Hand Pose Lab

Smoothing & thresholds

Stillness tolerance (degrees)1.5°Ignore small angle changes3°Maximum joint speed180°/s

Small changes below the angle threshold are ignored. Speed limits apply after thumb and pinch fitting. Lower speed is smoother but follows fast gestures more slowly.

Palm rotation smoothing (0 = off)1×

These settings are separate from the fist preset. Joint locks and saved joint limits still apply. Zero angle threshold and zero stillness tolerance disable their holds.

01 / Capture

Camera

Camera off. You can also load a sample or your own image.

Load image

Hand to detectModel hand

Freeze stores the exact frame and landmarks that produced the pose. New tracking results cannot change your edits.

Fingertip contact

Fit thumb contact with any fingertip

Yellow dots mark mesh tips; green dots and lines show model joints. Touch the thumb to any fingertip. Screen overlap is an estimated contact cue, not measured physical collision.

3D movement & stability

Move hand in 3D space Use screenshot fist bendsThumb fist proximity20% of palm width

The thumb uses the fist preset only when curled and close to the folded fingers. Smaller proximity requires a closer match. A raised thumb keeps tracking freely.

Reported distance calibration (metres)

The frame outline matches the camera preview. Wrist position follows its image point; palm size fits perspective depth. Physical distance remains an estimate.

Still poses settle after 0.3 seconds. Larger movement releases the hold. Zero tolerance disables holding. Original v80 hand geometry and thumb attachments are restored. Four-finger screenshot side/twist alignment is always fixed; thumb alignment transitions from a straight relaxed thumb to your fist reference; only base knuckles and the lower thumb can spread. thumb uses your reference when making a fist.

Saved poses 0

Apply my saved poses in live modeMatch tolerance 0.18

No pose matched

Smaller tolerance needs a closer match. This is example matching, not model training. It only changes this lab.

Camera frame · same mirror as preview

3D mode: camera-matched framing · Turn off 3D movement to orbit and zoom · Click a joint
X · bend Y · sideways Z · locked

Pose name

What moves, and what am I editing?

Each finger has three movable joints. The four fingers use MCP (knuckle), PIP (middle), DIP (tip). The thumb uses CMC (base / opposition), MCP, IP. Base joints bend and move sideways together. Middle and tip joints bend in one plane. Z twist is locked to zero at every finger joint, including the thumb. Locked values remain visible but cannot be edited.

X bends / straightens. Y moves the whole finger sideways at its base; it is locked at middle and tip joints. Z twist is locked everywhere. The colored arrows show the exact local axes for the selected joint. The thumb has its own angled frame. These are model editing axes, not measured medical joint angles. Try a small positive or negative change to see its direction. Joint positions and segment lengths stay fixed.

The wrist follows the live palm orientation. Saved poses change only finger rotations, so recognizing a fist does not freeze the wrist. Structural locks also apply to imported poses. Additional limits on unlocked axes are optional. Saved examples and limits stay in this browser; export JSON to back them up or move them to another PC.

JSON backup / paste import