Ball tracking for cricket played before ball tracking

The appeals that were never reviewed.

For most of cricket's history an LBW shout was settled in a second by one person's eye, and that was the end of it. The geometry is still sitting in the footage. Mark six points on the pitch and the delivery is rebuilt in 3D — where it pitched, where it struck, and whether it was going on to hit the stumps.

Check your own clip Browse the verdicts

Drag to orbit · scroll to zoom

A sample delivery, rebuilt from six marked points. Every replay on this site is generated the same way, so you can turn it around and look from any angle.

Two ways in

If you came from the videos

Browse the verdicts

Every appeal reviewed here, with the replay you can spin yourself and the reasoning behind the call. Watch the video, then check the working.

Open the archive

If you have a clip of your own

Check an appeal

Load any video, mark six points on the ground, and get the replay and the decision. No account, nothing uploaded — it all runs in your browser.

Open the tool

How it works

Step one

Mark the crease box

Four corners of the rectangle in front of the stumps. A cricket pitch is built to exact dimensions, so those four clicks are enough to work out where the camera stood and turn any point on the ground into a real position.

Step two

Mark the bounce and the impact

Where the ball landed, and the spot on the ground beneath where it struck the pad. Both sit on the pitch surface, which is why they come out exactly rather than being guessed at.

Step three

Read the decision

Pitching, impact and wickets, judged against the stump lines the same way the protocol does — with an umpire's call band where the ball only clips.

What this is, and what it is not. These are reconstructions, not measurements. Broadcast ball tracking uses six calibrated high-speed cameras bolted in known positions. This works from one ordinary camera and points placed by hand, so the line and length come out firmly — they sit on the pitch, and the pitch has known dimensions — while how high up the pad the ball struck and how fast it was going remain estimates. Those two are left as sliders you can move, precisely so you can see for yourself how much a marginal call really rests on them. Where a decision turns on a centimetre, the honest answer is that the footage cannot settle it, and that is said rather than hidden.