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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
SIM2.832.13.48.3 1 8.7 1 9 1 4.8 11 4.8 8 6 10 2.2 1 2.2 1 2 1 0.9 5 0.9 2 1.1 1 4.7 2 5.1 1 6.3 2 2.2 1 2.3 1 2.5 1 15.9 1 16.3 1 16.3 5 17.8 2 18 2 20.9 6
IamAlpha5.64.94.87.310.4 14 10.5 9 10.8 11 4.4 3 4.4 1 6.1 11 2.7 2 3 4 3.2 11 0.9 3 1.7 11 1.7 6 4.8 4 5.2 2 6.2 1 2.5 8 3.3 8 3.3 4 16.2 2 16.9 2 17.9 13 17.8 3 18 1 18 1
PIIAMatting5.73.17.56.59.1 5 10 7 9.3 3 4.3 2 4.6 3 5.4 4 2.8 4 3.7 12 2.7 5 0.9 2 2.3 17 2 12 4.7 3 6.8 8 8.3 8 2.2 3 2.7 4 4.3 14 17.2 5 17.3 5 15.5 1 16.6 1 19.1 4 20.2 5
HDMatt6.98.85.46.59.5 7 10 5 10.7 10 4.7 7 4.8 6 5.8 8 2.9 7 3 3 2.6 2 1.1 11 1.2 8 1.3 3 5.2 8 5.9 3 6.7 3 2.4 4 2.6 2 3.1 2 17.3 7 17.3 3 17 9 21.5 19 22.4 13 23.2 15
Non-Local Matting with Refinement8.897.99.610.2 11 11 11 11.5 16 4.4 4 4.6 2 5 2 3.3 9 3.3 5 2.6 3 1 7 1 3 1.2 2 5 5 6.2 5 7.3 4 2.4 5 2.8 5 3.4 5 18.2 10 20 18 19 19 21.8 21 22.5 14 25.3 26
AdaMatting97.9811.110.2 12 11.1 14 10.8 12 4.9 13 5.4 12 6.6 15 3.6 14 3.4 8 3.4 17 0.9 1 0.9 1 1.8 7 4.7 1 6.8 6 9.3 16 2.2 2 2.6 3 3.3 3 19.2 16 19.8 17 18.7 17 17.8 4 19.1 3 18.6 2
Background Matting9.26.96.913.89.3 6 10 6 10.1 7 4.5 6 5.1 10 6.7 16 2.9 6 3.3 6 2.9 7 1 9 1.2 7 2.2 18 5.2 7 6 4 7.8 6 2.8 11 3.4 10 4.3 13 16.4 3 17.3 4 16.4 6 19.5 7 20.9 8 27.9 37
SampleNet Matting9.57.58.9129.1 4 9.7 4 9.8 6 4.3 1 4.8 5 5.1 3 3.4 13 3.7 13 3.2 14 0.9 4 1.1 5 2 10 5.1 6 6.8 7 9.7 19 2.5 7 4 14 3.7 7 18.6 15 19.3 14 19.1 21 20 10 21.6 9 23.2 16
GCA Matting10.611.67.612.58.8 2 9.5 3 11.1 14 4.9 12 4.8 7 5.8 9 3.4 12 3.7 10 3.2 13 1.1 14 1.2 6 1.3 4 5.7 15 6.9 9 7.6 5 2.8 10 3.1 6 4.5 17 18.3 12 19.2 10 18.5 15 20.8 16 21.7 10 24.7 23
FE2E High-Quality Matting11.310.112.511.310.1 10 11.1 12 9.3 4 5.5 18 6.4 16 6.9 18 3.4 11 3.7 11 3.2 12 1 8 1.7 12 1.9 8 5.7 14 7.8 18 11 24 2.5 6 3.8 12 3.8 8 17.3 6 18.4 8 17.4 12 19.6 8 21.8 11 20.2 4
ATNet Matting1213.510.511.99.7 9 10.2 8 9.6 5 4.5 5 4.8 4 4.4 1 3.7 15 3.9 14 3.4 18 1.7 24 1.9 14 2.2 16 5.9 20 7 11 9.3 15 2.9 12 3.3 9 3.9 10 19.8 18 20.6 19 20.7 27 19 5 19.2 5 20.1 3
VDRN Matting1213.91210.18.9 3 9.4 2 9.3 2 5.2 15 5.6 14 6.6 14 2.8 5 3.3 7 2.7 4 1.8 27 1.9 15 2 9 5.7 13 7.1 12 8.3 7 3 13 3.5 11 3.6 6 17.6 8 18.3 7 16.9 8 23.2 27 25.9 28 26.5 31
Deep Matting12.41411.511.610.7 16 11.2 16 11 13 4.8 10 5.8 15 5.6 6 2.8 3 2.9 2 2.9 6 1.1 10 1.1 4 2 11 6 25 7.1 13 8.9 11 2.7 9 3.2 7 3.9 9 19.2 17 19.6 16 18.7 16 21.8 22 23.9 19 24.1 21
Information-flow matting14.81615.412.910.3 13 11.2 15 12.5 18 5.6 22 7.3 20 7.3 21 3.8 16 4.1 16 3 9 1.4 15 2.3 16 2 14 5.9 22 7.1 14 8.6 9 3.6 17 5.7 17 4.6 18 18.3 11 19.3 13 15.8 3 20.2 12 22.2 12 22.3 11
IndexNet Matting15.818.514.514.412.6 32 13.4 18 11.4 15 4.8 9 4.9 9 5.7 7 3.3 10 4 15 3 8 1.1 12 1.5 10 1.6 5 6.4 29 7.5 17 8.9 12 3.4 14 4 13 4.1 11 18.6 14 19.1 9 18.5 14 23.4 28 25.1 25 29.3 43
DCNN Matting16.918.814.91712 26 14.1 20 14.5 24 5.3 16 6.4 17 6.8 17 3.9 18 4.5 18 3.4 16 1.6 21 2.5 18 2.2 19 6 24 6.9 10 9.1 13 4 20 6 18 5.3 20 19.9 19 19.2 12 19.1 20 19.4 6 20 6 21.2 7
AlphaGAN17.318.317.616.19.6 8 10.7 10 10.4 9 4.7 8 5.3 11 5.4 5 3.1 8 3.7 9 3.1 10 1.1 13 1.3 9 2 13 6.4 31 8.3 26 9.3 17 3.6 16 5 15 4.3 15 20.8 20 21.5 21 20.6 26 25.7 42 28.7 40 26.7 34
Context-aware Matting19.823.917.917.610.4 15 11.1 13 10.1 8 6.4 32 7.4 23 7.1 19 4.1 19 4.5 19 3.8 24 2.3 42 3.1 20 3 35 7.1 38 8.2 24 9.1 14 3.5 15 5.5 16 4.1 12 18.3 13 19.2 11 16.5 7 21.1 17 23.3 17 24.6 22
Three-layer graph matting2217.919.828.410.7 17 15.2 21 13.8 21 4.9 14 5.6 13 8.1 33 3.9 17 4.4 17 3.6 21 1 6 1.8 13 3 33 5.9 19 7.3 16 12.4 33 4.2 23 8 25 8.5 42 24.2 34 25.6 35 24.2 35 20.5 13 23.5 18 22.2 9
ATPM Matting24.327.626.818.514 43 17.8 28 13.4 19 5.5 17 6.4 18 7.3 22 5.4 50 6.4 45 4.3 38 1.7 25 3.3 25 2.3 22 6.8 35 8 21 8.7 10 4.2 21 7.5 22 5.5 21 17.2 4 17.6 6 15.7 2 22.6 26 37.3 49 22.8 14
Three Stages Matting25.42525.525.811.7 25 13.9 19 13.9 22 5.6 19 7.4 22 7.9 27 4.6 31 5.5 32 4.2 33 2.2 38 4 32 3.1 38 6.5 32 11 43 11.9 28 4 18 6.5 19 4.5 16 23.3 28 23.2 30 22.3 30 19.6 9 20.8 7 22.4 12
CSC Matting26.930.423.127.313.6 40 15.6 22 14.5 23 6.2 30 7.5 24 8.1 34 4.6 32 4.8 21 4.2 36 1.8 29 2.7 19 2.5 24 5.5 12 7.3 15 9.7 18 4.6 27 7.6 23 6.9 30 23.7 30 23 28 21 28 26.3 43 27.2 33 25.2 25
LNSP Matting2723.427.53012.2 27 22.5 46 19.5 51 5.6 20 8.1 26 8.8 43 4.6 29 5.9 37 3.6 20 1.5 18 3.5 28 3.1 37 6.2 26 8.1 23 10.7 23 4 19 7.1 20 6.4 26 21.5 23 20.8 20 16.3 4 22.5 25 24.4 20 27.8 36
Graph-based sparse matting2828.528.826.612.6 33 20.5 38 14.8 28 5.7 24 7.3 19 6.4 13 4.5 27 5.3 28 3.7 22 1.4 17 3.3 26 2.3 21 6.3 28 7.9 19 11.1 25 4.2 22 8.3 28 6.4 25 28.7 47 31.3 48 27.1 44 23.6 30 25.1 24 27.3 35
KL-Divergence Based Sparse Sampling28.226.528.329.811.6 24 17.5 27 14.7 25 5.6 21 8.5 31 8 29 4.9 43 5.3 26 3.7 23 1.5 19 3.5 27 2.1 15 5.8 17 8.3 25 14.1 41 5.6 38 9.3 33 8 38 24.6 35 27.7 42 28.9 47 20.7 15 22.7 15 23.9 20
Patch-based Matting28.322.430.531.910.9 19 19 32 15.7 34 6 27 9.5 40 8.3 36 4.3 23 5.2 25 4.2 35 1.6 20 3.2 23 2.6 25 5.2 9 9 31 12.4 30 4.7 28 9.7 35 7 31 21.6 24 21.7 22 24.9 37 23.5 29 28.1 36 25.6 27
TSPS-RV Matting29.527.629.531.511.3 23 16.4 25 13.7 20 6.1 28 8.1 28 8.6 40 4.5 25 5.4 30 4.1 32 1.4 16 3.3 24 3.5 47 7.9 46 8.9 29 12.4 32 6.2 42 9 31 8.7 44 22.8 27 23.5 31 21.4 29 20.7 14 28.5 38 22.2 8
Iterative Transductive Matting30.331.330.52913.1 37 17.2 26 15.6 33 5.7 23 8.6 33 7.8 26 5.1 46 5.5 31 3.9 25 1.9 30 5.8 43 2.6 26 6.6 33 8.5 27 13.8 40 5.4 33 10 36 7.4 35 25.5 37 24 32 23.8 34 20.1 11 22.7 16 22.7 13
SVR Matting30.833.631.327.418.7 55 30.7 57 19.1 48 6.8 42 7.7 25 7.6 25 4.7 38 5 24 3.4 15 1.9 31 4.7 35 2.9 31 5.8 16 8.7 28 10.5 20 4.3 24 8 26 5.6 23 21.2 22 22.1 25 17.1 11 25.6 41 26.1 30 30.6 46
Comprehensive sampling30.827.431.333.611.2 22 18.5 31 14.8 26 6.5 36 9.5 39 8.9 45 4.5 26 4.9 22 4.1 31 1.7 23 3.1 22 2.3 23 5.4 11 9.8 35 13.4 38 5.5 36 11.5 42 7.4 37 23.9 32 22 24 22.8 31 23.8 33 28 35 28.1 38
Comprehensive Weighted Color and Texture31.330.632.630.614.6 44 16 23 15.7 35 6.8 41 10 43 7.9 28 4.3 22 5 23 4.1 29 1.7 22 3.5 29 2.2 17 5.4 10 9.9 37 12.8 36 4.3 25 7.4 21 5.2 19 28.3 46 28.1 43 25.4 40 24 35 30.2 42 28.7 41
Sparse coded matting31.83532.627.613.7 41 25.8 53 14.8 29 6.4 33 8.2 29 6.2 12 4.7 33 5.4 29 4 27 1.8 28 3.1 21 2.3 20 5.9 21 8 22 10.6 21 4.5 26 8 24 5.5 22 30.3 49 33.1 51 29.2 48 27.7 49 27.2 32 29 42
LocalSamplingAndKnnClassification33.335.931.432.812.6 31 16 24 12.4 17 5.8 25 8.1 27 8 30 4.5 28 5.5 33 4.1 28 2.2 39 5.1 38 3.4 45 8.1 47 10.5 39 15.6 46 7.3 46 12.3 45 9.4 45 24.1 33 21.8 23 19.7 22 24.7 38 24.8 22 25.9 29
Weighted Color and Texture Matting3431.536.334.313.1 38 17.8 29 15.8 36 6.5 35 9.4 37 8.6 39 4.2 21 4.7 20 3.9 26 1.7 26 6 44 2.7 27 6.4 30 11 42 16.3 47 4.8 29 9.1 32 6.5 27 23.7 29 24.8 34 23.2 32 26.5 44 40.2 52 28.5 40
CCM34.337.434.331.413.8 42 20.8 39 16.9 44 6.4 34 8.9 35 8.2 35 4.7 34 5.9 38 3.6 19 2.5 44 4.3 33 3 32 7 37 9 30 10.6 22 4.9 30 8.1 27 5.7 24 25.6 38 27.5 41 24.5 36 25.4 40 26.4 31 28.2 39
LNCLM matting34.436.834.332.110.9 20 11.2 17 16.7 42 6.9 44 8.9 36 7.2 20 5.6 52 7 53 4.1 30 2.5 46 5.1 39 3.5 48 7.5 41 10 38 12 29 5.5 37 11.3 39 7.3 34 25.2 36 23 29 19.9 24 21.2 18 25 23 26.4 30
Shared Matting34.532.638.132.610.8 18 20.5 37 15 30 7.8 48 11.6 49 8.1 31 4.2 20 5.3 27 4.2 34 2.1 33 5.8 42 2.9 30 5.9 23 9.2 32 11.4 27 5 31 8.8 29 6.8 29 34.9 54 34.9 52 34.3 52 23.9 34 28.4 37 25.7 28
Global Sampling Matting36.833.539.637.410.9 21 22.7 47 15.4 31 6.3 31 9.5 41 9 46 4.7 35 6.4 47 4.3 40 2.2 40 5.6 41 3.4 44 6.9 36 9.6 34 12.9 37 6.3 43 12.5 46 8.6 43 25.8 39 27.5 40 25.3 39 22 23 24.4 21 23.7 19
SRLO Matting37.836.340.436.614.7 45 18 30 17.7 46 6.9 43 10.7 45 8.9 44 4.9 44 5.7 35 4.7 48 2.1 35 6.5 45 2.8 29 6.3 27 10.9 41 15.2 45 5.4 32 11.6 43 7 33 26.5 44 29.7 45 25.1 38 21.7 20 28.5 39 22.3 10
Segmentation-based matting38.138.937.338.312.8 36 23.5 49 16.6 41 6.6 37 8.3 30 7.3 23 4.8 42 6.1 41 4.3 41 2.1 34 3.9 31 3.1 36 6.7 34 8 20 13.4 39 6 41 8.8 30 8.2 39 31.6 50 35.6 53 38.8 54 24.5 37 32 44 26.7 33
Improved color matting39.339.538.639.814.9 46 24.5 51 20 52 6.7 39 9.5 38 8.5 38 4.6 30 6.1 42 4.3 42 2.6 48 5.4 40 3.4 46 7.5 42 9.9 36 12.5 34 6 39 10.1 37 8.4 41 26.1 40 26.7 39 23.6 33 23.8 32 25.6 26 26.7 32
KNN Matting39.641.541.33616.2 50 19.7 33 16.8 43 8 49 11 46 9 48 4.7 36 6.7 50 4.3 37 3 51 7.7 51 3.7 49 9.2 50 11.3 44 11.3 26 6 40 10.4 38 6.7 28 18.1 9 19.6 15 17 10 27.4 47 41 53 32.7 47
Local Spline Regression (LSR)39.741.936.440.912.2 28 20 35 16.2 37 6.1 29 8.8 34 8.1 32 5.2 48 6.2 44 4.6 45 2.2 41 4.9 37 3.1 39 9.4 52 11.9 46 18.3 50 8.2 49 11.4 40 10.1 47 26.4 42 22.5 26 20.2 25 27 46 26 29 39.8 52
Global Sampling Matting (filter version)39.937.642.639.412.3 29 24.3 50 16.3 38 7.3 46 10.2 44 9.5 49 5.1 47 6.4 46 4.7 49 2.4 43 4.7 36 3.2 41 5.9 18 9.5 33 12.4 31 6.5 44 13.1 47 8.3 40 26.5 43 28.3 44 30 50 23.6 31 29.1 41 23.5 17
Learning Based Matting41.141.640.341.416 49 22 45 18.7 47 6.6 38 7.4 21 7.4 24 4.8 40 6.1 40 4.3 43 2.1 32 3.7 30 2.8 28 7.5 43 14.5 52 19.5 53 8.6 53 14.1 50 14.6 55 22.5 25 24.8 33 19.9 23 34.6 53 38.5 51 51.2 58
LMSPIR42.141.143.941.415.2 48 20 34 19.1 49 6.7 40 11.2 47 8.7 42 4.8 41 5.8 36 4.6 47 2.1 36 6.8 48 3 34 7.9 45 14.3 51 20.2 54 5.5 35 11.4 41 7 32 29.7 48 31 47 29.6 49 24 36 34.2 47 25 24
Shared Matting (Real Time)42.641.343.54312.4 30 21.6 41 16.3 39 9.5 52 13.5 51 9.9 50 4.4 24 5.6 34 4.4 44 2.5 47 6.8 49 3.2 42 7.1 39 10.8 40 12.6 35 5.4 34 9.7 34 7.4 36 35.5 56 35.8 54 35.5 53 27.6 48 33.4 45 29.8 45
Closed-Form Matting4341.640.646.912.7 34 21.9 44 17.2 45 5.9 26 8.5 32 8.6 41 4.7 37 6 39 4.3 39 2.2 37 4.6 34 3.3 43 9.3 51 12.1 47 19.3 52 8.3 50 14.9 52 13.4 54 34.2 53 32.4 50 27.4 45 26.5 45 25.7 27 48.3 56
Improving Sampling Criterion46.745.948.545.812.7 35 21.1 40 16.4 40 11.5 55 17 56 12.1 55 5.8 54 8.1 56 5.7 54 5.4 59 12.1 58 6.6 58 9.6 54 15.7 53 17.8 48 10.2 55 17 53 11.2 52 23.8 31 26.7 38 25.9 41 22.2 24 27.3 34 23.7 18
Cell-based matting Laplacian47.349.44646.415.1 47 21.7 42 15.6 32 7.6 47 11.4 48 9 47 5.7 53 6.7 51 5.2 52 3.1 52 6.7 46 4.5 52 8.6 48 11.4 45 14.9 43 8.5 52 13.5 49 11.1 50 27.7 45 26.2 37 27.6 46 32.4 51 37.6 50 37.9 49
Large Kernel Matting47.549.146.946.517.2 51 21.8 43 20.7 53 7.2 45 9.6 42 8.4 37 5.3 49 6.6 49 4.6 46 2.9 50 8.2 53 4.2 50 8.6 49 12.1 48 14.7 42 8 48 13.4 48 11.2 51 33 51 31.8 49 26.1 42 32.1 50 32 43 38.4 51
Robust Matting48.244.549.15117.3 52 28.4 55 21.1 54 10.1 53 16.9 55 11.4 53 4.8 39 6.5 48 5 51 2.8 49 7.3 50 4.4 51 7.3 40 14 50 18.1 49 6.8 45 14.6 51 10.6 49 22.7 26 26.1 36 32.1 51 34.4 52 37 48 38 50
SPS matting50.349.653.347.913.4 39 23 48 14.8 27 12.5 56 18.5 57 12.4 56 6.6 58 9.4 59 6.5 59 4.5 57 12.7 59 5.4 55 9.5 53 16.4 55 18.6 51 9.8 54 18.1 56 10.6 48 26.1 41 30.9 46 26.2 43 25 39 33.5 46 29.5 44
High-res matting51.249.852.551.418.6 54 25.8 52 24.6 56 8.6 50 14.1 52 11.1 52 5 45 6.2 43 4.8 50 2.5 45 8.3 54 3.2 40 7.8 44 14 49 21.4 55 8.5 51 18.1 57 12.2 53 35.3 55 38.1 56 42.6 57 38.7 54 54.6 57 36.8 48
Transfusive Weights51.751.851.551.823.2 56 26.7 54 22.4 55 9.2 51 11.9 50 10.4 51 6.1 56 8.1 55 5.9 56 3.8 55 8 52 5.3 54 12.9 57 21.4 57 37.6 61 13.1 60 22.8 59 18.3 60 20.9 21 22.9 27 19 18 59.5 58 65.7 58 72.8 59
Random Walk Matting54.956.552.555.817.9 53 20.3 36 19.4 50 11.3 54 15.6 53 11.8 54 5.8 55 7 52 6.3 58 3.4 53 6.7 47 4.6 53 13.1 59 22.1 58 27.4 57 12.3 59 18 55 15.7 58 44.1 60 43.5 59 41 56 75.1 59 81.8 60 80.6 60
Geodesic Matting56.15755.955.526.9 59 38.5 60 32.5 59 14.2 57 16.5 54 17.4 58 11.7 61 14 62 9.4 61 7.6 61 15.1 60 8.7 61 12.8 56 16.7 56 15.1 44 7.3 47 12.1 44 9.8 46 37.3 58 37.4 55 42.8 58 48.6 57 50 56 48.6 57
Iterative BP Matting57.256.557.15823.6 57 29.9 56 27.2 57 16.7 58 24.3 59 20.7 61 6.7 59 9 57 6.3 57 3.8 54 11.3 56 6.8 60 14.1 60 22.8 59 27.9 58