SootViz — benchmarks

The figures behind the numbers. Synthetic foils have a cell width known exactly by construction, so they are the only place where an error can be quoted against truth.

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regular

2.50true λ (mm)

2.48measured

-0.8 %error

0 %families agree to

0.84coherence

distribution for regular — The result: every spacing measured against the true value, the two families separately, and the block medians along the record.

how spacings were counted for regular — Where the numbers come from — the vertical cuts, the trajectory crossings found on them, and the gaps between consecutive crossings, which are the measurements.

blocks for regular — Each block with the family angles fitted inside it, its own cell width and its own count.

track families over regular — The per-block fields recombined over the whole record.

scale search for regular — The scale search. Flat means the answer does not depend on the assumed scale.

ok

sheared

2.50true λ (mm)

2.48measured

-0.8 %error

2 %families agree to

0.71coherence

distribution for sheared — The result: every spacing measured against the true value, the two families separately, and the block medians along the record.

how spacings were counted for sheared — Where the numbers come from — the vertical cuts, the trajectory crossings found on them, and the gaps between consecutive crossings, which are the measurements.

blocks for sheared — Each block with the family angles fitted inside it, its own cell width and its own count.

track families over sheared — The per-block fields recombined over the whole record.

scale search for sheared — The scale search. Flat means the answer does not depend on the assumed scale.

ok

irregular

2.00true λ (mm)

1.88measured

-6.0 %error

0 %families agree to

0.56coherence

distribution for irregular — The result: every spacing measured against the true value, the two families separately, and the block medians along the record.

how spacings were counted for irregular — Where the numbers come from — the vertical cuts, the trajectory crossings found on them, and the gaps between consecutive crossings, which are the measurements.

blocks for irregular — Each block with the family angles fitted inside it, its own cell width and its own count.

track families over irregular — The per-block fields recombined over the whole record.

scale search for irregular — The scale search. Flat means the answer does not depend on the assumed scale.

ok

noisy, low contrast

3.00true λ (mm)

2.52measured

-16.0 %error

6 %families agree to

0.50coherence

distribution for noisy, low contrast — The result: every spacing measured against the true value, the two families separately, and the block medians along the record.

how spacings were counted for noisy, low contrast — Where the numbers come from — the vertical cuts, the trajectory crossings found on them, and the gaps between consecutive crossings, which are the measurements.

blocks for noisy, low contrast — Each block with the family angles fitted inside it, its own cell width and its own count.

track families over noisy, low contrast — The per-block fields recombined over the whole record.

scale search for noisy, low contrast — The scale search. Flat means the answer does not depend on the assumed scale.