Method

Memory-Efficient Optical Flow via Radius-Distribution Orthogonal Cost Volume [MeFlow]
[Anonymous Submission]

Submitted on 10 May. 2024 07:56 by
[Anonymous Submission]

Running time:0.12 s
Environment:1 core @ 2.5 Ghz (C/C++)

Method Description:
The key of MeFlow is a recurrent local orthogonal
cost volume representation, which decomposes the
2D search space dynamically into two 1D orthogonal
spaces, enabling our method to scale effectively
to very high-resolution inputs. To preserve
essential information in the orthogonal space, we
utilize self attention to propagate feature
information from the 2D space to the orthogonal
space. We further propose a radius-distribution
multi-scale lookup strategy to model the
correspondences of large displacements at a
negligible cost.
Parameters:
See paper for details
Latex Bibtex:

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 Object Scene Flow for Autonomous Vehicles (CVPR 2015), 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 Object Scene Flow for Autonomous Vehicles (CVPR 2015), 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 4.59 6.75 4.95
All / Est 4.59 6.75 4.95
Noc / All 2.82 3.72 2.99
Noc / Est 2.82 3.72 2.99
This table as LaTeX

Test Image 0

Error Fl-bg Fl-fg Fl-all
All / All 1.68 24.71 4.84
All / Est 1.68 24.71 4.84
Noc / All 1.78 24.71 5.25
Noc / Est 1.78 24.71 5.25
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 1

Error Fl-bg Fl-fg Fl-all
All / All 1.99 10.53 2.95
All / Est 1.99 10.53 2.95
Noc / All 1.92 10.53 2.99
Noc / Est 1.92 10.53 2.99
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 2

Error Fl-bg Fl-fg Fl-all
All / All 4.80 19.47 5.52
All / Est 4.80 19.47 5.52
Noc / All 3.85 19.47 4.76
Noc / Est 3.85 19.47 4.76
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 3

Error Fl-bg Fl-fg Fl-all
All / All 8.72 30.74 10.76
All / Est 8.72 30.74 10.76
Noc / All 6.73 17.09 7.62
Noc / Est 6.73 17.09 7.62
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 4

Error Fl-bg Fl-fg Fl-all
All / All 2.60 2.13 2.52
All / Est 2.60 2.13 2.52
Noc / All 2.75 1.94 2.60
Noc / Est 2.75 1.94 2.60
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 5

Error Fl-bg Fl-fg Fl-all
All / All 4.13 0.08 3.77
All / Est 4.13 0.08 3.77
Noc / All 3.54 0.08 3.19
Noc / Est 3.54 0.08 3.19
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 6

Error Fl-bg Fl-fg Fl-all
All / All 5.55 0.49 5.02
All / Est 5.55 0.49 5.02
Noc / All 3.21 0.49 2.89
Noc / Est 3.21 0.49 2.89
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 7

Error Fl-bg Fl-fg Fl-all
All / All 1.28 3.46 1.71
All / Est 1.28 3.46 1.71
Noc / All 1.28 3.29 1.66
Noc / Est 1.28 3.29 1.66
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 8

Error Fl-bg Fl-fg Fl-all
All / All 0.26 2.18 0.61
All / Est 0.26 2.18 0.61
Noc / All 0.26 2.18 0.61
Noc / Est 0.26 2.18 0.61
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 9

Error Fl-bg Fl-fg Fl-all
All / All 0.36 4.00 1.29
All / Est 0.36 4.00 1.29
Noc / All 0.36 4.00 1.29
Noc / Est 0.36 4.00 1.29
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 10

Error Fl-bg Fl-fg Fl-all
All / All 1.15 2.67 1.50
All / Est 1.15 2.67 1.50
Noc / All 1.10 2.67 1.51
Noc / Est 1.10 2.67 1.51
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 11

Error Fl-bg Fl-fg Fl-all
All / All 2.21 0.89 1.97
All / Est 2.21 0.89 1.97
Noc / All 2.24 0.89 1.97
Noc / Est 2.24 0.89 1.97
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 12

Error Fl-bg Fl-fg Fl-all
All / All 2.47 0.49 2.33
All / Est 2.47 0.49 2.33
Noc / All 0.99 0.49 0.95
Noc / Est 0.99 0.49 0.95
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 13

Error Fl-bg Fl-fg Fl-all
All / All 3.73 1.27 3.42
All / Est 3.73 1.27 3.42
Noc / All 1.32 0.67 1.24
Noc / Est 1.32 0.67 1.24
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 14

Error Fl-bg Fl-fg Fl-all
All / All 3.40 1.91 3.37
All / Est 3.40 1.91 3.37
Noc / All 2.04 1.91 2.04
Noc / Est 2.04 1.91 2.04
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 15

Error Fl-bg Fl-fg Fl-all
All / All 10.52 2.86 9.83
All / Est 10.52 2.86 9.83
Noc / All 7.98 2.86 7.40
Noc / Est 7.98 2.86 7.40
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 16

Error Fl-bg Fl-fg Fl-all
All / All 13.86 2.94 12.26
All / Est 13.86 2.94 12.26
Noc / All 7.29 2.94 6.51
Noc / Est 7.29 2.94 6.51
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 17

Error Fl-bg Fl-fg Fl-all
All / All 5.80 1.26 5.33
All / Est 5.80 1.26 5.33
Noc / All 5.00 1.26 4.52
Noc / Est 5.00 1.26 4.52
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 18

Error Fl-bg Fl-fg Fl-all
All / All 18.11 99.99 57.01
All / Est 18.11 99.99 57.01
Noc / All 12.31 99.96 36.49
Noc / Est 12.31 99.96 36.49
This table as LaTeX

Input Image

Flow Result

Flow Error


Test Image 19

Error Fl-bg Fl-fg Fl-all
All / All 3.62 2.70 3.51
All / Est 3.62 2.70 3.51
Noc / All 3.20 2.70 3.13
Noc / Est 3.20 2.70 3.13
This table as LaTeX

Input Image

Flow Result

Flow Error




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