Bounding Boxes (2D & 3D)

Bounding boxes are a fundamental annotation technique in computer vision, used to define the location and size of objects within an image or video. A bounding box is a simple rectangle drawn around an object, typically specified by its top-left and bottom-right corners or by its center coordinates, width, and height. Each box is assigned a class label, such as “car,” “person,” or “tree,” allowing AI models to detect, track, and classify objects. Bounding boxes are widely used in object detection, surveillance, autonomous driving, retail, and robotics, providing quick, efficient spatial information for training models while serving as a foundation for more advanced annotations.
Gemini_Generated_Image_n4culwn4culwn4cu

How Bounding Box Annotation Works

Object Selection: The annotator identifies the object(s) in an image or video frame that need to be labeled.

Box Drawing: A rectangle is drawn around each object, typically using the top-left and bottom-right corners or center coordinates with width and height. The box should cover the entire object while minimizing unnecessary background.

Class Labeling: Each box is assigned a category label (e.g., “car,” “pedestrian,” “dog”) so the model knows what the object represents.

Verification & Refinement: Annotated boxes are reviewed for accuracy, ensuring no objects are missed or mis-labeled.

Dataset Integration: The annotated images are stored in a structured format (like COCO or YOLO), ready for AI model training.



Applications

Object Detection: Detecting vehicles, pedestrians, traffic signs, and obstacles in autonomous driving systems.

Video Surveillance: Tracking people, vehicles, or moving objects across video frames for security and analytics.

Retail & Inventory Management: Detecting products on shelves or warehouses for stock monitoring and automated checkout systems.

Robotics & Automation: Helping robots locate and interact with objects in real time.

Wildlife Monitoring & Conservation: Tracking animals in images or camera trap videos for research and population studies.

Medical Imaging: Locating lesions, tumors, or organs in X-rays, CT scans, or MRIs as a preliminary detection step.