Method

What Matters in Unsupervised Optical Flow [UFlow]
https://github.com/google-research/google-research/tree/master/uflow

Submitted on 21 Aug. 2020 10:58 by
Rico Jonschkowski (Robotics at Google)

Running time:0.04 s
Environment:1 core @ 2.5 Ghz (C/C++)

Method Description:
We systematically compare and analyze a set of
key components in unsupervised optical flow to
identify which photometric loss, occlusion
handling, and smoothness regularization is most
effective. Alongside this investigation we
construct a number of novel improvements to
unsupervised flow models, such as cost volume
normalization, stopping the gradient at the
occlusion mask, encouraging smoothness before
upsampling the flow field, and continual self-
supervision with image resizing.
Parameters:
All parameters are listed in the paper.
Latex Bibtex:
@inproceedings{jonschkowski2020matters,
title={What Matters in Unsupervised Optical
Flow},
author={Rico Jonschkowski and Austin Stone
and
Jonathan T. Barron and Ariel Gordon and Kurt
Konolige and Anelia Angelova},
booktitle={ECCV},
year={2020},
}

Detailed Results

This page provides detailed results for the method(s) selected. For the first 20 test images, the percentage of erroneous pixels is depicted in the table. We use the error metric described in , which considers a pixel to be correctly estimated if the disparity or flow end-point error is <3px or <5% (for scene flow this criterion needs to be fulfilled for both disparity maps and the flow map). Underneath, the left input image, the estimated results and the error maps are shown (for disp_0/disp_1/flow/scene_flow, respectively). The error map uses the log-color scale described in , depicting correct estimates (<3px or <5% error) in blue and wrong estimates in red color tones. Dark regions in the error images denote the occluded pixels which fall outside the image boundaries. The false color maps of the results are scaled to the largest ground truth disparity values / flow magnitudes.

Test Set Average

Error Fl-bg Fl-fg Fl-all
All / All 9.78 17.87 11.13
All / Est 9.78 17.87 11.13
Noc / All 7.01 14.75 8.41
Noc / Est 7.01 14.75 8.41
This table as LaTeX

Test Image 0

Error Fl-bg Fl-fg Fl-all
All / All 5.09 23.11 7.57
All / Est 5.09 23.11 7.57
Noc / All 5.27 23.11 7.98
Noc / Est 5.27 23.11 7.98
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 1

Error Fl-bg Fl-fg Fl-all
All / All 4.81 19.53 6.46
All / Est 4.81 19.53 6.46
Noc / All 4.52 19.53 6.37
Noc / Est 4.52 19.53 6.37
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 2

Error Fl-bg Fl-fg Fl-all
All / All 8.71 15.23 9.03
All / Est 8.71 15.23 9.03
Noc / All 6.54 15.23 7.05
Noc / Est 6.54 15.23 7.05
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 3

Error Fl-bg Fl-fg Fl-all
All / All 11.28 52.19 15.06
All / Est 11.28 52.19 15.06
Noc / All 9.45 37.40 11.85
Noc / Est 9.45 37.40 11.85
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 4

Error Fl-bg Fl-fg Fl-all
All / All 10.15 34.60 14.21
All / Est 10.15 34.60 14.21
Noc / All 9.00 33.83 13.64
Noc / Est 9.00 33.83 13.64
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 5

Error Fl-bg Fl-fg Fl-all
All / All 8.73 0.00 7.94
All / Est 8.73 0.00 7.94
Noc / All 7.93 0.00 7.11
Noc / Est 7.93 0.00 7.11
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 6

Error Fl-bg Fl-fg Fl-all
All / All 8.75 1.01 7.93
All / Est 8.75 1.01 7.93
Noc / All 7.05 1.01 6.33
Noc / Est 7.05 1.01 6.33
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 7

Error Fl-bg Fl-fg Fl-all
All / All 4.35 37.53 10.84
All / Est 4.35 37.53 10.84
Noc / All 4.35 37.57 10.56
Noc / Est 4.35 37.57 10.56
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 8

Error Fl-bg Fl-fg Fl-all
All / All 3.46 9.87 4.64
All / Est 3.46 9.87 4.64
Noc / All 3.46 9.87 4.64
Noc / Est 3.46 9.87 4.64
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 9

Error Fl-bg Fl-fg Fl-all
All / All 4.35 21.92 8.83
All / Est 4.35 21.92 8.83
Noc / All 4.35 21.92 8.83
Noc / Est 4.35 21.92 8.83
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 10

Error Fl-bg Fl-fg Fl-all
All / All 4.78 11.41 6.29
All / Est 4.78 11.41 6.29
Noc / All 5.24 11.41 6.84
Noc / Est 5.24 11.41 6.84
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 11

Error Fl-bg Fl-fg Fl-all
All / All 4.59 8.49 5.29
All / Est 4.59 8.49 5.29
Noc / All 4.93 8.50 5.65
Noc / Est 4.93 8.50 5.65
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 12

Error Fl-bg Fl-fg Fl-all
All / All 5.05 5.20 5.06
All / Est 5.05 5.20 5.06
Noc / All 3.72 5.20 3.84
Noc / Est 3.72 5.20 3.84
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 13

Error Fl-bg Fl-fg Fl-all
All / All 4.46 8.32 4.94
All / Est 4.46 8.32 4.94
Noc / All 2.83 9.81 3.64
Noc / Est 2.83 9.81 3.64
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 14

Error Fl-bg Fl-fg Fl-all
All / All 4.04 7.59 4.10
All / Est 4.04 7.59 4.10
Noc / All 2.85 7.59 2.95
Noc / Est 2.85 7.59 2.95
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 15

Error Fl-bg Fl-fg Fl-all
All / All 11.11 10.71 11.08
All / Est 11.11 10.71 11.08
Noc / All 8.91 10.71 9.12
Noc / Est 8.91 10.71 9.12
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 16

Error Fl-bg Fl-fg Fl-all
All / All 19.01 23.07 19.61
All / Est 19.01 23.07 19.61
Noc / All 13.09 23.07 14.88
Noc / Est 13.09 23.07 14.88
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 17

Error Fl-bg Fl-fg Fl-all
All / All 7.93 14.82 8.65
All / Est 7.93 14.82 8.65
Noc / All 7.27 14.82 8.24
Noc / Est 7.27 14.82 8.24
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 18

Error Fl-bg Fl-fg Fl-all
All / All 18.27 85.12 50.03
All / Est 18.27 85.12 50.03
Noc / All 12.31 52.94 23.52
Noc / Est 12.31 52.94 23.52
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 19

Error Fl-bg Fl-fg Fl-all
All / All 6.04 14.52 7.00
All / Est 6.04 14.52 7.00
Noc / All 5.76 14.52 7.03
Noc / Est 5.76 14.52 7.03
This table as LaTeX

Input Image

Flow Result

Flow Error




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