RH20T synchronization inspection

task_0001_user_0007_scene_0001_cfg_0005: camera 036422060215 → camera 037522062165

camera 036422060215: datasets/rh20t/xc/RH20T_cfg5/task_0001_user_0007_scene_0001_cfg_0005/cam_036422060215/color/color.mp4 · camera 037522062165: datasets/rh20t/xc/RH20T_cfg5/task_0001_user_0007_scene_0001_cfg_0005/cam_037522062165/color/color.mp4

Fitted mapping

offset at anchor
-104.05 ms
drift
+0.0 ppm
coarse-scan confidence
0.123
matched pairs
5
matched fraction
A 38% · B 33%
residual p95
19.2 ms (0.27 samples)
events detected
A 13 · B 15
sample period
camera 036422060215 68 ms · camera 037522062165 70 ms
Events A / B
13 / 15

Fit reported problems: drift_unresolvable: fitted 4315.7 ppm is below 2x its own standard error (2999.1 ppm) over a 3.7 s baseline; returning offset-only

Confidence, residual p95 and matched fraction are all computed downstream of the pairing. If the pairing is aliased they describe how self-consistent the wrong answer is, not whether it is right. That is what the frames below are for.

Residual against event time

-80-40+0+40+800s1s2s3s4sresidual (ms)

Blue band is ±1 sampling period of the slower stream. Red points are the events rendered below; blue points are the matched pairs not rendered.

Matched events (5 of 5 rendered)

Left tile is the reference: stream A at its own event time. The three right-hand tiles are stream B under three competing pairings, each drawn at the B-clock instant that pairing predicts for the reference. The chosen one should depict the same moment as the reference and the neighbours should not.

Cameras observe the scene from different viewpoints; compare the physical action, not pixel identity.

Event 1 · A[0] ↔ B[1] · residual +0.0 ms +0.00 samples

reference · camera 036422060215
reference · camera 036422060215
event A[0] at +0.000 s (1640002330272 ms)
frame #49 at +0.002 s (1640002330274 ms)
no channel reading at this instant
prev candidate · camera 037522062165
prev candidate · camera 037522062165
-761.2 ms -10.87 samples
offset change if adopted
event B[0] at +-0.865 s (1640002329407 ms)
rendered at +-0.865 s (1640002329407 ms)
frame #22 at +-0.865 s (1640002329407 ms)
no channel reading at this instant
frame differs visibly from chosen (p95 pixel change 15/255)
chosen pairing · camera 037522062165
chosen pairing · camera 037522062165
+0.0 ms +0.00 samples
residual
event B[1] at +-0.104 s (1640002330168 ms)
rendered at +-0.104 s (1640002330168 ms)
frame #32 at +-0.108 s (1640002330164 ms)
no channel reading at this instant
frames and channels below are measured against this tile
next candidate · camera 037522062165
next candidate · camera 037522062165
+515.3 ms +7.36 samples
offset change if adopted
event B[2] at +0.411 s (1640002330683 ms)
rendered at +0.411 s (1640002330683 ms)
frame #39 at +0.412 s (1640002330684 ms)
no channel reading at this instant
frame differs visibly from chosen (p95 pixel change 15/255)
Nearest rejected neighbour is 515× further from the mapped instant than the chosen pairing.

Event 2 · A[1] ↔ B[3] · residual +10.3 ms +0.15 samples

reference · camera 036422060215
reference · camera 036422060215
event A[1] at +1.014 s (1640002331286 ms)
frame #61 at +1.026 s (1640002331298 ms)
no channel reading at this instant
prev candidate · camera 037522062165
prev candidate · camera 037522062165
-499.1 ms -7.13 samples
offset change if adopted
event B[2] at +0.411 s (1640002330683 ms)
rendered at +0.401 s (1640002330673 ms)
frame #39 at +0.412 s (1640002330684 ms)
no channel reading at this instant
frame differs visibly from chosen (p95 pixel change 17/255)
chosen pairing · camera 037522062165
chosen pairing · camera 037522062165
+10.3 ms +0.15 samples
residual
event B[3] at +0.921 s (1640002331192 ms)
rendered at +0.910 s (1640002331182 ms)
frame #46 at +0.913 s (1640002331185 ms)
no channel reading at this instant
frames and channels below are measured against this tile
next candidate · camera 037522062165
next candidate · camera 037522062165
+1117.7 ms +15.97 samples
offset change if adopted
event B[4] at +2.028 s (1640002332300 ms)
rendered at +2.018 s (1640002332289 ms)
frame #62 at +2.027 s (1640002332299 ms)
no channel reading at this instant
frame differs visibly from chosen (p95 pixel change 43/255)
Nearest rejected neighbour is 49× further from the mapped instant than the chosen pairing.

Event 3 · A[3] ↔ B[4] · residual -16.2 ms -0.23 samples

reference · camera 036422060215
reference · camera 036422060215
event A[3] at +2.148 s (1640002332420 ms)
frame #72 at +2.148 s (1640002332420 ms)
no channel reading at this instant
prev candidate · camera 037522062165
prev candidate · camera 037522062165
-1123.6 ms -16.05 samples
offset change if adopted
event B[3] at +0.921 s (1640002331192 ms)
rendered at +0.937 s (1640002331209 ms)
frame #46 at +0.913 s (1640002331185 ms)
no channel reading at this instant
frame differs visibly from chosen (p95 pixel change 43/255)
chosen pairing · camera 037522062165
chosen pairing · camera 037522062165
-16.2 ms -0.23 samples
residual
event B[4] at +2.028 s (1640002332300 ms)
rendered at +2.044 s (1640002332316 ms)
frame #62 at +2.027 s (1640002332299 ms)
no channel reading at this instant
frames and channels below are measured against this tile
next candidate · camera 037522062165
next candidate · camera 037522062165
+728.0 ms +10.40 samples
offset change if adopted
event B[5] at +2.772 s (1640002333044 ms)
rendered at +2.788 s (1640002333060 ms)
frame #72 at +2.770 s (1640002333042 ms)
no channel reading at this instant
frame differs visibly from chosen (p95 pixel change 52/255)
Nearest rejected neighbour is 45× further from the mapped instant than the chosen pairing.

Event 4 · A[4] ↔ B[5] · residual -0.6 ms -0.01 samples

reference · camera 036422060215
reference · camera 036422060215
event A[4] at +2.877 s (1640002333149 ms)
frame #81 at +2.865 s (1640002333137 ms)
no channel reading at this instant
prev candidate · camera 037522062165
prev candidate · camera 037522062165
-744.9 ms -10.64 samples
offset change if adopted
event B[4] at +2.028 s (1640002332300 ms)
rendered at +2.029 s (1640002332300 ms)
frame #62 at +2.027 s (1640002332299 ms)
no channel reading at this instant
frame differs visibly from chosen (p95 pixel change 52/255)
chosen pairing · camera 037522062165
chosen pairing · camera 037522062165
-0.6 ms -0.01 samples
residual
event B[5] at +2.772 s (1640002333044 ms)
rendered at +2.773 s (1640002333045 ms)
frame #72 at +2.770 s (1640002333042 ms)
no channel reading at this instant
frames and channels below are measured against this tile
next candidate · camera 037522062165
next candidate · camera 037522062165
+805.9 ms +11.51 samples
offset change if adopted
event B[6] at +3.579 s (1640002333851 ms)
rendered at +3.579 s (1640002333851 ms)
frame #82 at +3.573 s (1640002333845 ms)
no channel reading at this instant
frame differs visibly from chosen (p95 pixel change 23/255)
Nearest rejected neighbour is 745× further from the mapped instant than the chosen pairing.

Event 5 · A[5] ↔ B[6] · residual +19.2 ms +0.27 samples

reference · camera 036422060215
reference · camera 036422060215
event A[5] at +3.664 s (1640002333935 ms)
frame #93 at +3.663 s (1640002333935 ms)
no channel reading at this instant
prev candidate · camera 037522062165
prev candidate · camera 037522062165
-787.3 ms -11.25 samples
offset change if adopted
event B[5] at +2.772 s (1640002333044 ms)
rendered at +2.753 s (1640002333025 ms)
frame #72 at +2.770 s (1640002333042 ms)
no channel reading at this instant
frame differs visibly from chosen (p95 pixel change 23/255)
chosen pairing · camera 037522062165
chosen pairing · camera 037522062165
+19.2 ms +0.27 samples
residual
event B[6] at +3.579 s (1640002333851 ms)
rendered at +3.560 s (1640002333831 ms)
frame #82 at +3.573 s (1640002333845 ms)
no channel reading at this instant
frames and channels below are measured against this tile
next candidate · camera 037522062165
next candidate · camera 037522062165
+580.5 ms +8.29 samples
offset change if adopted
event B[7] at +4.140 s (1640002334412 ms)
rendered at +4.121 s (1640002334393 ms)
frame #90 at +4.140 s (1640002334412 ms)
no channel reading at this instant
frame is indistinguishable from the chosen one (p95 pixel change 7/255)
Nearest rejected neighbour is 30× further from the mapped instant than the chosen pairing.