🐴 Horse Analysis
Upload a video → get keypoints, gait labels, balance analysis, and passage scoring.
Horse only = fast (20 keypoints) · Horse + Rider = adds 17 rider keypoints (~2× slower).
📤
Drop a video here
or click to choose an .mp4 file
💡 Have a saved .npz from a previous run? Upload it to re-analyze instantly (plots + JSON, no video output). Mode is auto-detected.
Result
Result
Gait detected
Passage score
❓ What do the behavior labels mean? (click to expand)
- lying — lying down, body collapsed, still
- standing — standing still (includes grazing / eating)
- walking — relaxed 4-beat gait, about 1 second per stride
- trot — the normal 2-beat diagonal gait, ~0.5 s per stride
- running — fast, gallop-like movement
- passage — advanced dressage trot: elevated, slow-looking, with moments where all 4 hooves are airborne
⬆ Suspension (when shown above) = the moments all four hooves are off the ground together — normal in trot/passage, absent in walk.
How it works (2 steps)
- Step 1: quick threshold check — still vs moving.
- Step 2: every stride re-checked by its duration and hoof lift — so similar gaits (trot vs passage) can be told apart.
Words you'll see on screen
- osc (shown under the RULE label on the video) = how much the hooves move up and down in a 1-second window. Small osc = standing, medium = walking, large = running. It is the first quick check before the stride analysis.
- SI (Symmetry Index, in the balance card) = how different the left and right legs are. 0 = perfectly symmetric; bigger number = more one-sided.
- Suspension = all 4 hooves airborne at the same moment.
- Duty = the share of each stride a hoof stays on the ground.
- Lift = how high a hoof swings off the ground.
Why labels show decimal times (e.g. 2.07s – 2.67s)
- The numbers are seconds — when that behavior starts and ends in the video.
- Decimals because the analysis checks every frame (frame 62 of a 30 fps video = 2.07 s).
- 2.07s – 2.67s · trot = the horse was trotting from 2.07 to 2.67 s. Decimal precision is normal.
⬇ Download annotated video · ⬇ Export keypoints JSON · ⬇ Download keypoints npz (re-uploadable)
📊 Detailed analysis below — balance report, passage score, and per-frame keypoints.
🔧 Detection rule (technical, click to expand)
⚖️ Gait balance report
❓ How to read this balance report (click to expand)
What is being checked?
- Left and right legs should work as mirror images.
- Sore front leg → the head nods differently when that leg lands.
- Sore hind leg → the pelvis moves differently when that leg lands.
- These two signs (head nod + pelvis motion) are what vets use for side-view lameness screening.
- The report finds every hoof landing automatically, then compares left vs right.
What do the colored chips mean?
- Each chip is a symmetry score: 0 = perfectly symmetric, bigger number = more one-sided.
- Green < 0.05 = symmetric · amber < 0.10 = mild · red ≥ 0.10 = worth a look.
- Head nod = front-leg signal · Pelvis = hind-leg signal — these two are the most reliable.
- Duty = how long each hoof stays on the ground · Lift = how high it swings.
⚠️ Red does not mean "lame". The legs on the far side of the body are partly hidden, so their numbers are noisier — a red chip means "check the plot / film a longer video", not a diagnosis.
How to read the plot (top → bottom)
- Panel 1 — hoof paths: each curve is one leg's hoof height. Dips = hoof on the ground; dotted line = that leg's ground level; shading = grounded time.
- Panel 2 — head (nose) height: vertical lines mark each front-hoof landing. Head bobbing is normal — what matters is whether it differs between left and right landings.
- Panel 3 — tail base (pelvis) height: same idea for the hind legs.
- Panel 4 — duty bars: per stride, the fraction of time each hoof stayed grounded; the band is the normal zone for the detected gait.
This is a screening hint, NOT a diagnosis. If something is flagged: film 15–20 s of straight-line walking from the side (horse large in frame) and compare.
🏆 Passage score
❓ How is this score calculated? (click to expand)
What is passage?
- A top-level dressage movement: an elevated, "slow-motion" trot.
- Includes moments where all four hooves leave the ground.
- Judges score it 0–10 (10 = excellent · 6 = satisfactory · 4 = insufficient).
The 8 checks behind the score
Each check starts at 1.0 (perfect) and loses points when the measurement falls outside the scientific "passage zone":
- 🌊 Suspension (×2) — how much time ALL 4 hooves are airborne ("the float")
- 🥁 Cadence (×2) — is the tempo the same every stride?
- 🦵 Elevation (×1.5) — how high the hooves lift
- 🎯 Engagement (×1) — do the hind hooves step PAST the front prints? (pushing power from behind)
- 👑 Collection (×1.5) — is the poll (top of head) the highest point, with the nose carried on the vertical?
- 🧍 Rider torso · ✋ quiet hands · 🤝 harmony (not bouncing against the horse) — riding mode only
- Final = (0.7 × horse + 0.3 × rider) × 10
- Horse-only mode: rider part is skipped, horse score used directly.
The exact formula (worked example)
horse_score = (2×suspension + 2×cadence + 1.5×elevation
+ 1×engagement + 1.5×collection) / 9
rider_score = (torso + hands + harmony) / 3
FINAL = (0.7 × horse_score + 0.3 × rider_score) × 10
Worked example (this championship clip): horse = (2×0.84 + 2×0.82 + 1.5×1.00 + 1×0.20 + 1.5×1.00) / 9 = 0.815 · rider = (1.00 + 0.00 + 0.00) / 3 = 0.333 · FINAL = (0.7×0.815 + 0.3×0.333) × 10 = 6.7.
Band scoring (what a chip value means)
- Measurement inside the scientific passage zone → 1.0.
- Outside the zone → decays linearly toward 0.
- A chip showing 0.84 = "84% of the way into the ideal zone".
How to read the plot (top → bottom)
- Panel 1 — hoof paths: dips = grounded, rises = airborne. Yellow bands = all 4 hooves off the ground together = suspension. More/wider yellow = better.
- Panel 2 — head carriage: the purple line (poll) should stay ABOVE the gray dashed line (withers) = uphill, collected frame. The pink line (nose) should stay steady.
- Panel 3 — lift bars: each bar = one stride's highest hoof lift; the dashed line is the passage reference. Tall bars = flashy leg action.
- Panel 4 — duty bars: each bar = the share of the stride that hoof stayed grounded; the green band is the passage ideal zone.
Honest note: screening estimate from one side-view clip — great for comparing videos filmed the same way, but not an official judge mark.
Keypoints per frame
0.00s
frame 0
🐴 Horse keypoints (20 — AnimalPose)
| # | Name | Body part | x | y | Score | Visible |
|---|
🧍 Rider keypoints (17 — COCO)
| # | Name | Body part | x | y | Score | Visible |
|---|
📖 Reference: naming, colors & thresholds (click to expand)
- Naming: L/R = left/right side · F/B = front/back leg · Elbow → Knee → Paw = leg chain (Paw = hoof) · Withers = top of shoulders · TailBase = croup
- Rider naming (COCO): nose, eyes, ears, shoulders, elbows, wrists, hips, knees, ankles
- Colors: green = left side · orange = right side · blue = center line (MMPose dataset definition) · rider skeleton = cyan
- Pose rule: body_height_ratio < 0.25 AND osc < 0.0065 → lying · osc < 0.0065 → standing · osc > 0.0295 → running · else walking (T_lying is a placeholder until a lying video is labeled)
- Gait refinement: moving strides re-classified by stride duration + hoof lift → walking (0.8–1.4s) · trot (0.4–0.7s, orange) · passage (trot-like + high lift/suspension, gold)
- Modes: Horse only = fast (1 pose model) · Horse + Rider = adds rider keypoints + rider passage sub-scores + suspension overlay (2 pose models, ~2× slower)