What is data annotation in AI?

Data annotation is the process of labeling raw data — images, text, audio, video, or 3D point clouds — so that machine learning models can learn from it. Annotated datasets are the foundation of supervised AI training. Without high-quality annotated data, AI models cannot achieve reliable accuracy.

What types of data annotation services does Data Terminal offer?

Data Terminal offers image annotation (bounding boxes, semantic segmentation, polygon, keypoints), video annotation (object tracking, activity recognition), text annotation (NER, sentiment, intent classification), audio annotation (transcription, speaker diarization, emotion tagging), LiDAR/3D point cloud annotation, document annotation (OCR correction, invoice parsing, form extraction), and RLHF (reinforcement learning from human feedback) for large language models.

What is the difference between data labeling and data annotation?

Data labeling assigns a single tag or category to a data item (e.g., 'cat' or 'dog'). Data annotation is broader — it includes labeling but also adds contextual metadata such as bounding boxes, segmentation masks, timestamps, relationships, and attributes. All labeling is annotation, but not all annotation is mere labeling.

How do you ensure quality in data annotation?

Data Terminal uses a multi-pass quality assurance process: custom annotation guidelines per project, pilot batch review, inter-annotator agreement (IAA) scoring, two-tier human review, automated consistency checks, and client feedback loops. We maintain 99.5% accuracy across projects.

What annotation output formats do you support?

We support all major annotation formats including COCO JSON, Pascal VOC XML, YOLO TXT, CVAT XML, Labelbox JSON, custom JSON/JSONL, and CSV. We can also deliver in any client-specified format.

How long does a data annotation project take?

Standard projects are delivered within 48–72 hours for small batches (up to 5,000 items). Large-scale projects (100,000+ items) are scoped with a dedicated timeline. Rush delivery is available for urgent AI training requirements.

Can Data Terminal handle large-scale data annotation projects?

Yes. Data Terminal has handled projects exceeding 50 million annotations. We scale annotation teams on demand for high-volume requirements, with dedicated project managers and continuous quality monitoring.

Why choose India for data annotation services?

India offers a large pool of English-proficient, technically trained annotators at cost-effective rates — typically 60–70% lower than US or European providers — without compromising on accuracy. Indian annotation teams are experienced in medical, legal, automotive, and NLP domains.

What industries does Data Terminal serve with data annotation?

Data Terminal serves autonomous vehicles, healthcare AI (medical imaging), e-commerce, agriculture, robotics, content moderation, satellite/geospatial imaging, legal/finance NLP, retail, and conversational AI (chatbots, virtual assistants).

What annotation tools does Data Terminal use?

We work with CVAT, Labelbox, Scale AI-compatible pipelines, Roboflow, VGG Image Annotator (VIA), and custom in-house annotation tools. We can integrate with your existing annotation platform or provide a fully managed environment.

What is video annotation?

Video annotation is the process of labeling objects, actions, and events in video footage frame-by-frame so AI models can learn to understand temporal visual data. It includes object tracking with consistent IDs, activity recognition, temporal segmentation, and pose estimation. Data Terminal delivers 99.2% tracking accuracy at 50,000+ frames per day.

How is video annotation different from image annotation?

Video annotation adds a temporal dimension — objects must be tracked consistently across frames with stable IDs, and actions/events must be labeled over time ranges. This is fundamentally harder than image annotation because it requires temporal consistency, not just per-frame accuracy.

What types of video annotation does Data Terminal offer?

Data Terminal offers object tracking (with consistent frame IDs), activity and action recognition, frame-level classification, temporal event segmentation, human pose estimation across frames, and custom event detection for surveillance, sports, and robotics.

How much does video annotation cost?

Video annotation costs depend on annotation type: basic object tracking starts at ₹5–₹8 per frame. Complex multi-class tracking with activity labels is ₹12–₹20 per frame. Data Terminal offers volume pricing for projects over 10,000 frames.

What is object tracking annotation?

Object tracking annotation assigns consistent IDs to objects across every frame of a video so AI models learn to follow moving objects over time. Each tracked object gets a unique ID that persists from its first to last appearance. This is critical for autonomous vehicles, surveillance AI, and sports analytics.

How fast can you annotate video data?

Data Terminal annotates 50,000+ frames per day using parallel annotation teams. Standard turnaround for a 1-hour video (at 30fps = 108,000 frames) is 3–5 business days. Rush delivery is available for urgent projects.

What output formats do you support for video annotation?

We deliver in CVAT XML, COCO Video JSON, MOT Challenge format, custom JSON with frame/timestamp/trackID structure, and any client-specified schema. We can also output tracking data as CSV or integrate directly with your annotation platform.

Which industries use video annotation services?

Autonomous vehicles (dashcam/traffic footage), sports analytics (player tracking, action recognition), security and surveillance (intrusion detection, crowd monitoring), robotics (manipulation training), AR/VR, healthcare (surgical video), and entertainment (visual effects, content moderation).

Video Annotation · India · 2026

Video Annotation Services in India

99.2% Accuracy · ₹8–₹25 per minute · 24-hour turnaround · 10,000+ hours/month

India's most precise video annotation service. Expert-annotated object tracking, temporal segmentation and action recognition labels for autonomous driving, surveillance and sports AI.

Get Free Sample Annotation Get a Quote

📞 +91-9014387222 · contact@dataterminal.co

annotation-tool · video.dataterminal.co

FRAME 0047 · 00:01.56

VEHICLE #001 0.98

PERSON #002 0.95

TRUCK #003 0.99

0:47 / 1:52

99.2%Tracking Accuracy

24hTurnaround

₹8–₹25Per Minute

10K+Hours/Month

5+Years Experience

What We Annotate

Every Video Annotation Type. One Team.

Tracking, segmentation, action recognition — expert-annotated at 99.2% accuracy, delivered in your format.

Object Tracking

From ₹8/min

Consistent tracking IDs across every frame. Handles occlusion, re-identification, and multi-object scenes.

Temporal Detection

Temporal Segmentation

From ₹15/min

Pixel-level masks maintained across frames. For semantic video segmentation and scene parsing models.

Video Segmentation

Action Recognition

From ₹12/min

Clip-level and frame-level action labels. Walking, running, gesturing — for activity detection models.

Activity AI

Optical Flow

From ₹20/min

Per-pixel motion vectors between frames. Used for flow-based video understanding and compression AI.

Motion Vectors

Scene Classification

From ₹5/min

Whole-clip and shot-level scene labels. Indoor/outdoor, day/night, environment type classification.

Scene Understanding

Event / Anomaly Detection

From ₹18/min

Timestamp-precise labeling of events, incidents, and anomalies in surveillance and industrial footage.

Surveillance AI

Quality Methodology

How We Hit 99.2% Tracking Accuracy

99.2%

Tracking Accuracy Score

Industry Average83%

Data Terminal99.2%

Step 01

Domain Expert Annotators

Video annotators assigned by vertical. AV specialists handle autonomous driving. Security specialists handle CCTV footage.

Step 02

Frame-by-Frame ID Review

Second annotator checks every 10th frame for ID consistency. Tracking drift flagged immediately for re-annotation.

Step 03

Temporal Gold Standard

Sample clips validated against pre-annotated gold sequences. Batch fails if tracking accuracy drops below threshold.

Step 04

Automated Tracking Validation

Script checks ID continuity, occlusion handling, and re-identification quality across every delivered clip.

99.2%

Tracking Accuracy

99.1%

ID Consistency Rate

Zero

ID Swaps Post-QC

Our Process

Upload to Delivery — 24 Hours

Upload

Share video via secure portal, Google Drive, S3, or FTP. MP4, AVI, MOV, MKV, or image sequence. NDA signed on request.

Annotate

Frame-by-frame annotation in CVAT Video, Labelbox, or your preferred tool. Domain specialists per vertical.

QC Review

ID consistency check every 10 frames. Occlusion and re-ID validated. Any drift re-annotated before delivery.

Deliver

COCO + tracking JSON, MOT format, nuScenes, or custom schema. Full accuracy report included.

Industries Served

Built for Every Vertical

Dedicated annotation teams per industry — not generalists.

🚗

Autonomous Vehicles

Multi-object tracking, pedestrian/cyclist detection. Consistent IDs across 100+ frames. KITTI/nuScenes output.

Object Tracking

🔒

Security & Surveillance

Person re-ID, crowd analytics, vehicle tracking in CCTV footage. 24/7 annotation teams for high-volume streams.

Event Detection

⚽

Sports Analytics

Player tracking, ball detection, action recognition, tactical analysis. Multi-camera synchronised annotation.

Action Recognition

📺

Media & Broadcasting

Shot detection, scene segmentation, logo/brand tracking. Content classification at scale for streaming platforms.

Scene Classification

🏥

Healthcare / Medical

Surgical instrument tracking, endoscopy video annotation, rehabilitation motion analysis.

Precision Tracking

🤖

Robotics

Object manipulation tracking, workspace monitoring, human-robot interaction labeling for cobot training.

Motion Analysis

Formats & Tools

Works With Your Pipeline

Export Formats

COCO JSON + TrackingMOT ChallengenuScenes JSONWaymo TFRecordCustom CSVKITTI

Annotation Tools

CVAT VideoLabelbox VideoScale AI VideoSuperviselyDarwinAICustom Pipeline

If your pipeline requires a specific format or tool integration, we build the connector at no extra cost.

Free Sample Offer

Try Before You Commit

Send us 5 minutes of footage. We'll annotate it free in 24 hours — your annotation type, your format, with an accuracy report. No payment. No commitment.

5 min annotated freeAny annotation typeYour output formatAccuracy report24h delivery

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Frequently Asked Questions

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Let's Build Something Great.

Free sample on your first project. Response in under 2 hours. Transparent pricing with no hidden costs.

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Phone+91-9014387222

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Emailcontact@dataterminal.co

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LocationHITEC City, Hyderabad, India

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