Circle Annotation

Circle annotation enables accurate labeling of round objects in images—ideal for healthcare, retail, and surveillance to highlight tumors, products, or monitored areas.

AI and Computer Vision Projects

Quickly and accurately label round and elliptical objects with our circle annotation tool — designed for high-performance image recognition and machine learning models.

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Why Use Circle Annotations?

Circle annotations provide:

Shape-Optimized Accuracy – Ideal for round or elliptical objects that bounding boxes can’t outline precisely
Simplified Geometry – Faster annotation with fewer points, maintaining high labeling consistency
Efficient Model Training – Cleaner data for models requiring shape-specific object recognition
Better Visualization – Perfect for use cases where objects have rotational symmetry

Key Features of Our Circle Annotation Tool

Bounding box labeling is the foundation of many AI applications:

Fast, Intuitive Drawing Interface

Simply click and drag to place precise circular annotations.

Auto-Snap and Smart Adjust

Automatically adjust radius and position for better alignment.

Multi-Class Labeling

Assign different class labels to each annotated object.

High-Resolution Zoom Support

Annotate tiny or closely packed circular objects with clarity.

Flexible Export Options

Export annotations in JSON and CSV formats.

Collaborative Workflow Tools

Manage teams, track progress, and ensure consistent labeling across large datasets.

Off the shelf solution

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Solutions

Onboard / Use Any AI Model

Choose the best from the available solutions that suits your business

API Integration

Connect your platform with AI system using API

Go-Live

Go live on production and perform sample checks on intervals

A customized solution for you within weeks

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How It Works

Upload your images, draw circles or ellipses around target objects, assign class labels, review annotations and export structured data for AI and deep learning models.