# Hand movement illustrations

## Custom pose atlas · AirDesk 0.9

Generated on 31 August 2026 with OpenAI's built-in image-generation tool, without user photos or camera frames. Asset: `custom-poses.png` (2172 × 724), three columns showing closed fist, thumb up, and index/little fingers. Visually inspected for those finger states. No post-generation pixel edits. The authoritative pose/image selections now live in `gesture_catalog.hpp`; `interaction.hpp` declares image sheets. These images explain poses and are not evidence of recognition accuracy.

Prompt:

> Use case: scientific-educational. Create ONE horizontal gesture sprite atlas for a minimal Windows app, exactly three equal-width columns in a 3:1 image. Plain pure white background. Each column contains one realistic adult right hand and short wrist viewed from the palm side, centered, fully within its column with generous whitespace; matching skin tone, soft even studio light, consistent scale. NO text, no dividers, no arrows, no extra objects. Column 1: a CLOSED FIST, all four fingers curled into the palm, thumb tucked across the curled fingers, thumb not pointing up. Column 2: THUMBS UP, four fingers curled, only the thumb extended distinctly upward and away from the fist. Column 3: INDEX AND LITTLE FINGER extended upward, middle and ring fingers curled into palm, thumb folded across the curled fingers (the horns hand shape). Anatomically correct five digits on every hand. These precise finger states must be unambiguous because this is a control tutorial. Educational catalog photograph style, clean edges, no logos.

## Original finger guide illustration

Generated with the built-in OpenAI image-generation tool on 2026-08-30. No user camera frames or photographs were used. This is an instructional illustration, not training data or a model input. The three equal-width tiles depict pointing, pinching, and scrolling; runtime captions and tile selection come from `interaction.hpp`.

Saved asset: `finger-poses.png` (2172 x 724). Original generated output retained separately. No photo-editing or post-generation pixel changes were applied.

Prompt:

> Create a precise instructional hand-pose illustration asset for AirDesk, a minimalist touchless Windows pointer app. Wide 3:1 image, white background, THREE equal-width columns with no borders and NO TEXT, no lettering, no icons, no arrows. Three anatomically accurate right hands seen from the PALM side, wrist entering from bottom, identical scale and warm neutral skin color, realistic clean medical-manual illustration with subtle shading. Each hand isolated centrally within its own third with generous whitespace. Exactly five fingers per hand, natural joints, no extra digits. LEFT THIRD: index finger straight vertically upward, thumb clearly extended to the left and separated from index, middle ring and little fingers folded into palm. CENTER THIRD: thumb tip and index tip touching to form a small closed pinch loop; the index curves down naturally to meet thumb; middle ring and little fingers folded into palm. RIGHT THIRD: index and middle fingers straight upward and slightly separated in a narrow V, ring and little fingers folded into palm, thumb angled out left separate from both extended fingers. Match poses rigorously, make finger silhouettes unmistakable. No surrounding body, no objects, no gloves, no cropped fingertips. All hands centered at x=1/6,1/2,5/6 across canvas. Used as a horizontal sprite sheet; keep each hand entirely within its own equal third.

# Additional guide illustrations · AirDesk 0.6

Generated on 30 August 2026 using OpenAI's **built-in image-generation tool** (not CLI/API fallback). No user photos or live camera frames were supplied. The existing generated `finger-poses.png` was used only as a style reference. Final project assets are `grab-open.png` and `three-fingers.png`; the original point/two-finger sheet is retained unchanged. Each source raster is kept in this folder and cached at a smaller size in memory by the native app.

The grab/open illustration received one targeted correction so both poses show the same right hand. Images are explanatory examples, not evidence of recognition accuracy.

## Grab/open prompt

Use case: scientific-educational
Asset type: a square instructional hand illustration for a native desktop app's "Grab + open" gesture card.
Input image 1: STYLE reference only. Match its clean realistic anatomical illustration, warm neutral skin tone, palm-facing view and white background. Do not copy its gesture poses or three-column layout.
Primary request: Show exactly TWO separate views of the same right hand, side by side, in one square image. LEFT: a closed fist viewed from palm side, all four fingers fully curled into the palm and thumb tucked across the curled fingers (no thumb sticking outward). RIGHT: open palm toward the viewer, all five digits fully extended and gently spread. A small simple muted teal right arrow between the hands indicates closed fist to open hand. The left closed fist means grab; the right open hand means release.
Composition: each view isolated, same wrist baseline, both hands equally sized anatomically (fist is naturally shorter), hands fill most of canvas with generous separation; fully visible fingertips, wrist ends at bottom margin. Plain white background.
Constraints: anatomically correct five digits on each hand, natural joints. Precisely one closed fist and one five-digit open palm. No text, numbers, labels, borders, watermark, objects, gloves or body. Clean soft shading; clear silhouettes readable at small size.

### Targeted correction

Use case: precise-object-edit. Edit this instructional illustration with ONE correction: the open hand on the RIGHT side must be a RIGHT HAND seen palm-on, matching the closed right fist on the LEFT. Horizontally mirror ONLY that right-side open hand so its thumb points LEFT, toward the arrow, and its little finger is at the far right. Keep the closed fist exactly unchanged, the arrow pointing right exactly unchanged, the white background, square composition, skin color, soft shading, proportions, hand locations, full fingertips and wrist baseline unchanged. The open hand still has exactly five fully extended digits. No labels or text. This shows the SAME right hand first closed and then open.

## Three-finger prompt

Use case: scientific-educational
Asset type: square instructional hand illustration for a native desktop app's "Three fingers" double-click gesture card.
Input image 1: STYLE reference only. Match its clean realistic anatomical illustration, warm neutral skin tone, palm-facing view and white background. Do not copy its poses or multi-column layout.
Primary request: One right hand, palm facing viewer. INDEX, MIDDLE and RING fingers extended upward and slightly separated, unmistakably THREE raised fingers. LITTLE finger curled into palm; THUMB folded gently across the curled little finger. Thumb is not raised. Exactly five anatomical digits in total: three straight upward, one little finger curled, one thumb folded.
Composition: single hand centered in square frame, wrist at bottom, fingertips fully visible with small generous whitespace. Match the reference hand size, lighting, and clinical clarity.
Constraints: anatomically correct, natural joints. No extra fingers, no objects, no gloves, no body, no text, labels, numbers, borders or watermark. Plain white background, clean soft shading and crisp silhouette readable at small size.

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