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Gesture Lexicon

A comprehensive catalog of gestures recognized by the Comp-Core motion intelligence system. Each gesture is defined by its kinematic signature, anticipation profile, and semantic meaning.

Embodied Trajectory Systems research note experiment writeup candidate score 34 .md

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Gesture Lexicon

A comprehensive catalog of gestures recognized by the Comp-Core motion intelligence system. Each gesture is defined by its kinematic signature, anticipation profile, and semantic meaning.

---

1. [Basic Gestures](#basic-gestures)
2. [Compound Gestures](#compound-gestures)
3. [Full-Body Gestures](#full-body-gestures)
4. [Latent Space Signatures](#latent-space-signatures)
5. [Training Data Requirements](#training-data-requirements)

---

Basic Gestures

Directional Gestures

#### `SWIPE_LEFT`
ID: `0x01` | Domain: Hand | Duration: 150-400ms

Move hand/device rapidly from right to left.

Property	Value
Motion	Translation along negative X axis
Velocity Profile	Bell curve (slow → fast → slow)
Acceleration	Biphasic (positive then negative)

Anticipation Signature:

commitment:    [0.3, 0.7, 0.95, 0.95, 0.6, 0.3]
uncertainty:   [0.5, 0.2, 0.05, 0.05, 0.15, 0.4]
transition_p:  [+0.3, +0.4, +0.1, -0.2, -0.5, -0.2]

Semantic Meanings:
- Navigate back / previous
- Dismiss / reject
- Move to left context

cc-inscription Sigil: `ߕ` (Transition) when crossing a boundary

---

#### `SWIPE_RIGHT`
ID: `0x02` | Domain: Hand | Duration: 150-400ms

Move hand/device rapidly from left to right.

Property	Value
Motion	Translation along positive X axis
Velocity Profile	Bell curve
Acceleration	Biphasic

Anticipation Signature:

commitment:    [0.3, 0.7, 0.95, 0.95, 0.6, 0.3]
uncertainty:   [0.5, 0.2, 0.05, 0.05, 0.15, 0.4]
transition_p:  [+0.3, +0.4, +0.1, -0.2, -0.5, -0.2]

Semantic Meanings:
- Navigate forward / next
- Accept / confirm (some contexts)
- Move to right context

---

#### `SWIPE_UP`
ID: `0x03` | Domain: Hand | Duration: 150-400ms

Move hand/device rapidly upward.

Property	Value
Motion	Translation along positive Y axis
Velocity Profile	Bell curve
Acceleration	Biphasic

Semantic Meanings:
- Scroll down (content)
- Reveal / expand
- Increase / more

---

#### `SWIPE_DOWN`
ID: `0x04` | Domain: Hand | Duration: 150-400ms

Move hand/device rapidly downward.

Property	Value
Motion	Translation along negative Y axis
Velocity Profile	Bell curve
Acceleration	Biphasic

Semantic Meanings:
- Scroll up (content)
- Dismiss / minimize
- Decrease / less

---

Contact Gestures

#### `TAP`
ID: `0x10` | Domain: Hand | Duration: 50-150ms

Brief contact/impact followed by release.

Property	Value
Motion	Impulse (brief velocity spike)
Velocity Profile	Spike
Jerk	High magnitude, short duration

Anticipation Signature:

commitment:    [0.2, 0.9, 0.4]  // Very brief
uncertainty:   [0.6, 0.1, 0.5]
transition_p:  [+0.8, -0.6]     // Sharp bidirectional

Semantic Meanings:
- Select / activate
- Toggle
- Acknowledge

cc-inscription Sigil: `ߕ` (Transition) — discrete change point

---

#### `DOUBLE_TAP`
ID: `0x11` | Domain: Hand | Duration: 100-300ms

Two taps in rapid succession (inter-tap: 50-200ms).

Property	Value
Motion	Two impulses
Pattern	Spike, pause, spike
Max Inter-Tap	200ms

Anticipation Signature:

commitment:    [0.2, 0.9, 0.3, 0.9, 0.3]
uncertainty:   [0.5, 0.1, 0.4, 0.1, 0.5]
transition_p:  [+0.8, -0.5, +0.7, -0.6]

Semantic Meanings:
- Zoom in / focus
- Open / launch
- Confirm with emphasis

---

#### `TRIPLE_TAP`
ID: `0x12` | Domain: Hand | Duration: 150-450ms

Three taps in rapid succession.

Semantic Meanings:
- Select all
- System action / accessibility
- Reset / home

---

#### `HOLD`
ID: `0x13` | Domain: Hand | Duration: 500ms+

Maintain position with minimal movement.

Property	Value
Motion	Near-stationary
Velocity	< threshold for 500ms
Stability	High

Anticipation Signature:

commitment:    [0.5, 0.7, 0.85, 0.9, 0.92, 0.93]  // Climbing
uncertainty:   [0.3, 0.15, 0.08, 0.05, 0.03, 0.02]
transition_p:  [0.0, 0.0, 0.0, 0.0, 0.0, 0.0]     // Flat

Semantic Meanings:
- Context menu / options
- Drag initiation
- Sustained attention
- Dwell selection

cc-inscription Sigil: `ߡ` (Dwell) — sustained stay

---

Spatial Gestures

#### `CIRCLE_CW`
ID: `0x20` | Domain: Hand | Duration: 400-1200ms

Clockwise circular motion.

Property	Value
Motion	Rotation in XY plane
Angular Velocity	Sustained, consistent
Path Closure	~360°

Anticipation Signature:

commitment:    [0.4, 0.6, 0.65, 0.7, 0.65, 0.6, 0.5]  // Oscillating
uncertainty:   [0.5, 0.35, 0.3, 0.25, 0.3, 0.4, 0.5]
transition_p:  [+0.2, +0.1, 0.0, -0.05, -0.1, -0.15]

Semantic Meanings:
- Rotate object (CW)
- Increase value (dial)
- Redo / forward in time

cc-inscription Sigil: `ߚ` (Oscillation) — periodic pattern

---

#### `CIRCLE_CCW`
ID: `0x21` | Domain: Hand | Duration: 400-1200ms

Counter-clockwise circular motion.

Semantic Meanings:
- Rotate object (CCW)
- Decrease value (dial)
- Undo / back in time

---

#### `SPIRAL_OUT`
ID: `0x22` | Domain: Hand | Duration: 500-1500ms

Circular motion with increasing radius.

Property	Value
Motion	Expanding spiral
Radius	Monotonically increasing
Angular Velocity	Consistent or decreasing

Anticipation Signature:

commitment:    [0.4, 0.5, 0.55, 0.55, 0.5, 0.45, 0.4]
uncertainty:   [0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7]  // Rising
transition_p:  [+0.05, +0.05, +0.02, 0.0, -0.02, -0.05]

Semantic Meanings:
- Zoom out / expand view
- Reveal more options
- Dispersion / spread

cc-inscription Sigil: `ߜ` (Dispersion) — spread increased

---

#### `SPIRAL_IN`
ID: `0x23` | Domain: Hand | Duration: 500-1500ms

Circular motion with decreasing radius.

Semantic Meanings:
- Zoom in / focus
- Narrow selection
- Convergence / gather

cc-inscription Sigil: `ߛ` (Stabilization) — dispersion decreased

---

#### `FIGURE_8`
ID: `0x24` | Domain: Hand | Duration: 800-2000ms

Figure-eight pattern (lemniscate).

Property	Value
Motion	Two connected loops
Crossover	At center point
Symmetry	Bilateral

Semantic Meanings:
- Calibration gesture
- Infinity / loop / repeat
- Dual selection

---

Kinetic Gestures

#### `SHAKE`
ID: `0x30` | Domain: Hand | Duration: 300-1000ms

Rapid oscillation along one or more axes.

Property	Value
Motion	High-frequency oscillation
Frequency	3-10 Hz
Amplitude	Medium

Anticipation Signature:

commitment:    [0.3, 0.4, 0.35, 0.4, 0.38, 0.35, 0.3]  // Noisy
uncertainty:   [0.6, 0.55, 0.6, 0.55, 0.6, 0.62, 0.65]
transition_p:  oscillating between [-0.3, +0.3]

Semantic Meanings:
- Undo / cancel / clear
- Shuffle / randomize
- Alert / attention

cc-inscription Sigil: `ߚ` (Oscillation) — rapid alternation

---

#### `FLICK`
ID: `0x31` | Domain: Hand | Duration: 50-200ms

Fast ballistic motion in a direction, released.

Property	Value
Motion	High initial velocity, release
Peak Velocity	High
Deceleration	Passive (not controlled)

Semantic Meanings:
- Throw / send
- Quick scroll with momentum
- Dismiss forcefully

---

#### `PUSH`
ID: `0x32` | Domain: Hand | Duration: 200-500ms

Forward motion with controlled deceleration.

Property	Value
Motion	Translation along Z axis
Velocity Profile	Controlled stop

Semantic Meanings:
- Push object away
- Confirm / send
- Navigate deeper

---

#### `PULL`
ID: `0x33` | Domain: Hand | Duration: 200-500ms

Backward motion toward body.

Semantic Meanings:
- Pull object closer
- Retrieve / fetch
- Navigate back

---

Compound Gestures

Compound gestures are sequences of basic gestures that form higher-level meanings.

Navigation Sequences

#### `POINT_AND_HOLD`
Sequence: `POINT → HOLD` | Duration: 800-2000ms

Point to location, then hold for selection.

Basic Gestures: [POINT, HOLD]
Timing: POINT(200-400ms) → HOLD(500ms+)

Semantic Meanings:
- Select target
- Focus attention
- Request context menu

Anticipation Pattern:

Phase 1 (POINT): commitment↑, uncertainty↓
Phase 2 (HOLD):  commitment→0.9, uncertainty→0.05, transition_p→0

---

#### `SWIPE_HOLD_RELEASE`
Sequence: `SWIPE → HOLD → RELEASE` | Duration: 600-1500ms

Drag gesture with controlled release.

Semantic Meanings:
- Drag and drop
- Slider adjustment
- Precise positioning

---

#### `DOUBLE_SWIPE`
Sequence: `SWIPE → SWIPE (same direction)` | Duration: 300-700ms

Two swipes in rapid succession.

Semantic Meanings:
- Fast navigation
- Skip / jump
- Strong directional intent

---

Communication Sequences

#### `ATTENTION_WAVE`
Sequence: `WAVE × 2-3` | Duration: 1000-2000ms

Repeated wave gesture.

Semantic Meanings:
- Get attention
- Greeting
- Signal readiness

---

#### `NOD_SEQUENCE`
Sequence: `NOD × 2-3` | Domain: Head/Full-body | Duration: 400-1000ms

Repeated downward head motion.

Semantic Meanings:
- Agreement / yes
- Acknowledgment
- Encouragement

---

#### `SHAKE_HEAD`
Sequence: `HEAD_TURN_LEFT → HEAD_TURN_RIGHT × 2+` | Duration: 500-1500ms

Repeated lateral head rotation.

Semantic Meanings:
- Disagreement / no
- Disapproval
- Negation

---

Control Sequences

#### `PINCH_SPREAD`
Sequence: `PINCH → SPREAD` or `SPREAD → PINCH` | Duration: 400-1200ms

Zoom control sequence.

Semantic Meanings:
- Zoom in/out
- Expand/collapse
- Adjust scale

---

#### `ROTATE_ADJUST`
Sequence: `CIRCLE_CW → HOLD` or `CIRCLE_CCW → HOLD` | Duration: 500-1500ms

Dial adjustment with confirmation.

Semantic Meanings:
- Set value precisely
- Confirm rotation
- Lock orientation

---

Full-Body Gestures

Postural Gestures

#### `T_POSE`
ID: `0x80` | Domain: Full-body | Duration: 1000ms+

Arms extended horizontally, feet together.

Property	Value
Key Joints	Shoulders, elbows, wrists
Angles	Shoulder abduction ~90°
Stability	High

Semantic Meanings:
- Calibration pose
- Ready state
- Full attention

cc-inscription Sigil: `ߡ` (Dwell) — sustained reference pose

---

#### `ARMS_UP`
ID: `0x81` | Domain: Full-body | Duration: 500ms+

Both arms raised above head.

Semantic Meanings:
- Victory / celebration
- Surrender / submission
- Maximum reach

---

#### `ARMS_CROSSED`
ID: `0x82` | Domain: Full-body | Duration: 1000ms+

Arms crossed over chest.

Semantic Meanings:
- Closed / defensive
- Waiting
- Disagreement

---

#### `CROUCH`
ID: `0x83` | Domain: Full-body | Duration: 500ms+

Lowered body position.

Semantic Meanings:
- Defensive stance
- Preparation to jump
- Hiding / stealth

---

Locomotive Gestures

#### `STEP_FORWARD`
ID: `0x90` | Domain: Full-body | Duration: 300-600ms

Single step forward.

Semantic Meanings:
- Advance / approach
- Agreement / commitment
- Enter

---

#### `STEP_BACK`
ID: `0x91` | Domain: Full-body | Duration: 300-600ms

Single step backward.

Semantic Meanings:
- Retreat / withdraw
- Hesitation
- Exit

---

#### `PIVOT`
ID: `0x92` | Domain: Full-body | Duration: 400-800ms

Rotation of body while feet stay planted.

Semantic Meanings:
- Change focus
- Redirect attention
- Look around

cc-inscription Sigil: `ߠ` (Place-Shift) — location class change

---

Expressive Gestures

#### `BOW`
ID: `0xA0` | Domain: Full-body | Duration: 800-2000ms

Forward bend at waist.

Semantic Meanings:
- Greeting
- Respect / gratitude
- Completion / finale

---

#### `SHRUG`
ID: `0xA1` | Domain: Full-body | Duration: 300-800ms

Shoulders raised briefly.

Semantic Meanings:
- Uncertainty / don't know
- Indifference
- Acceptance of situation

cc-inscription Sigil: `ߜ` (Dispersion) — increased uncertainty in expression

---

Latent Space Signatures

Each gesture occupies a characteristic region in the 104-D latent space. These signatures enable:

1. Classification: Recognizing gestures from embeddings
2. Interpolation: Smooth transitions between gestures
3. Generation: Synthesizing new gesture variants

Signature Visualization

                    COMMITMENT
                        ↑
                        │
         TAP ●          │        ● HOLD
                        │
    ─────────────────────────────────────→ STABILITY
                        │
         SHAKE ●        │        ● CIRCLE
                        │
                        ↓

                    (Low stability = high uncertainty)

Clustering Properties

Cluster	Gestures	Characteristics
Ballistic	Swipe, Flick, Tap	High commitment peak, brief
Exploratory	Circle, Spiral, Wave	Moderate commitment, sustained
Static	Hold, T-pose, Stand	High commitment, low transition
Oscillatory	Shake, Nod, Rock	Oscillating signals
Transitional	Step, Pivot, Reach	Transition-dominated

Embedding Distances

Typical centroid distances between gesture categories:

TAP ──── 1.2 ────> DOUBLE_TAP
TAP ──── 2.8 ────> SWIPE
TAP ──── 4.1 ────> CIRCLE
TAP ──── 5.5 ────> HOLD

SWIPE_LEFT ──── 0.8 ────> SWIPE_RIGHT  (Same category)
SWIPE_LEFT ──── 3.2 ────> SWIPE_UP     (Different axis)

---

Training Data Requirements

Minimum Samples Per Gesture

Gesture Type	Minimum Samples	Recommended	Notes
Basic (tap, swipe)	100	500+	High variability
Spatial (circle)	150	800+	Complex trajectory
Compound	200	1000+	Sequence variations
Full-body	50	200+	Capture setup dependent

Labeling Protocol

python

# Example labeling session structure
session = LabeledSession()
session.register_label(GestureLabel.hand(0x01, "swipe_left"))
session.register_label(GestureLabel.hand(0x10, "tap"))

session.start_recording("training_session_001")

# During recording, mark gesture boundaries
session.add_label(0x01, timestamp_start, timestamp_end)
session.add_frame(frame)  # Continuous streaming

Quality Criteria

1. Temporal Alignment: Labels within ±50ms of true boundaries
2. Coverage: All gesture variants represented
3. Negative Samples: Include similar-but-different motions
4. Environmental Variation: Different users, speeds, contexts

---

Appendix: Gesture ID Registry

Hand Gestures (0x00-0x7F)

Range	Category
0x00-0x0F	Directional
0x10-0x1F	Contact
0x20-0x2F	Spatial
0x30-0x3F	Kinetic
0x40-0x7F	Reserved

Full-Body Gestures (0x80-0xFF)

Range	Category
0x80-0x8F	Postural
0x90-0x9F	Locomotive
0xA0-0xAF	Expressive
0xB0-0xFF	Reserved

---

References

[MOTION_SEMANTICS.md](./MOTION_SEMANTICS.md) — Theoretical framework
[cc-gesture](../../core/motion/cc-gesture/) — Implementation
[cc-anticipation](../../core/motion/cc-anticipation/) — Anticipation kernel

Promotion Decision

Attach run IDs, datasets, metrics, and reproduction commands.

Source Anchor

Comp-Core/docs/motion-language/GESTURE_LEXICON.md

Detected Structure

Method · Evaluation · References · Architecture

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Gesture Lexicon

Table of Contents

Basic Gestures

Directional Gestures

Contact Gestures

Spatial Gestures

Kinetic Gestures

Compound Gestures

Navigation Sequences

Communication Sequences

Control Sequences

Full-Body Gestures

Postural Gestures

Locomotive Gestures

Expressive Gestures

Latent Space Signatures

Signature Visualization

Clustering Properties

Embedding Distances

Training Data Requirements

Minimum Samples Per Gesture

Labeling Protocol

Quality Criteria

Appendix: Gesture ID Registry

Hand Gestures (0x00-0x7F)

Full-Body Gestures (0x80-0xFF)

References

Promotion Decision

Source Anchor

Detected Structure