Outsource Image Annotation Services

Get high-quality image datasets for object detection, localization, and segmentation purposes

Image labeling & tagging services for diverse AI/ML projects

Enterprises need a continuous flow of accurately labeled datasets to train computer vision models. Generating such a dataset requires proper tools, experience, strict adherence to quality parameters, and compliance with data privacy laws. However, companies often fail to establish and manage such an infrastructure with the right technologies and resources within their budget.

At SunTec Data, we help you quickly build a reliable data pipeline through precise image annotation services. We meet all short and long-term data volume requirements through a dedicated team, advanced tools, and the latest technologies. To guarantee accuracy and data security, we employ multi-layer QA and double-pass annotation methodologies. Regardless of the project's complexity, we align our teams to deliver within deadlines.

Here’s what we offer when you outsource 2D and 3D image annotation services to our team.

  • Data collection from authorized sources
  • Data annotation with speed and precision
  • Quality analysis and dataset delivery within deadlines

Case study

Data annotation for a face recognition algorithm

The client (An AI-based solutions development company) needed a labeled dataset for its face recognition algorithm. They provided a database of facial images, including obscured and poorly visible photos. We omitted unusable photos from the dataset and tagged and categorized the rest as per client instructions. We delivered 1000+ annotated images within two weeks with 99% accuracy.

Experienced resource

Subject matter experts and customized project workflows

Our guarantee of precision and quality in annotated datasets are backed by a dedicated team of data annotators and image labeling experts with rich experience and background in this domain. Additionally, we also offer a customizable workflow so that the final result can be aligned with your expectations and the scope for errors is minimized.

Client's speak

"They are responsive, proactive, and extremely knowledgeable about their services."

We decided to go with SunTec Data because of their reputation in providing accurate, reliable annotation and training datasets. It is a pleasure to be working with this team. They are responsive, proactive, and extremely knowledgeable about their services.

David Smith, Entrepreneur, USA

Our wide range of image labeling services

Bounding boxes

Bounding box annotation is a cost-efficient way to teach computer vision models where objects are located within an image, commonly used for detecting lane boundaries, stop signs, and pedestrians. We annotate images using rectangular boxes around target objects. This leads to accurate object detection for 2D images and helps extract training data according to the nature of your AI/ML models.

3D cuboid annotation

In 3D cuboid annotation, a cube is drawn around an object to read its height, width, and depth. Our experts use the cuboid annotation technique to classify 3D objects in indoor and outdoor environments, like images of moving traffic, pedestrians, and road signs.

Polygon/Contour annotation

This approach is useful for annotating target objects by plotting points on each vertex. Polygon annotation marks the exact borders of the object, regardless of its shape or size. We commonly use this technique to label road sign boards, human postures, and movements, and for mapping and analysis purposes.

Semantic segmentation

Using semantic segmentation, we break an image into different segments through pixel-level classification and annotate them with information. For instance, in an image of moving traffic, we use semantic segmentation to identify classes like vehicles, humans, animals, road signs, etc.

LiDAR annotation

LiDAR data comprises thousands of measurement points in the entire area. Through LiDAR annotation, we convert complex 3D data into training datasets for AI/ML models.

Keypoint annotation

Also known as landmark annotation, we use this approach to annotate facial expressions, skeletal features, and movements of a human body. The process helps to generate optical flow representations of ground data and annotate key points around the chosen area in a 2D image/video frame.

Line and polyline annotation

Our experts draw precise lines to recognize different paths, orientations, and surfaces. The resultant dataset helps train a computer vision model to analyze terrain and structures by highlighting linear structures within image data.

We provide image annotation services for diverse industries and use cases

Using our data annotation and labeling services, you can achieve a wide range of use cases for an AI/ML model. Here are a few of them where our team can support you.

Autonomous cars

We create high-quality datasets to help self-driving cars better understand their environment by annotating their surroundings with bounding boxes.


Our medical data annotation experts annotate scanned medical images to help ML models in several purposes, like automated diagnosis, surgery assistance, and sample scanning.


We provide 2D and 3D image annotation for your trained model to identify the health of crops. These insights help reduce the cost of crop management.


Our image annotation services can help you develop best-in-class inventory management tools, chatbots, and product recommendation engines, among other AI-based eCommerce applications.


With accurate training datasets created by labeling barcodes, QR codes, and other logistics and supply chain data, we can help you improve process efficiency and accuracy.

Aerial & drone images

We annotate drone-captured images to provide accurate datasets for object detection, road mapping, terrain detection, and such other applications.

Our image annotation workflow

We strive to closely and clearly understand your requirements to produce the most reliable output. Our annotation process includes the following steps:

1. Requirement analysis

Share your data sample and the annotation and file formatting requirements so we can establish the project scope.

2. Preparing image dataset

Our team prepares the databases by eliminating unusable elements, like obscured images.

3. Image labeling

Images are annotated using labeling techniques like semantic segmentation, bounding boxes, and polyline, as required.

4. Export and formatting

We convert annotated image assets into the specified format for delivery.

5. Accuracy and quality check

Each photo goes through strict QC rounds to ensure accuracy and adherence to your expectations.

6. Project delivery

After the quality check, the annotated dataset is delivered to you through secure measures.

Why outsource image annotation services to SunTec Data?

Reduce your workload and save time by outsourcing image annotation to our experts. When you partner with us, you have access to a host of benefits, including the following.

Data security

SunTec Data is a leading provider of reliable and secure hosting solutions. Our data security measures are certified by the international standard ISO/IEC 27001:2013. Rest assured that our high level of protection will keep your data safe and secure.

Advanced infrastructure

We've built a high-tech, customized solution to create image annotations and established a state-of-the-art infrastructure to speed up the annotation process.

Free sample

Reach out to us to get a few image samples annotated for free. We can also ensure that your images won't be reused through NDA-supported samples.

Rigorous quality check

We are committed to continually assessing the quality of our deliverables and always delivering on your requirements.

Quick turnaround time

We are equipped to ensure quick turnaround time and adhere to the delivery schedule, regardless of the project's complexity.

Scalable workforce

You can easily increase the assigned number of images for annotation and our team will handle the add-on without impacting the outcome or schedule.

Cost-effective services

We offer cost-effective, high-quality image annotation services with an opportunity to save as much as 50-60%.

Get reliable image labeling services in a short turnaround time

Leverage our experience of 20+ years as an outsourcing support company. We tailor our workflow to meet your needs while keeping your data secure from leaks and other vulnerabilities. Our team ensures the best possible outcome in terms of quality, speed, and budget.

Reach out to us at info@suntecdata.com to discuss your requirements or get a free sample.


Annotating images requires advanced tools and experts to create accurate training datasets for your machine-learning models. Outsourcing helps your business achieve a competitive edge by freeing your staff's time and giving you access to the desired results. And best of all, it costs less to outsource image annotation than to establish an in-house team.

We are ISO/IEC 27001:2013 certified for information security and ISO 9001:2015 certified for quality management. We maintain the highest level of security to ensure your data remains protected with us.

You can start by sending us your requirements for the demo project, and our annotators will provide you with a training dataset. Once you access our workflow, our experts will inform you of the detailed price structure per your requirements.

To provide high-quality datasets for AI/ML models, we offer image annotation techniques like bounding boxes, 3D cuboids, LiDAR, semantic segmentation, keypoint/landmark annotation, and polyline annotation.

Our highly-accurate 2D and 3D image tagging services encompass a multitude of subclasses such as Polylines, Semantic, Key Points, and Bounding boxes. We clean the client’s databases (removing obscure images with poor visibility), annotate the dataset using the best techniques, and deliver it after thorough quality checks.

We meet the deadline without sacrificing quality. Contact us for a close estimate of the turnaround time.

Yes, we provide a free demo, allowing you to try out the convenience of tagging your photos before you invest in this valid service. After we have selected a few photographs, our experts will annotate them according to your demands. Furthermore, we guarantee that your photographs are safe and that the information is not sold or otherwise exploited commercially by us.