.620.40.2 21 0.2 18 0.2 16 0.2 32 0.3 33 0.3 17 0.3 20 0.4 24 0.3 19 0.3 23 0.4 17 0.4 11 1.5 25 1.5 15 2.1 13 1.1 22 1.3 20 1.5 21 1.5 42 1.4 36 1 32 0.6 31 0.6 26 0.5 34
Information-flow matting25.328.123.923.90.2 18 0.2 16 0.2 25 0.2 36 0.2 26 0.4 44 0.4 34 0.4 30 0.4 29 0.3 24 0.4 20 0.4 19 1.7 32 1.8 25 2.2 14 0.9 17 1.3 19 1.3 16 1.5 38 1.4 30 0.8 13 0.5 26 0.6 25 0.5 31
Three-layer graph matting27.323.625.4330.2 11 0.2 20 0.2 29 0.2 26 0.2 21 0.4 47 0.3 19 0.4 20 0.3 20 0.1 6 0.3 15 0.5 29 1.6 27 1.7 20 2.7 34 1.1 25 1.9 32 2.4 44 1.6 53 1.6 53 1 41 0.5 22 0.6 22 0.4 20
Graph-based sparse matting28.125.927.431.10.2 34 0.3 28 0.2 15 0.2 24 0.2 22 0.4 46 0.4 28 0.4 25 0.4 30 0.2 16 0.5 22 0.4 18 1.9 38 1.9 29 2.8 38 1.1 23 1.8 28 1.8 30 1.4 29 1.5 45 1.2 47 0.4 15 0.5 20 0.5 25
Patch-based Matting28.125.12831.30.2 33 0.2 25 0.2 20 0.2 21 0.3 42 0.3 37 0.4 22 0.4 26 0.4 28 0.3 22 0.5 27 0.6 43 1.2 15 1.5 14 2.2 15 1.3 30 2.1 34 1.9 34 1.2 19 1.2 20 0.9 30 0.6 39 0.6 36 0.6 43
KL-Divergence Based Sparse Sampling28.226.627.930.10.2 19 0.2 21 0.2 17 0.2 22 0.2 24 0.3 39 0.4 24 0.4 23 0.4 23 0.3 20 0.6 31 0.4 13 1.7 31 1.9 27 2.9 42 1.7 40 2.3 38 2.3 42 1.4 27 1.3 26 1 35 0.6 30 0.6 33 0.5 30
LNSP Matting28.926.429.530.80.2 20 0.3 30 0.2 11 0.2 18 0.2 18 0.3 35 0.4 23 0.5 38 0.4 26 0.3 19 0.5 24 0.6 41 1.8 35 1.9 30 2.7 37 1.2 26 1.6 26 2 38 1.4 36 1.3 27 0.9 23 0.6 34 0.8 43 0.6 35
Comprehensive sampling29.429.530.428.30.2 24 0.2 24 0.2 22 0.2 38 0.3 41 0.4 45 0.4 27 0.4 22 0.4 27 0.3 26 0.5 25 0.4 17 1.1 13 1.7 21 2.3 18 1.5 37 2.4 39 1.9 33 1.3 23 1.3 29 0.9 19 0.7 48 0.7 42 0.7 45
Three Stages Matting31.432.831.829.80.3 47 0.2 27 0.2 23 0.2 20 0.3 28 0.3 21 0.4 32 0.5 36 0.4 36 0.4 39 0.6 29 0.6 39 1.8 34 3.2 52 3 46 1 20 1.2 17 1.2 12 1.4 33 1.4 34 0.9 29 0.6 37 0.6 31 0.5 32
ATPM Matting31.532.636260.2 32 0.3 37 0.2 18 0.2 31 0.2 19 0.3 40 0.4 30 0.5 39 0.4 25 0.4 30 0.7 39 0.4 21 2.1 42 2.3 39 2.6 30 1.2 27 1.8 29 1.5 22 1.4 25 1.4 35 0.8 14 0.7 44 0.9 51 0.6 38
Sparse coded matting31.833.53229.90.3 49 0.4 46 0.3 50 0.3 43 0.3 37 0.3 34 0.4 43 0.5 32 0.4 41 0.3 27 0.5 23 0.4 14 1.4 22 1.7 24 2.3 21 1.1 21 1.6 23 1.3 18 1.5 43 1.6 52 1.1 45 0.5 20 0.5 19 0.4 16
SVR Matting32.334.934.527.60.3 50 0.4 53 0.3 41 0.3 49 0.3 36 0.3 29 0.4 31 0.5 37 0.4 24 0.4 32 0.6 35 0.5 26 1.5 24 2.1 34 2.5 26 1.2 28 1.6 25 1.5 24 1.3 20 1.2 19 0.8 15 0.7 45 0.7 37 0.6 36
CCM32.535.633.428.60.2 26 0.3 32 0.2 21 0.2 33 0.3 32 0.3 28 0.4 40 0.5 40 0.4 39 0.4 43 0.6 30 0.5 24 2.1 43 2.3 38 2.5 27 1.3 29 1.7 27 1.6 25 1.3 22 1.3 24 0.8 16 0.7 49 0.8 44 0.7 49
Segmentation-based matting32.636.831.629.40.2 28 0.3 29 0.2 26 0.2 29 0.2 20 0.3 13 0.4 36 0.5 45 0.4 34 0.4 33 0.6 28 0.5 27 2.1 44 1.7 23 2.5 28 1.9 43 2.2 36 2.5 45 2 60 1.7 55 1.2 48 0.5 21 0.5 17 0.4 14
Global Sampling Matting32.832.635.9300.2 14 0.3 38 0.2 19 0.2 27 0.3 29 0.3 24 0.4 33 0.5 41 0.4 32 0.4 38 0.8 42 0.6 42 2.1 45 2.1 36 2.7 33 2 45 2.8 47 2.6 46 1.4 31 1.3 25 0.9 22 0.5 28 0.6 29 0.5 22
Improved color matting33.335.535.628.90.2 29 0.3 31 0.2 30 0.2 35 0.3 35 0.3 16 0.4 35 0.5 44 0.4 38 0.5 46 0.7 41 0.5 36 2.5 49 2.5 45 2.7 35 1.9 42 2.5 42 2.4 43 1.4 30 1.4 32 0.9 18 0.4 18 0.4 15 0.4 15
Shared Matting33.533.435.931.30.2 22 0.3 33 0.2 27 0.3 53 0.6 53 0.5 54 0.4 26 0.4 31 0.4 31 0.4 35 0.8 43 0.5 23 1.6 29 2 33 2.3 19 1.4 31 1.9 30 1.8 29 1.5 39 1.5 41 1.1 46 0.6 32 0.6 23 0.4 21
Comprehensive Weighted Color and Texture34.433.338.631.30.4 55 0.4 55 0.5 56 0.4 55 0.5 49 0.5 49 0.3 21 0.4 19 0.4 21 0.3 25 0.6 32 0.4 15 1.1 10 1.8 26 2.4 22 1 19 1.4 21 1.2 15 1.7 57 1.8 57 1.2 53 0.5 24 0.9 50 0.4 19
CSC Matting34.837.826.340.30.3 40 0.2 23 0.3 47 0.3 42 0.3 30 0.6 55 0.5 47 0.4 29 0.5 48 0.5 48 0.6 33 0.7 52 1.6 28 1.7 19 2.6 29 1.5 33 1.6 24 2 37 1.4 37 1.3 28 0.9 26 0.5 27 0.6 24 0.5 28
TSPS-RV Matting35.440.328.937.10.2 23 0.2 26 0.2 12 0.2 39 0.2 23 0.3 33 0.5 46 0.4 27 0.4 45 0.3 21 0.5 26 0.7 51 2.9 55 2.2 37 2.9 40 2.4 49 2.2 37 2.9 51 1.6 54 1.2 23 1 38 0.6 35 0.6 32 0.5 27
Global Sampling Matting (filter version)38.53639.639.90.2 30 0.4 52 0.3 42 0.3 51 0.4 45 0.4 48 0.5 52 0.5 47 0.5 53 0.6 53 0.8 45 0.7 53 1.3 18 1.7 22 2.2 17 2 44 2.7 45 2.2 40 1.3 21 1.2 22 1.2 49 0.4 19 0.7 39 0.4 17
LocalSamplingAndKnnClassification38.739.839.4370.2 38 0.3 36 0.2 34 0.2 23 0.3 27 0.3 23 0.4 25 0.4 28 0.4 22 0.4 40 0.7 38 0.5 37 2.9 54 3.1 51 3.9 54 2.5 50 3.2 52 2.9 50 1.6 47 1.5 42 1 36 0.7 41 0.7 41 0.6 40
LNCLM matting39.741.640.936.60.2 31 0.2 22 0.3 38 0.3 48 0.4 44 0.3 32 0.5 54 0.6 56 0.5 51 0.5 45 0.7 37 0.6 38 2.1 46 2.6 47 2.9 39 1.5 35 2.4 40 2 35 1.6 45 1.6 47 0.9 21 0.6 29 0.6 34 0.6 39
Weighted Color and Texture Matting40.438.940.142.10.2 37 0.3 39 0.2 33 0.3 50 0.4 46 0.5 51 0.4 29 0.4 21 0.4 33 0.5 47 1.1 51 0.7 54 1.9 39 2.4 41 3.3 50 1.5 36 2 33 1.9 32 1.4 35 1.4 38 1.1 43 0.6 38 0.9 52 0.6 41
SPS matting40.739.543.838.90.2 35 0.3 44 0.3 37 0.4 56 0.7 56 0.5 50 0.5 48 0.5 49 0.5 52 0.6 55 1.4 56 0.7 49 1.3 20 2 32 2.5 24 2.1 47 2.7 46 2.1 39 1 15 1.2 18 0.8 12 0.6 40 0.8 49 0.7 48
Iterative Transductive Matting41.342.940.840.30.3 43 0.4 47 0.3 39 0.2 40 0.6 52 0.5 53 0.5 56 0.5 33 0.4 46 0.3 28 1.1 50 0.5 35 2 41 2.1 35 3 45 1.8 41 2.5 43 2.3 41 1.6 52 1.4 31 1 34 0.7 42 0.6 35 0.5 29
Improving Sampling Criterion42.5434341.40.3 42 0.4 45 0.3 45 0.3 52 0.4 47 0.4 41 0.5 51 0.5 52 0.5 54 0.9 59 1.4 57 0.9 57 2.2 47 2.7 48 2.9 41 2.6 51 3.2 51 2.6 47 1.1 17 1.1 16 0.9 20 0.5 25 0.6 28 0.5 26
SRLO Matting42.642.945.439.50.3 53 0.4 49 0.3 52 0.3 54 0.6 54 0.6 56 0.5 50 0.5 34 0.4 35 0.4 42 1.2 52 0.5 28 1.2 16 1.9 31 2.6 31 1.4 32 2.5 44 1.8 28 1.6 49 1.9 59 1 39 0.7 47 0.7 40 0.7 47
Learning Based Matting43.341.545.143.10.3 46 0.3 41 0.3 48 0.2 30 0.3 31 0.3 22 0.4 42 0.5 50 0.4 44 0.4 36 0.6 34 0.5 34 1.9 37 2.5 44 3.2 49 3.1 58 3.6 57 3.9 58 1.4 28 1.6 49 1 33 0.9 55 1.1 55 1.2 57
LMSPIR43.542.344.144.10.3 52 0.4 50 0.3 51 0.3 47 0.7 55 0.5 52 0.4 45 0.5 35 0.4 43 0.4 34 1.2 53 0.5 32 1.5 26 2.5 43 3.2 48 1.6 38 2.4 41 1.9 31 1.6 50 1.6 46 1.2 52 0.7 46 0.6 30 0.6 44
Closed-Form Matting44.144.144.843.40.3 41 0.3 40 0.3 44 0.2 25 0.3 34 0.3 27 0.4 38 0.5 48 0.4 40 0.4 41 0.6 36 0.6 40 3.3 57 3.6 56 4.6 56 2.9 57 3.5 55 3.7 57 1.5 44 1.5 43 0.9 27 0.7 50 0.8 46 1.2 56
Local Spline Regression (LSR)44.245.445.1420.2 36 0.3 34 0.3 36 0.2 28 0.3 39 0.3 31 0.4 41 0.5 42 0.4 37 0.4 37 0.7 40 0.5 33 3.4 58 3.5 55 4.5 55 2.9 54 3 49 3.2 52 1.6 55 1.7 54 1 40 0.8 54 0.8 48 0.9 52
KNN Matting44.347.544.640.90.3 48 0.3 42 0.3 40 0.3 44 0.3 38 0.3 36 0.6 59 0.6 55 0.6 59 0.5 50 1 47 0.6 44 2.8 52 2.8 49 3 44 1.5 34 1.9 31 1.6 26 1.5 41 1.5 39 0.9 25 0.8 52 1.2 56 0.9 53
Robust Matting45.34245.648.30.3 44 0.4 48 0.3 49 0.5 57 0.9 57 0.6 57 0.4 39 0.5 43 0.5 49 0.5 49 0.8 44 0.7 48 1.8 36 2.6 46 3.1 47 2 46 3.1 50 2.7 48 1.4 32 1.6 50 1.2 55 0.6 33 0.6 27 0.5 33
Large Kernel Matting46.346.547.3450.3 45 0.3 43 0.3 46 0.2 34 0.3 40 0.2 12 0.5 49 0.6 54 0.5 50 0.5 51 1.3 54 0.7 50 2.9 53 3.3 54 3.7 51 2.6 53 3.3 53 3.4 56 1.4 34 1.4 33 1.1 44 0.8 53 0.8 47 0.8 51
High-res matting46.944.550.845.40.2 39 0.3 35 0.3 43 0.2 41 0.5 50 0.4 43 0.4 37 0.5 46 0.4 42 0.4 44 1.3 55 0.5 31 2.3 48 2.9 50 3.7 53 2.6 52 3.8 58 3.3 55 1.8 59 1.8 58 1.2 54 0.6 36 1.1 54 0.6 42
Shared Matting (Real Time)48.548.948.148.40.3 54 0.5 57 0.4 55 0.6 58 0.9 58 0.7 58 0.4 44 0.5 51 0.4 47 0.6 54 1.1 49 0.6 45 2 40 2.5 42 2.9 43 1.7 39 2.1 35 2 36 1.6 51 1.6 48 1.3 57 0.8 51 0.8 45 0.7 46
Cell-based matting Laplacian515251.1500.3 51 0.4 51 0.3 53 0.3 46 0.6 51 0.3 38 0.6 57 0.6 57 0.6 57 0.6 52 0.9 46 0.7 55 2.7 51 3.2 53 3.7 52 2.9 55 3.4 54 3.2 54 1.6 48 1.5 44 1 37 0.9 56 1 53 0.9 54
Transfusive Weights54.252.355.554.80.5 58 0.5 59 0.5 58 0.2 37 0.4 43 0.3 26 0.5 55 0.6 58 0.6 58 0.9 58 1.5 60 1 58 4.9 63 5.8 61 7 63 4.5 63 5.6 63 5.3 63 1.3 24 1.5 40 1.2 51 1.5 60 1.6 60 1.8 61
Random Walk Matting55.556.455.354.80.4 56 0.5 56 0.4 54 0.3 45 0.4 48 0.3 30 0.5 53 0.6 53 0.5 56 0.7 56 1 48 0.8 56 4.8 62 6.4 63 6.7 62 4.4 62 5 62 4.7 62