Touch Path Recorder

How the Touch Path Recorder Works

The Touch Path Recorder traces a finger's movement across the surface by joining every recorded position into a line. The tool measures path length, duration and average speed for each stroke.

1. Draw with a finger: Touch the surface and move. The path appears as a line.
2. Lift to end the stroke: Each stroke is saved with its points and timestamps.
3. Review stroke stats: See length in pixels and millimeters, time and speed.
4. Replay the path: Play back strokes at real speed to study the motion.

Touch Path Recorder Formula

The Touch Path Recorder path length equals the sum of the straight-line distances between consecutive points.

x(i), y(i)

Position of point i

Duration

Time from first to last point

Example: Points at (0, 0), (30, 40) and (30, 100) give segments of 50 px and 60 px. Length = 110 px (29.1 mm). Over 220 ms, speed = 0.5 px/ms.

Touch Path Recorder Reference Table

The Touch Path Recorder conversion table converts path lengths between pixels, millimeters and inches.

About the Touch Path Recorder

A Touch Path Recorder is a motion-tracking tool that saves the route a finger takes across a touchscreen. Each path is a list of points with times.

Path data shows straightness, speed and smoothness. Handwriting research and touchscreen testing both rely on this data, and engineers use straight-line paths to find jitter in the touch sensor.

Ways to Use the Touch Path Recorder

There are 5 main uses of the Touch Path Recorder, including line linearity tests and handwriting practice.

• ✓Line linearity tests: Technicians draw along a ruler to check for wavy tracking.
• ✓Handwriting practice: Children trace letters and replay their strokes.
• ✓Gesture design: Designers capture real swipe paths before setting gesture rules.
• ✓Motor research: Researchers measure path smoothness in tracing tasks.
• ✓Signature capture tests: Developers check stroke quality on signature pads.