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
TransMatting3.23.6330.1 4 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 3 0.1 3 0.2 2 0.8 4 0.9 3 1.3 2 0.3 4 0.4 3 0.5 2 0.6 8 0.6 8 0.6 8 0.2 1 0.2 3 0.3 4
LFPNet3.33.13.13.80.1 1 0.1 3 0.1 2 0.1 4 0.1 3 0.2 6 0.1 4 0.1 4 0.1 2 0.1 4 0.1 2 0.3 7 0.7 1 0.7 1 1.1 1 0.3 2 0.3 2 0.5 1 0.4 1 0.5 3 0.6 5 0.2 8 0.3 7 0.3 6
S²Matt3.83.53.64.10.1 3 0.1 4 0.1 3 0.1 3 0.1 4 0.2 5 0.1 8 0.2 9 0.1 3 0.1 2 0.1 1 0.3 5 0.7 2 0.7 2 1.3 3 0.3 1 0.3 1 0.5 4 0.4 4 0.5 4 0.6 7 0.2 5 0.3 4 0.3 3
TMFNet4.53.34.65.80.1 2 0.1 2 0.2 6 0.1 1 0.1 9 0.2 10 0.1 1 0.1 1 0.2 8 0.1 1 0.1 4 0.3 4 0.7 3 0.9 4 1.5 7 0.3 3 0.4 5 0.7 6 0.5 6 0.6 7 0.5 3 0.3 9 0.3 5 0.2 2
IamAlpha5.77.65.93.60.1 5 0.1 5 0.1 4 0.1 6 0.1 2 0.1 1 0.2 14 0.2 10 0.2 7 0.2 10 0.2 8 0.2 1 0.9 5 1 6 1.4 6 0.6 14 0.7 10 0.9 8 0.5 5 0.5 5 0.5 1 0.2 2 0.2 1 0.2 1
SIM7.18.95.86.60.2 9 0.2 10 0.2 7 0.1 18 0.1 10 0.3 20 0.2 11 0.1 5 0.2 4 0.2 9 0.1 6 0.3 6 1 8 1 5 1.4 4 0.5 8 0.5 6 0.7 5 0.4 2 0.5 2 0.5 2 0.2 6 0.2 2 0.3 5
TIMI-Net7.18.37.55.60.2 10 0.2 9 0.2 8 0.1 15 0.1 13 0.1 3 0.1 7 0.1 6 0.2 5 0.2 12 0.1 7 0.3 8 1.1 10 1 7 1.4 5 0.3 5 0.4 4 0.5 3 0.4 3 0.5 1 0.6 6 0.2 4 0.4 13 0.3 7
HDMatt9.910.98.310.60.2 19 0.2 8 0.2 26 0.1 12 0.1 12 0.3 19 0.1 2 0.1 3 0.2 6 0.2 14 0.2 11 0.3 3 1.1 13 1.2 9 1.6 8 0.6 9 0.6 8 0.9 9 0.5 7 0.5 6 0.6 4 0.3 11 0.4 9 0.4 10
Background Matting13911.518.40.2 11 0.2 15 0.2 16 0.1 10 0.2 20 0.3 25 0.1 5 0.2 11 0.2 11 0.2 11 0.2 9 0.5 35 0.9 7 1.1 8 1.7 9 0.6 11 0.8 12 1.2 16 0.6 10 0.7 11 0.8 17 0.2 7 0.3 6 0.4 18
A2U Matting1312.39.617.30.2 18 0.2 14 0.2 38 0.1 9 0.1 6 0.2 12 0.1 10 0.2 8 0.2 10 0.2 13 0.2 10 0.4 12 1.1 11 1.3 11 1.9 11 0.6 13 0.7 11 1.7 30 0.6 11 0.6 9 0.6 11 0.3 13 0.3 8 0.4 14
PIIAMatting13.5914.317.30.1 7 0.2 16 0.2 11 0.1 8 0.1 5 0.2 11 0.1 6 0.2 16 0.2 17 0.1 6 0.4 24 0.6 50 0.9 6 1.5 15 1.9 14 0.4 7 0.7 9 1.2 17 1.4 29 0.7 12 0.6 9 0.2 3 0.4 17 0.3 9
AdaMatting14.110.311.820.40.2 15 0.2 17 0.2 34 0.1 5 0.1 7 0.4 45 0.2 17 0.2 14 0.2 14 0.1 5 0.1 5 0.3 10 1.1 9 1.4 12 2.3 22 0.4 6 0.6 7 0.9 7 0.9 15 1 16 0.9 19 0.3 10 0.4 16 0.4 12
GCA Matting14.814.913.4160.1 8 0.1 6 0.2 14 0.1 17 0.1 15 0.3 21 0.2 16 0.2 18 0.2 18 0.2 18 0.2 13 0.3 9 1.3 19 1.6 20 1.9 12 0.7 15 0.8 13 1.4 23 0.6 9 0.7 10 0.6 10 0.4 17 0.4 12 0.4 21
Context-aware Matting15.917.416.813.50.2 12 0.2 13 0.2 5 0.1 13 0.2 17 0.2 9 0.2 19 0.2 19 0.2 12 0.2 21 0.4 21 0.4 22 1.4 24 1.5 13 1.8 10 0.8 17 1.3 21 1 10 1.1 19 1.1 20 0.9 27 0.4 14 0.4 10 0.4 13
SampleNet Matting1611.81422.40.1 6 0.1 7 0.2 33 0.1 7 0.1 16 0.2 8 0.2 21 0.3 20 0.3 20 0.1 8 0.2 12 0.5 27 1.1 14 1.5 14 2.7 34 0.6 10 0.9 14 1 11 0.8 13 0.9 14 0.9 31 0.4 15 0.4 15 0.4 15
IndexNet Matting19.918.818.622.40.2 14 0.2 12 0.2 15 0.1 14 0.1 11 0.3 15 0.2 12 0.2 17 0.2 9 0.2 15 0.2 14 0.4 14 1.7 33 1.9 31 2.5 27 1 21 1.1 19 1.3 20 1.1 21 1.2 24 1.2 53 0.4 20 0.5 21 0.5 26
FE2E High-Quality Matting20.219.519220.2 38 0.2 23 0.2 36 0.2 25 0.2 25 0.3 31 0.2 13 0.2 15 0.2 13 0.2 16 0.3 17 0.3 11 1.3 20 1.8 29 2.8 40 0.6 12 0.9 15 1.2 13 0.9 16 1 17 0.9 24 0.4 16 0.4 11 0.3 8
ATNet Matting20.422.318.320.60.2 27 0.2 21 0.2 9 0.1 11 0.1 8 0.1 2 0.2 18 0.2 13 0.2 19 0.4 32 0.4 22 0.5 32 1.1 16 1.3 10 2.2 18 0.9 19 1.1 18 1.2 15 1.5 43 1.4 40 1.2 59 0.3 12 0.4 14 0.4 11
VDRN Matting20.923.318.520.90.2 17 0.2 11 0.2 10 0.1 16 0.1 14 0.3 27 0.2 15 0.2 12 0.2 16 0.4 34 0.3 19 0.5 24 1.4 26 1.6 19 1.9 13 0.8 18 0.9 17 1.1 12 0.9 14 0.9 15 0.7 12 0.7 46 0.7 41 0.7 53
AlphaGAN2524.122.927.90.2 29 0.2 19 0.2 30 0.2 21 0.2 18 0.3 16 0.2 20 0.3 21 0.3 21 0.2 17 0.2 15 0.4 18 1.8 36 2.4 43 2.7 38 1.1 27 1.4 25 1.5 26 0.9 17 1.1 18 1 34 0.5 26 0.5 24 0.6 40
Deep Matting2522.121.831.30.4 60 0.4 57 0.5 60 0.2 19 0.2 28 0.2 7 0.1 9 0.1 7 0.2 15 0.2 20 0.2 16 0.6 49 1.3 22 1.5 18 2.4 25 0.8 16 0.9 16 1.3 22 0.7 12 0.8 13 1.1 45 0.4 19 0.5 19 0.5 27
DCNN Matting26.329.926.422.80.2 23 0.2 20 0.2 18 0.2 35 0.3 36 0.3 18 0.3 23 0.4 27 0.3 22 0.3 26 0.4 20 0.4 13 1.5 28 1.5 17 2.1 15 1.1 25 1.3 23 1.5 24 1.5 45 1.4 39 1 35 0.6 34 0.6 29 0.5 37
Information-flow matting283126.626.30.2 20 0.2 18 0.2 27 0.2 39 0.2 29 0.4 47 0.4 37 0.4 33 0.4 32 0.3 27 0.4 23 0.4 21 1.7 35 1.8 27 2.2 16 0.9 20 1.3 22 1.3 19 1.5 41 1.4 33 0.8 14 0.5 29 0.6 28 0.5 34
Three-layer graph matting3026.32835.60.2 13 0.2 22 0.2 31 0.2 29 0.2 23 0.4 50 0.3 22 0.4 23 0.3 23 0.1 7 0.3 18 0.5 31 1.6 30 1.7 22 2.7 36 1.1 28 1.9 35 2.4 47 1.6 56 1.6 56 1 44 0.5 25 0.6 25 0.4 23
Patch-based Matting30.927.830.9340.2 35 0.2 28 0.2 22 0.2 23 0.3 45 0.3 40 0.4 25 0.4 29 0.4 31 0.3 25 0.5 30 0.6 46 1.2 17 1.5 16 2.2 17 1.3 33 2.1 37 1.9 37 1.2 22 1.2 23 0.9 33 0.6 42 0.6 39 0.6 46
Graph-based sparse matting3128.830.333.90.2 36 0.3 31 0.2 17 0.2 27 0.2 24 0.4 49 0.4 31 0.4 28 0.4 33 0.2 19 0.5 25 0.4 20 1.9 41 1.9 32 2.8 41 1.1 26 1.8 31 1.8 33 1.4 32 1.5 48 1.2 50 0.4 18 0.5 23 0.5 28
KL-Divergence Based Sparse Sampling3129.430.932.90.2 21 0.2 24 0.2 19 0.2 24 0.2 27 0.3 42 0.4 27 0.4 26 0.4 26 0.3 23 0.6 34 0.4 15 1.7 34 1.9 30 2.9 45 1.7 43 2.3 41 2.3 45 1.4 30 1.3 29 1 38 0.6 33 0.6 36 0.5 33
LNSP Matting31.629.132.333.40.2 22 0.3 33 0.2 12 0.2 20 0.2 19 0.3 38 0.4 26 0.5 41 0.4 29 0.3 22 0.5 27 0.6 44 1.8 38 1.9 33 2.7 39 1.2 29 1.6 29 2 41 1.4 39 1.3 30 0.9 26 0.6 37 0.8 46 0.6 38
Comprehensive sampling32.132.333.330.80.2 26 0.2 27 0.2 24 0.2 41 0.3 44 0.4 48 0.4 30 0.4 25 0.4 30 0.3 29 0.5 28 0.4 19 1.1 15 1.7 23 2.3 20 1.5 40 2.4 42 1.9 36 1.3 26 1.3 32 0.9 21 0.7 51 0.7 45 0.7 48
Three Stages Matting34.235.634.832.30.3 50 0.2 30 0.2 25 0.2 22 0.3 31 0.3 22 0.4 35 0.5 39 0.4 39 0.4 42 0.6 32 0.6 42 1.8 37 3.2 55 3 49 1 23 1.2 20 1.2 14 1.4 36 1.4 37 0.9 32 0.6 40 0.6 34 0.5 35
ATPM Matting34.335.538.928.40.2 34 0.3 40 0.2 20 0.2 34 0.2 21 0.3 43 0.4 33 0.5 42 0.4 28 0.4 33 0.7 42 0.4 23 2.1 45 2.3 42 2.6 32 1.2 30 1.8 32 1.5 25 1.4 28 1.4 38 0.8 15 0.7 47 0.9 54 0.6 41
Sparse coded matting34.736.534.932.60.3 52 0.4 49 0.3 53 0.3 46 0.3 40 0.3 37 0.4 46 0.5 35 0.4 44 0.3 30 0.5 26 0.4 16 1.4 25 1.7 26 2.3 23 1.1 24 1.6 26 1.3 21 1.5 46 1.6 55 1.1 48 0.5 23 0.5 22 0.4 19
SVR Matting35.237.937.530.10.3 53 0.4 56 0.3 44 0.3 52 0.3 39 0.3 32 0.4 34 0.5 40 0.4 27 0.4 35 0.6 38 0.5 28 1.5 27 2.1 37 2.5 28 1.2 31 1.6 28 1.5 27 1.3 23 1.2 22 0.8 16 0.7 48 0.7 40 0.6 39
Segmentation-based matting35.239.634.431.60.2 30 0.3 32 0.2 28 0.2 32 0.2 22 0.3 14 0.4 39 0.5 48 0.4 37 0.4 36 0.6 31 0.5 29 2.1 47 1.7 25 2.5 30 1.9 46 2.2 39 2.5 48 2 63 1.7 58 1.2 51 0.5 24 0.5 20 0.4 16
CCM35.338.536.4310.2 28 0.3 35 0.2 23 0.2 36 0.3 35 0.3 30 0.4 43 0.5 43 0.4 42 0.4 46 0.6 33 0.5 26 2.1 46 2.3 41 2.5 29 1.3 32 1.7 30 1.6 28 1.3 25 1.3 27 0.8 18 0.7 52 0.8 47 0.7 52
Global Sampling Matting35.735.538.932.60.2 16 0.3 41 0.2 21 0.2 30 0.3 32 0.3 26 0.4 36 0.5 44 0.4 35 0.4 41 0.8 45 0.6 45 2.1 48 2.1 39 2.7 35 2 48 2.8 50 2.6 49 1.4 34 1.3 28 0.9 25 0.5 31 0.6 32 0.5 25
Improved color matting3638.438.631.10.2 31 0.3 34 0.2 32 0.2 38 0.3 38 0.3 17 0.4 38 0.5 47 0.4 41 0.5 49 0.7 44 0.5 39 2.5 52 2.5 48 2.7 37 1.9 45 2.5 45 2.4 46 1.4 33 1.4 35 0.9 20 0.4 21 0.4 18 0.4 17
Shared Matting36.336.338.933.90.2 24 0.3 36 0.2 29 0.3 56 0.6 56 0.5 57 0.4 29 0.4 34 0.4 34 0.4 38 0.8 46 0.5 25 1.6 32 2 36 2.3 21 1.4 34 1.9 33 1.8 32 1.5 42 1.5 44 1.1 49 0.6 35 0.6 26 0.4 24
Comprehensive Weighted Color and Texture37.236.141.5340.4 58 0.4 58 0.5 59 0.4 58 0.5 52 0.5 52 0.3 24 0.4 22 0.4 24 0.3 28 0.6 35 0.4 17 1.1 12 1.8 28 2.4 24 1 22 1.4 24 1.2 18 1.7 60 1.8 60 1.2 56 0.5 27 0.9 53 0.4 22
CSC Matting37.740.829.143.10.3 43 0.2 26 0.3 50 0.3 45 0.3 33 0.6 58 0.5 50 0.4 32 0.5 51 0.5 51 0.6 36 0.7 55 1.6 31 1.7 21 2.6 31 1.5 36 1.6 27 2 40 1.4 40 1.3 31 0.9 29 0.5 30 0.6 27 0.5 31
TSPS-RV Matting38.343.131.939.90.2 25 0.2 29 0.2 13 0.2 42 0.2 26 0.3 36 0.5 49 0.4 30 0.4 48 0.3 24 0.5 29 0.7 54 2.9 58 2.2 40 2.9 43 2.4 52 2.2 40 2.9 54 1.6 57 1.2 26 1 41 0.6 38 0.6 35 0.5 30
Global Sampling Matting (filter version)41.438.942.542.80.2 32 0.4 55 0.3 45 0.3 54 0.4 48 0.4 51 0.5 55 0.5 50 0.5 56 0.6 56 0.8 48 0.7 56 1.3 21 1.7 24 2.2 19 2 47 2.7 48 2.2 43 1.3 24 1.2 25 1.2 52 0.4 22 0.7 42 0.4 20
LocalSamplingAndKnnClassification41.642.842.439.80.2 41 0.3 39 0.2 37 0.2 26 0.3 30 0.3 24 0.4 28 0.4 31 0.4 25 0.4 43 0.7 41 0.5 40 2.9 57 3.1 54 3.9 57 2.5 53 3.2 55 2.9 53 1.6 50 1.5 45 1 39 0.7 44 0.7 44 0.6 43
LNCLM matting42.644.543.939.50.2 33 0.2 25 0.3 41 0.3 51 0.4 47 0.3 35 0.5 57 0.6 59 0.5 54 0.5 48 0.7 40 0.6 41 2.1 49 2.6 50 2.9 42 1.5 38 2.4 43 2 38 1.6 48 1.6 50 0.9 23 0.6 32 0.6 37 0.6 42
Weighted Color and Texture Matting43.341.943.1450.2 40 0.3 42 0.2 35 0.3 53 0.4 49 0.5 54 0.4 32 0.4 24 0.4 36 0.5 50 1.1 54 0.7 57 1.9 42 2.4 44 3.3 53 1.5 39 2 36 1.9 35 1.4 38 1.4 41 1.1 46 0.6 41 0.9 55 0.6 44
SPS matting43.542.446.841.50.2 37 0.3 47 0.3 40 0.4 59 0.7 59 0.5 53 0.5 51 0.5 52 0.5 55 0.6 58 1.4 59 0.7 52 1.3 23 2 35 2.5 26 2.1 50 2.7 49 2.1 42 1 18 1.2 21 0.8 13 0.6 43 0.8 52 0.7 51
Iterative Transductive Matting44.345.943.843.30.3 46 0.4 50 0.3 42 0.2 43 0.6 55 0.5 56 0.5 59 0.5 36 0.4 49 0.3 31 1.1 53 0.5 38 2 44 2.1 38 3 48 1.8 44 2.5 46 2.3 44 1.6 55 1.4 34 1 37 0.7 45 0.6 38 0.5 32
Improving Sampling Criterion45.4464644.30.3 45 0.4 48 0.3 48 0.3 55 0.4 50 0.4 44 0.5 54 0.5 55 0.5 57 0.9 62 1.4 60 0.9 60 2.2 50 2.7 51 2.9 44 2.6 54 3.2 54 2.6 50 1.1 20 1.1 19 0.9 22 0.5 28 0.6 31 0.5 29
SRLO Matting45.545.848.442.30.3 56 0.4 52 0.3 55 0.3 57 0.6 57 0.6 59 0.5 53 0.5 37 0.4 38 0.4 45 1.2 55 0.5 30 1.2 18 1.9 34 2.6 33 1.4 35 2.5 47 1.8 31 1.6 52 1.9 62 1 42 0.7 50 0.7 43 0.7 50
Learning Based Matting46.244.548.145.90.3 49 0.3 44 0.3 51 0.2 33 0.3 34 0.3 23 0.4 45 0.5 53 0.4 47 0.4 39 0.6 37 0.5 37 1.9 40 2.5 47 3.2 52 3.1 61 3.6 60 3.9 61 1.4 31 1.6 52 1 36 0.9 58 1.1 58 1.2 60
LMSPIR46.545.347.1470.3 55 0.4 53 0.3 54 0.3 50 0.7 58 0.5 55 0.4 48 0.5 38 0.4 46 0.4 37 1.2 56 0.5 34 1.5 29 2.5 46 3.2 51 1.6 41 2.4 44 1.9 34 1.6 53 1.6 49 1.2 55 0.7 49 0.6 33 0.6 47
Closed-Form Matting4747.147.846.30.3 44 0.3 43 0.3 47 0.2 28 0.3 37 0.3 29 0.4 41 0.5 51 0.4 43 0.4 44 0.6 39 0.6 43 3.3 60 3.6 59 4.6 59 2.9 60 3.5 58 3.7 60 1.5 47 1.5 46 0.9 30 0.7 53 0.8 49 1.2 59
Local Spline Regression (LSR)47.248.448.1450.2 39 0.3 37 0.3 39 0.2 31 0.3 42 0.3 34 0.4 44 0.5 45 0.4 40 0.4 40 0.7 43 0.5 36 3.4 61 3.5 58 4.5 58 2.9 57 3 52 3.2 55 1.6 58 1.7 57 1 43 0.8 57 0.8 51 0.9 55
KNN Matting47.350.547.643.90.3 51 0.3 45 0.3 43 0.3 47 0.3 41 0.3 39 0.6 62 0.6 58 0.6 62 0.5 53 1 50 0.6 47 2.8 55 2.8 52 3 47 1.5 37 1.9 34 1.6 29 1.5 44 1.5 42 0.9 28 0.8 55 1.2 59 0.9 56
Robust Matting48.34548.651.30.3 47 0.4 51 0.3 52 0.5 60 0.9 60 0.6 60 0.4 42 0.5 46 0.5 52 0.5 52 0.8 47 0.7 51 1.8 39 2.6 49 3.1 50 2 49 3.1 53 2.7 51 1.4 35 1.6 53 1.2 58 0.6 36 0.6 30 0.5 36
Large Kernel Matting49.249.550.347.80.3 48 0.3 46 0.3 49 0.2 37 0.3 43 0.2 13 0.5 52 0.6 57 0.5 53 0.5 54 1.3 57 0.7 53 2.9 56 3.3 57 3.7 54 2.6 56 3.3 56 3.4 59 1.4 37 1.4 36 1.1 47 0.8 56 0.8 50 0.8 54
High-res matting49.847.553.848.30.2 42 0.3 38 0.3 46 0.2 44 0.5 53 0.4 46 0.4 40 0.5 49 0.4 45 0.4 47 1.3 58 0.5 33 2.3 51 2.9 53 3.7 56 2.6 55 3.8 61 3.3 58 1.8 62 1.8 61 1.2 57 0.6 39 1.1 57 0.6 45
Shared Matting (Real Time)51.551.951.151.40.3 57 0.5 60 0.4 58 0.6 61 0.9 61 0.7 61 0.4 47 0.5 54 0.4 50 0.6 57 1.1 52 0.6 48 2 43 2.5 45 2.9 46 1.7 42 2.1 38 2 39 1.6 54