What is 2D bounding box annotation?

2D bounding box annotation is the process of drawing rectangular boxes around objects in images and labelling each box with the object class. It is the most common annotation type for training object detection AI models including YOLO, Faster R-CNN, and SSD.

How much does bounding box annotation cost in India?

Data Terminal charges ₹2–₹9 per image depending on annotation type: tight bounding box from ₹3/image, loose from ₹2/image, oriented OBB from ₹5/image, and hierarchical from ₹9/image. Volume discounts of 10–30% apply for orders over 1,000 images. Call +91-9014387222 for a custom quote.

What is a good IoU score for bounding box annotation?

Industry standard IoU is 0.85–0.90. Data Terminal delivers an average IoU of 0.995 (99.5%) through a 3-layer QC process. Any box with IoU below 0.98 is automatically flagged for re-annotation before delivery.

How fast can you annotate images?

Standard turnaround is 24–48 hours for up to 10,000 images. Rush same-day delivery is available. For projects over 50,000 images, parallel annotation teams deliver 50,000+ images per day.

What annotation formats do you support?

We deliver in COCO JSON, YOLO TXT, Pascal VOC XML, TFRecord, CSV, and any custom format. If your pipeline requires a specific schema, we build the converter at no extra cost.

Do you offer a free sample?

Yes. Send any 50 images and we will annotate them free within 24 hours, including an IoU accuracy report. No payment, no commitment. Email contact@dataterminal.co or call +91-9014387222.

Can you handle 100,000+ image projects?

Yes. Data Terminal scales to 100,000+ images per project with parallel annotation teams. Our largest project involved 2.1 million annotated frames for an autonomous vehicle client. Contact us for enterprise pricing.

What is oriented bounding box (OBB) annotation?

Oriented bounding box annotation draws rotated rectangles aligned with the object's actual angle, rather than axis-aligned boxes. OBB is used for aerial/satellite imagery and document detection. Data Terminal charges ₹5/image for OBB.

How do you ensure annotation quality?

Our 3-layer QC: (1) Primary annotation by domain-expert annotators, (2) Peer review flagging IoU below 0.98, (3) Automated validation against gold standard images. We report 99.1% Inter-Annotator Agreement (IAA) across all projects.

Which industries do you serve?

Data Terminal provides bounding box annotation for autonomous vehicles, retail/e-commerce, medical imaging, agriculture, manufacturing, and security/surveillance. Each vertical has dedicated annotator teams with domain expertise.

Bounding Box Annotation · India · 2026

2D Bounding Box Annotation Services

99.5% IoU Accuracy · ₹3–₹9 per image · 24-hour turnaround · 50,000+ images/day

India's most accurate 2D bounding box annotation service. Human-verified annotations delivered in COCO JSON, YOLO, Pascal VOC, or any custom format.

Get Free 50-Image Sample Get a Quote

📞 +91-9014387222 · contact@dataterminal.co

annotation-tool · bbox-demo.dataterminal.co

CAR 0.97

PERSON 0.94

TRUCK 0.99

BICYCLE 0.91

99.5%IoU Accuracy

24hTurnaround

₹3–₹9Per Image

50K+Images Per Day

5+Years Experience

What We Annotate

Every Bounding Box Type. One Team.

Tight, loose, oriented, multi-class, hierarchical — expert-annotated with 99.5% IoU, delivered in your format.

Tight Bounding Box

From ₹3/image

Box hugs the object edges tightly. Most common for object detection models.

Object Detection

Loose Bounding Box

From ₹2/image

Slight padding around the object. Used when surrounding context improves model performance.

Context-Aware Models

Oriented (OBB)

From ₹5/image

Rotated rectangle aligned with the object's angle. For aerial, satellite and document imagery.

Aerial / Satellite

Multi-class Annotation

From ₹6/image

Multiple object classes annotated per image. Ideal for complex scene understanding datasets.

Scene Understanding

Hierarchical / Nested

From ₹9/image

Boxes within boxes — car → door → handle. For fine-grained part detection models.

Part Detection

Video Frame Sequence

From ₹8/frame

Frame-by-frame annotation with consistent tracking IDs across the sequence.

Temporal Models

Quality Methodology

How We Hit 99.5% IoU

99.5%

Average IoU Score

Industry Average87%

Data Terminal99.5%

Step 01

Primary Annotation

Expert annotators with domain knowledge — AV, medical, retail, aerial. Assigned by vertical.

Step 02

Peer Review

Second annotator reviews every single box. Any IoU below 0.98 is flagged for re-annotation immediately.

Step 03

Gold Standard Check

5% random sample validated against pre-labelled gold standard images. Batch fails if any box drifts.

Step 04

Automated IoU Validation

Script runs on every completed batch — no box ships below the minimum threshold.

<0.02px

Average Boundary Error

99.1%

Inter-Annotator Agreement

Zero

Missed Objects Post-QC

Pricing Calculator

Get Your Instant Estimate

Transparent pricing — no hidden fees. Volume discounts applied automatically.

Number of Images

1,000 images

1001K10K50K100K+

Annotation Type

Turnaround

Standard 48hBase price

Rush 24h+20%

Same Day+50%

Estimated Cost

₹2,484 – ₹2,916

10% volume discount appliedDelivery by 3 Jul 2026

Get Exact Quote 📞 +91-9014387222

All prices include quality assurance, format conversion, and one revision round. Final price confirmed after reviewing your dataset.

Our Process

Upload to Delivery — 24 Hours

Upload

Share images via secure portal, Google Drive, S3, or FTP. Any format accepted. We sign NDA on request.

Annotate

Expert annotators work in CVAT, Labelbox, or your preferred tool. Domain specialists per vertical.

QC Review

Every image through 3-layer quality control. Any IoU below 0.98 is re-annotated before it moves forward.

Deliver

Receive in COCO JSON, YOLO TXT, Pascal VOC XML, or any custom format. Accuracy report included.

Industries Served

Built for Every Vertical

Dedicated annotation teams per industry — not generalists.

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Autonomous Vehicles

Pedestrian, vehicle, sign and lane detection. Tight bbox + tracking IDs. 50K+ frames/day capacity.

Tight + OBB + Tracking

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Retail & E-commerce

Product detection, shelf monitoring, cashierless checkout. Multi-class at scale.

Multi-class

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Medical Imaging

Tumour localisation, cell detection, surgical instrument tracking. Precision-critical annotation.

Precision Annotation

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Agriculture

Crop disease detection, pest identification, yield estimation from aerial imagery. OBB specialist.

Oriented (OBB)

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Manufacturing

Defect detection, assembly line quality control, robot guidance. High-throughput annotation.

High Volume

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Security & Surveillance

Person, vehicle, and object detection in CCTV footage. Video frame annotation with tracking.

Video Sequence

Formats & Tools

Works With Your Pipeline

Export Formats

COCO JSONYOLO TXTPascal VOC XMLTFRecordCSVCustom

Annotation Tools

CVATLabelboxRoboflowV7SuperAnnotateCustom API

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

Free Sample Offer

Try Before You Commit

Send us 50 images. We'll annotate them free in 24 hours — your annotation type, your format, with an IoU accuracy report. No payment. No commitment.

50 images annotatedAny annotation typeYour formatIoU report included24h delivery

📧 Start Free Sample 📞 +91-9014387222 💬 WhatsApp

FAQ

Frequently Asked Questions

Start Your Project

Ready to Start Your Annotation Project?

Free 50-image sample · Transparent pricing · 24h turnaround · 99.5% IoU guaranteed

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Phone+91-9014387222

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Emailcontact@dataterminal.co

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WhatsAppwa.me/919014387222

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LocationHITEC City, Hyderabad