Alpha Matting Evaluation Website

Image Matting Evaluation•Datasets•Code•Submit

How to use this page?

Please be patient until all images have loaded completely.
Move the mouse over the numbers in the table to see the corresponding images.
Drag the red rectangle in the leftmost image to change the location of the zoom.
Press and hold any key to temporarily deactivate the links.

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

SIM 2.8 3 2.1 3.4 8.3 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

IamAlpha 5.6 4.9 4.8 7.3 10.4 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

PIIAMatting 5.7 3.1 7.5 6.5 9.1 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

HDMatt 6.9 8.8 5.4 6.5 9.5 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 Refinement 8.8 9 7.9 9.6 10.2 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

AdaMatting 9 7.9 8 11.1 10.2 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 Matting 9.2 6.9 6.9 13.8 9.3 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 Matting 9.5 7.5 8.9 12 9.1 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 Matting 10.6 11.6 7.6 12.5 8.8 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 Matting 11.3 10.1 12.5 11.3 10.1 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 Matting 12 13.5 10.5 11.9 9.7 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 Matting 12 13.9 12 10.1 8.9 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 Matting 12.4 14 11.5 11.6 10.7 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 matting 14.8 16 15.4 12.9 10.3 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 Matting 15.8 18.5 14.5 14.4 12.6 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 Matting 16.9 18.8 14.9 17 12 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

AlphaGAN 17.3 18.3 17.6 16.1 9.6 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 Matting 19.8 23.9 17.9 17.6 10.4 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 matting 22 17.9 19.8 28.4 10.7 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 Matting 24.3 27.6 26.8 18.5 14 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 Matting 25.4 25 25.5 25.8 11.7 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 Matting 26.9 30.4 23.1 27.3 13.6 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 Matting 27 23.4 27.5 30 12.2 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 matting 28 28.5 28.8 26.6 12.6 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 Sampling 28.2 26.5 28.3 29.8 11.6 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 Matting 28.3 22.4 30.5 31.9 10.9 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 Matting 29.5 27.6 29.5 31.5 11.3 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 Matting 30.3 31.3 30.5 29 13.1 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 Matting 30.8 33.6 31.3 27.4 18.7 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 sampling 30.8 27.4 31.3 33.6 11.2 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 Texture 31.3 30.6 32.6 30.6 14.6 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 matting 31.8 35 32.6 27.6 13.7 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

LocalSamplingAndKnnClassification 33.3 35.9 31.4 32.8 12.6 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 Matting 34 31.5 36.3 34.3 13.1 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

CCM 34.3 37.4 34.3 31.4 13.8 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 matting 34.4 36.8 34.3 32.1 10.9 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 Matting 34.5 32.6 38.1 32.6 10.8 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 Matting 36.8 33.5 39.6 37.4 10.9 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 Matting 37.8 36.3 40.4 36.6 14.7 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 matting 38.1 38.9 37.3 38.3 12.8 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 matting 39.3 39.5 38.6 39.8 14.9 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 Matting 39.6 41.5 41.3 36 16.2 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) 39.7 41.9 36.4 40.9 12.2 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) 39.9 37.6 42.6 39.4 12.3 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 Matting 41.1 41.6 40.3 41.4 16 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

LMSPIR 42.1 41.1 43.9 41.4 15.2 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) 42.6 41.3 43.5 43 12.4 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 Matting 43 41.6 40.6 46.9 12.7 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 Criterion 46.7 45.9 48.5 45.8 12.7 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 Laplacian 47.3 49.4 46 46.4 15.1 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 Matting 47.5 49.1 46.9 46.5 17.2 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 Matting 48.2 44.5 49.1 51 17.3 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 matting 50.3 49.6 53.3 47.9 13.4 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 matting 51.2 49.8 52.5 51.4 18.6 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 Weights 51.7 51.8 51.5 51.8 23.2 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 Matting 54.9 56.5 52.5 55.8 17.9 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 Matting 56.1 57 55.9 55.5 26.9 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 Matting 57.2 56.5 57.1 58 23.6 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

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
SIM	2.8	3	2.1	3.4	8.3 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
IamAlpha	5.6	4.9	4.8	7.3	10.4 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
PIIAMatting	5.7	3.1	7.5	6.5	9.1 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
HDMatt	6.9	8.8	5.4	6.5	9.5 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 Refinement	8.8	9	7.9	9.6	10.2 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
AdaMatting	9	7.9	8	11.1	10.2 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 Matting	9.2	6.9	6.9	13.8	9.3 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 Matting	9.5	7.5	8.9	12	9.1 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 Matting	10.6	11.6	7.6	12.5	8.8 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 Matting	11.3	10.1	12.5	11.3	10.1 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 Matting	12	13.5	10.5	11.9	9.7 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 Matting	12	13.9	12	10.1	8.9 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 Matting	12.4	14	11.5	11.6	10.7 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 matting	14.8	16	15.4	12.9	10.3 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 Matting	15.8	18.5	14.5	14.4	12.6 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 Matting	16.9	18.8	14.9	17	12 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
AlphaGAN	17.3	18.3	17.6	16.1	9.6 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 Matting	19.8	23.9	17.9	17.6	10.4 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 matting	22	17.9	19.8	28.4	10.7 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 Matting	24.3	27.6	26.8	18.5	14 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 Matting	25.4	25	25.5	25.8	11.7 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 Matting	26.9	30.4	23.1	27.3	13.6 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 Matting	27	23.4	27.5	30	12.2 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 matting	28	28.5	28.8	26.6	12.6 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 Sampling	28.2	26.5	28.3	29.8	11.6 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 Matting	28.3	22.4	30.5	31.9	10.9 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 Matting	29.5	27.6	29.5	31.5	11.3 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 Matting	30.3	31.3	30.5	29	13.1 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 Matting	30.8	33.6	31.3	27.4	18.7 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 sampling	30.8	27.4	31.3	33.6	11.2 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 Texture	31.3	30.6	32.6	30.6	14.6 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 matting	31.8	35	32.6	27.6	13.7 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
LocalSamplingAndKnnClassification	33.3	35.9	31.4	32.8	12.6 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 Matting	34	31.5	36.3	34.3	13.1 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
CCM	34.3	37.4	34.3	31.4	13.8 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 matting	34.4	36.8	34.3	32.1	10.9 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 Matting	34.5	32.6	38.1	32.6	10.8 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 Matting	36.8	33.5	39.6	37.4	10.9 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 Matting	37.8	36.3	40.4	36.6	14.7 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 matting	38.1	38.9	37.3	38.3	12.8 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 matting	39.3	39.5	38.6	39.8	14.9 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 Matting	39.6	41.5	41.3	36	16.2 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)	39.7	41.9	36.4	40.9	12.2 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)	39.9	37.6	42.6	39.4	12.3 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 Matting	41.1	41.6	40.3	41.4	16 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
LMSPIR	42.1	41.1	43.9	41.4	15.2 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)	42.6	41.3	43.5	43	12.4 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 Matting	43	41.6	40.6	46.9	12.7 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 Criterion	46.7	45.9	48.5	45.8	12.7 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 Laplacian	47.3	49.4	46	46.4	15.1 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 Matting	47.5	49.1	46.9	46.5	17.2 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 Matting	48.2	44.5	49.1	51	17.3 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 matting	50.3	49.6	53.3	47.9	13.4 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 matting	51.2	49.8	52.5	51.4	18.6 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 Weights	51.7	51.8	51.5	51.8	23.2 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 Matting	54.9	56.5	52.5	55.8	17.9 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 Matting	56.1	57	55.9	55.5	26.9 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 Matting	57.2	56.5	57.1	58	23.6 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