2D Image Annotation Services

Sama’s high-quality image annotation solutions using advanced object detection, semantic segmentation, and tracking capabilities meet your most complex ML model requirements.

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25% of Fortune 50 companies trust Sama to help them deliver industry-leading ML models

Sama Image Annotation Services Provide Quality At Scale

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Sama provides the technical expertise and industry knowledge to deliver high–quality image tagging and annotation services at scale. Our proprietary algorithms and Humans-in-the-Loop approach combine to offer unmatched accuracy.

We guarantee a 95% acceptance rate – in writing and support a monthly annotation volume up of up to:

  • 300 million frames
  • 850 million shapes
  • 10 billion annotation points

2D Image Annotation Solutions

Sama delivers best-in-class video annotation services for the most complex and demanding machine learning models.

Detect and define the location of your target objects. Our video annotation experts use bounding boxes to accurately segment videos used for a variety of applications including autonomous driving, food system optimization, and more. Bounding boxes are best used for object tracking and object detection.

  • Achieve accurate placement with just two clicks with crosshair lines
  • Use state tracking for occlusion, truncation and overlapping objects
  • Create custom classes, multiple attributes per instance, and hierarchical relationships
  • Power up your object tracking with ML Assist for faster high-quality annotations
  • Use ML-assisted or linear interpolation between frames
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people detection

Localize and detect complex objects with precision.

Polygons are used as part of our video annotation solutions to improve the accuracy of object detection algorithms. They are best used for applications when a more precise definition of an object’s boundaries are needed such as vehicle detection, crop identification and more.

  • Apply ML-assisted annotation for polygon for auto-annotation
  • Use grouping and layering for similar objects
  • Engage quick editing tools for adding and removing points
  • Create custom classes, multiple attributes per instance, and hierarchical relationships
  • Utilize linear interpolation between frames
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Easily detect and annotate pose variations.

Keypoints are a video annotation technique that our team uses to capture the location and orientation of landmarks within a video. Keypoints are best for motion tracking, facial landmark detection and hand gesture recognition as they track the movement of individual objects.

  • Configure any custom keypoint shape including skeletons, hands, and eyes in a repeatable pattern for consistent results
  • Landmark important features using points
  • Get support for custom classes, multiple attributes per instance, and hierarchical relationships
  • Utilize linear interpolation between frames
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Annotate straight or curved objects with precision.

Lines and arrows are used in 2D video annotation to highlight important features in a video for object tracking or scene understanding. This is useful for understanding things like lane marking and traffic patterns or identifying buildings in a city.

  • Outline object boundaries with lines for clear edge identification
  • Highlight directional indicators with arrows
  • Get support for custom classes, multiple attributes per instance, and hierarchical relationships
  • Utilize linear interpolation between frames
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line arrows

Detect the depth and height of your object of interest for vehicle and pedestrian identification, robotic movement, and interior furniture placement.

  • Apply cuboids in both 2D & 3D for a variety of mixed applications
  • Enable highly accurate 2D cuboids in just three clicks via our multi-click technology
  • Get support for custom classes, multiple attributes per instance, and hierarchical relationships
  • Utilize linear interpolation between frames
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people detection

What Sama Image Annotation Offers

Easy Integrations

Get started quickly by easily integrating our image annotation platform with APIs, CLIs and webhooks that plug directly into your environment. The Sama API enables you to programmatically query the status of projects, post new tasks to be done, receive results automatically and more.

Comprehensive Shape Support

Our solutions provide a wide range of annotations including bounding boxes, polygons, keypoints & points, segmentations, lines and arrows, and cuboids.

Accurate and Efficient Annotation

Sama achieves 300+% productivity gains with our ML-assisted models, allowing us to achieve high-quality at scale. Our advanced image annotation solutions include ML-assisted annotation, crosshair tool, visual feedback on label selection, logically grouped tasks, keyboard shortcuts, and more.

Full Spectrum Labeling

Get results tailored to your exact requirements with custom classes, multiple attributes per instance, and hierarchical relationships.


Categorize scene level attributes with ease for indicating weather conditions, environment type, and activity identification.


Image Annotation Use Cases

Sama’s image annotation experts improve ML model performance by delivering annotations with unmatched accuracy and speed.

vehicle detection

Lane Identification

Sama experts deploy polyline annotation to produce training data that instruct machine learning models to recognize specific space parameters in which they operate.



Annotators connect the dots across the human body to establish a relationship between points, like from shoulder to elbow to wrist. This helps models recognize human postures and movements, which is of particular value to AR/VR applications.

object detection

Scene Segmentation

Our team segments images into individual pixels so that every single pixel in an image is categorized into a class. Because of the extremely high level of detail captured by scene segmentation, it is of most value to high-risk and high-value use cases.

furniture and objects detection

Instance Segmentation

Instance segmentation is an advanced image annotation technique. A combination of object detection and semantic segmentation, objects are classified by more than one category, while also identified as unique objects. The layering of more fine-grained details improves object recognition.

vehicle detection

Scene Categorization

Categorization provides environmental or other context for specific scenes in order to train models to identify and classify images.


2D Video Annotation Process

Sama’s video annotation projects start with tailored consultations, assessing tagging needs via knowledgeable solutions engineers. After evaluating alternatives, projects launch on Sama’s cutting-edge video annotation platform.


For our video annotation services, we employ an integrated calibration process to maximize efficiency and value. In the initial session, we establish clear instructions, address edge cases, and align on key metrics. Subsequent collaborative meetings with a project manager, solutions engineer, and QA agent, whether weekly or monthly, ensure quality scaling as you utilize our services.


Each project is assigned to a dedicated team at Sama, consisting of internal experts with deep industry knowledge – avoiding consultants, contractors, or crowdsourcing. These teams undergo project-specific training, ensuring their effectiveness from the outset. This methodology extends to our video annotation services, where specialized training empowers our teams to excel in handling video training data right from the start.


Sama continually enhances its video annotation solutions through iterative feedback, with a focus on shaping and refining annotations using a video annotation tool. We utilize level feedback, percentage of data set review, and automated scoring, bolstered by real-time analytics that offer immediate actionable insights. Should data accuracy not meet client expectations, we provide complimentary rework services for the project.


Sama’s video annotation services offer flexible and customizable delivery formats for key metric reports and evaluations within its image annotation service. This is complemented by robust quality control measures to reduce inaccuracies swiftly, ensuring the rapid deployment of ML models.


First batch client acceptance rate across 10B points per month


Get models to market 3x faster by eliminating delays, missed deadlines and excessive rework


Lives impacted to date thanks to our purpose-driven business model


Experts in Complex Workflows Across Industries


Why Choose Sama

Sama delivers not only accurate video annotation, but insights and recommendations via our vertically integrated platform combined with human-in-the-loop experts, all while embracing an ethical AI approach. This is why companies come to us when other video annotation solutions fail.


No matter how complex your models, we consistently deliver a 99% client acceptance rate as you scale, even with high ambiguity images and edge cases.

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Industry Experience

Sama has over 15 years of experience and our annotators have an average tenure of 2+ years.  Vertically segmented teams provide expertise into industry nuances.

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Ethical AI

As the first AI certified B Corp, Sama has provided economic opportunities for over 65,000 employees from underserved communities.

Read the MIT RCT Study

Data Security

ISO certified delivery centers, a biometric secured platform and our in-house workforce help protect your data from unauthorized access and data corruption from ingestion to delivery.

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Frequently Asked Questions

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