Apple Vision Framework for computer vision tasks: subject segmentation, pose detection, text recognition, barcode scanning, and document processing.

• Covers 13+ Vision APIs across subject lifting, hand/body pose, person segmentation, text OCR, barcode detection, and document scanning with decision trees for choosing the right tool
• Includes 15 production patterns: combining APIs to exclude hands from objects, real-time gesture recognition, multi-person segmentation, fitness action classification, and live camera scanning
• Requires iOS 14+ minimum; instance masks and 3D body pose need iOS 17+; DataScannerViewController requires iOS 16+
• All Vision processing must run on background queues to prevent UI freezing; confidence scores must be checked before using landmarks to avoid unreliable detections