sladro aaa794fe10 feat: Enhance preprocessing and detection with letterbox resizing and transformation metadata ... - Added `resize_mode` option to `preprocess_node` for handling image resizing strategies: stretch, keep ratio, and letterbox. - Implemented `BuildLetterbox` function to create letterbox resized frames while maintaining aspect ratio. - Introduced `FrameTransformMeta` structure to store transformation metadata for frames, including scaling and padding information. - Updated detection coordinate calculations in `ai_yolo_node` to utilize transformation metadata for accurate bounding box adjustments. - Enhanced bounding box mapping in `osd_node` to account for potential discrepancies between detection and frame sizes. - Refactored image processing logic to support new resizing modes and ensure compatibility with existing formats.		2026-02-27 20:05:20 +08:00
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frame.h	feat: Enhance preprocessing and detection with letterbox resizing and transformation metadata	2026-02-27 20:05:20 +08:00