Computer vision carve analysis
Read
Your line
Upload one carve. Board Vision tracks 33 body landmarks through every frame, measures how far you compress, rotate and lean — then sets your range and your timing beside the middle half of a pro cohort.
carve clip · frontside
One carve per clip · frontside or backside · on the web now, iOS soon
What it measures
Three signals,
every frame
Thirty-three landmarks per frame reduce to three measurements in true image pixels. Each one is smoothed, then summarized into the five numbers the pro band is drawn for.
Compression
Ratio · 1.0 extended → 0.5 deep
How deep you load the support leg, tracked frame by frame as a ratio of leg extension — straight hip-to-ankle distance over the bent path through the knee.
Rotation
Normalized 0 → 1
How far your shoulders wind off your hips, with a foreshortening fallback for when you're facing the camera and the angle between the two axles stops being trustworthy.
Lean
Signed degrees off vertical
How far you lay the body over from your knees, not your hips — so a hinge at the waist doesn't get mistaken for bank. The sign is camera-relative.
How it works
Four steps,
one carve
Film one turn
Whole body in frame, start to finish. Shoot it on whatever you've got.
Tag and upload
Frontside or backside, then send the clip. Rotation is baked into the pixels and the clip is resampled to a constant 24 fps.
Pose tracking reads it
33 landmarks per frame, lined up 1:1 with the pixels — and your clip comes back with the skeleton overlaid, frame-accurate.
Your numbers meet the band
Board Vision cross-correlates all three signals against each other over ±5 frames, then sets your range and your coordination beside the middle half of eighteen measured pro carves.
The read-out
Set beside
the pros
Five measurements come off your clip — two for range, three for coordination. Each is placed against the median and interquartile range of a measured pro cohort. Fixed geometry and a published table, not a language model writing encouragement.
Legs led · Connected
Compression /
rotation correlation
0.87
Compression /
rotation lag
3 fr
Analyzable
coverage
94%
Frames
analyzed
118/126
Five measurements, one cohort
The band is the middle half of the cohort — a quarter of the measured pros sit below it.
| Measurement | This clip | Pro band |
|---|---|---|
| Range of motion | ||
| Compression rangeDialed | 0.31 | 0.24–0.53 |
| Lean rangeLean more | 42° | 60–78° |
| Coordination | ||
| Compression ↔ LeanFluid | 0.81 | 0.63–0.87 |
| Rotation ↔ LeanFluid | 0.74 | 0.30–0.80 |
| Compression ↔ RotationFluid | 0.87 | 0.32–0.78 |
Four of five inside the band; lean range is short of it.
Per-frame signals · shared time axis
Three different units — never one shared scale.
Frame 063126
Honest limits
What it
doesn’t do
A narrow measurement you can trust beats a broad one you can’t.
One carve per clip
Frontside or backside. Carves only for now — snaps, wraps and cutbacks are coming.
There is still no score
It measures mechanics and timing, not style points. No grade, no rating, no percentile. The pro band is a reference to sit your numbers beside, not a pass mark — a quarter of the measured pros fall below it on any given metric.
It tells you when it can't see
Every read-out ships with its coverage, per signal, so you know which body part left the frame. Under 60% it turns the clip down rather than guessing.
Pricing
Same analysis
either way
Pro is about volume, not features. Every clip gets the same three signals, the same pro band, the same read-out and the same skeleton overlay.
Free
$0
NO CARD, NO RENEWAL
- Three analyses, one carve each
- All three signals, measured against the pro band
- Frame-accurate skeleton overlay
- Coverage report on every clip
Pro
For every session$9.99/ MONTH
BILLED MONTHLY, CANCEL ANY TIME
- Thirty analyses a month
- Everything in Free — same analysis, same depth
- Allowance resets monthly
- Cancel whenever — refused clips never count
Prices shown in your local currency, tax included.
FAQ
Straight
answers
- What kind of clip works best?
- One carve, whole body in frame from start to finish, shot side-on if you can and kept under about three seconds. Board Vision runs in the browser today, with iOS to follow once the App Store approves it. Either way the clip is normalized before anything is measured: rotation baked into the pixels, a constant 24 fps, long side capped at 1280.
- Why did it refuse my clip?
- Coverage came in under 60% — too few frames where all three signals were readable at once. Compression, rotation and lean each need their own joints in view, so keep your shoulders, hips and knees in frame for the whole clip. Usually it's a limb out of shot, a rider too small in the frame, or spray over the body. Board Vision would rather turn the clip down than guess at the gaps.
- Does it compare me to pro surfers?
- Yes — that's the reference. Board Vision publishes the median and interquartile range of eighteen measured pro carves for five numbers: your compression range, your lean range, and the three coordination coefficients. Your clip is placed on that band. It isn't a grade and it isn't a pass mark — the band is the middle half of the cohort, so a quarter of the measured pros sit below it on any given metric.
- What is coverage?
- The share of frames the tracker could actually read — every signal at once, plus how often it saw a body at all, plus a figure per signal so you know which body part to keep in frame next time. It's evidence, not a grade: a high-coverage reading of a badly ridden carve is normal and correct.
- Which maneuvers are supported?
- Carves, one per clip, tagged frontside or backside. Snaps, wraps and cutbacks are coming.