{
 "summary": {
  "about": "SCION 30 / SAM 2: per scene frame, what the dog did, measured from the rendered dog layer (x_screen, y_screen = alpha-weighted centroid in px; bbox; iou_prev = IoU of the dog silhouette with the previous frame at 320x180). state = the state the picture shows from its measured onset. facing: +1 toward the door (right), -1 away, 0 toward the camera.",
  "measured_onsets": [
   {
    "choice": "retreat",
    "score_t": 1,
    "measured_t": 0.875,
    "dt": -0.125,
    "signal": "the silhouette starts changing every frame or two (>= 3 changes of IoU<0.97 in 6 frames), where the idle hold changes once in 7"
   },
   {
    "choice": "watch",
    "score_t": 2.333,
    "measured_t": 2.417,
    "dt": 0.084,
    "signal": "leaves the backing gait: head comes up (IoU below the gait minimum of the half second before)"
   },
   {
    "choice": "refuse",
    "score_t": 3.417,
    "measured_t": 3.417,
    "dt": -0.0,
    "signal": "the silhouette starts changing every frame or two (>= 3 changes of IoU<0.97 in 6 frames), where the idle hold changes once in 7"
   },
   {
    "choice": "watch",
    "score_t": 7.458,
    "measured_t": 7.458,
    "dt": 0.0,
    "signal": "first rendered frame where a head part pointing at the door replaces the held head (silhouette change, body held)"
   },
   {
    "choice": "approach",
    "score_t": 14.708,
    "measured_t": 14.625,
    "dt": -0.083,
    "signal": "the silhouette starts changing every frame or two (>= 3 changes of IoU<0.97 in 6 frames), where the idle hold changes once in 7"
   },
   {
    "choice": "lie_down",
    "score_t": 23.792,
    "measured_t": 23.792,
    "dt": -0.0,
    "signal": "body centroid starts a sustained lowering (>= 6 px over 6 frames)"
   },
   {
    "choice": "look in",
    "score_t": 26.4,
    "measured_t": 26.417,
    "dt": 0.017,
    "signal": "head lifts: f47 (nose down) -> f40 (level, 3 frames) -> f01 mirrored (back of the head to the viewer, into the room)"
   }
  ],
  "mapping": "x_screen ~ 985 - 205 * (x_score - 0.59) for the body centroid; fixed camera"
 },
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