axiom-ios-vision

Original：🇺🇸 English

Translated

Use when implementing ANY computer vision feature - image analysis, object detection, pose detection, person segmentation, subject lifting, hand/body pose tracking.

1installs

Sourcecharleswiltgen/axiom

Added on2026-02-04

NPX Install

npx skill4agent add charleswiltgen/axiom axiom-ios-vision

SKILL.md Content

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iOS Computer Vision Router

You MUST use this skill for ANY computer vision work using the Vision framework.

When to Use

Use this router when:

Analyzing images or video
Detecting objects, faces, or people
Tracking hand or body pose
Segmenting people or subjects
Lifting subjects from backgrounds
Recognizing text in images (OCR)
Detecting barcodes or QR codes
Scanning documents
Using VisionKit or DataScannerViewController

Routing Logic

Vision Work

Implementation patterns →

/skill axiom-vision

Subject segmentation (VisionKit)
Hand pose detection (21 landmarks)
Body pose detection (2D/3D)
Person segmentation
Face detection
Isolating objects while excluding hands
Text recognition (VNRecognizeTextRequest)
Barcode/QR detection (VNDetectBarcodesRequest)
Document scanning (VNDocumentCameraViewController)
Live scanning (DataScannerViewController)
Structured document extraction (RecognizeDocumentsRequest, iOS 26+)

API reference →

/skill axiom-vision-ref

Complete Vision framework API
VNDetectHumanHandPoseRequest
VNDetectHumanBodyPoseRequest
VNGenerateForegroundInstanceMaskRequest
VNRecognizeTextRequest (fast/accurate modes)
VNDetectBarcodesRequest (symbologies)
DataScannerViewController delegates
RecognizeDocumentsRequest (iOS 26+)
Coordinate conversion patterns

Diagnostics →

/skill axiom-vision-diag

Subject not detected
Hand pose missing landmarks
Low confidence observations
Performance issues
Coordinate conversion bugs
Text not recognized or wrong characters
Barcodes not detected
DataScanner showing blank or no items
Document edges not detected

Decision Tree

Implementing (pose, segmentation, OCR, barcodes, documents, live scanning)? → vision
Need API reference / code examples? → vision-ref
Debugging issues (detection failures, confidence, coordinates)? → vision-diag

Anti-Rationalization

Thought	Reality
"Vision framework is just a request/handler pattern"	Vision has coordinate conversion, confidence thresholds, and performance gotchas. vision covers them.
"I'll handle text recognition without the skill"	VNRecognizeTextRequest has fast/accurate modes and language-specific settings. vision has the patterns.
"Subject segmentation is straightforward"	Instance masks have HDR compositing and hand-exclusion patterns. vision covers complex scenarios.

Critical Patterns

vision:

Subject segmentation with VisionKit
Hand pose detection (21 landmarks)
Body pose detection (2D/3D, up to 4 people)
Isolating objects while excluding hands
CoreImage HDR compositing
Text recognition (fast vs accurate modes)
Barcode detection (symbology selection)
Document scanning with perspective correction
Live scanning with DataScannerViewController
Structured document extraction (iOS 26+)

vision-diag:

Subject detection failures
Landmark tracking issues
Performance optimization
Observation confidence thresholds
Text recognition failures (language, contrast)
Barcode detection issues (symbology, distance)
DataScanner troubleshooting
Document edge detection problems

Example Invocations

User: "How do I detect hand pose in an image?" → Invoke:

/skill axiom-vision

User: "Isolate a subject but exclude the user's hands" → Invoke:

/skill axiom-vision

User: "How do I read text from an image?" → Invoke:

/skill axiom-vision

User: "Scan QR codes with the camera" → Invoke:

/skill axiom-vision

User: "How do I implement document scanning?" → Invoke:

/skill axiom-vision

User: "Use DataScannerViewController for live text" → Invoke:

/skill axiom-vision

User: "Subject detection isn't working" → Invoke:

/skill axiom-vision-diag

User: "Text recognition returns wrong characters" → Invoke:

/skill axiom-vision-diag

User: "Barcode not being detected" → Invoke:

/skill axiom-vision-diag

User: "Show me VNDetectHumanBodyPoseRequest examples" → Invoke:

/skill axiom-vision-ref

User: "What symbologies does VNDetectBarcodesRequest support?" → Invoke:

/skill axiom-vision-ref

User: "RecognizeDocumentsRequest API reference" → Invoke:

/skill axiom-vision-ref