Offline Tennis Player Tracking and Video Annotation
System type :
Computer Vision • Video Analysis • Offline Processing
Role :
Prototype Design • Model Integration • Tracking Logic Implementation
Industry
Broadcast sport and journalistic
Client
Media Solutions
This project focused on developing an offline video analysis prototype for tracking a single tennis player in recorded match footage. The goal was to extract a stable visual representation of the far-side player and generate structured metadata and annotated video outputs suitable for post-match analysis and broadcast-related workflows.
The system processes pre-recorded tennis match videos (non-live) and requires a manual rectangular ROI (Region of Interest) selection per video to define the far-side court area. Within this ROI, an AI-based person detection model (YOLO, detection-only mode) is used to identify the target player. Instead of relying on generic multi-object tracking, the prototype applies a domain-specific identity locking mechanism to maintain consistent tracking of the same player throughout the video.
Player identity stability is ensured by combining spatial distance constraints, vertical position consistency, and bounding-box size stability rules. This approach minimizes identity switching and visual jitter, prioritizing reliable and clean results over raw frame-rate performance. Each processed frame includes the ROI visualization, player bounding box, positional coordinates, and a confidence score indicating detection reliability.
The system generates multiple outputs, including a fully annotated video and a fixed-resolution cropped video containing only the tracked player. These outputs are designed for integration with downstream tools such as video mixing or post-production analysis software.
Key Features :
Offline batch processing (no real-time dependency)
Manual ROI selection per video
Single far-side tennis player detection and tracking
Stable, locked bounding box across the entire video
Confidence scoring per frame
Annotated full-video output
Fixed-resolution cropped player-only video
Local Python-based prototype application
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