Text and OCR annotation

Text & OCR Annotation

Text annotation is the process of labelling or tagging information to any of the text formats such as documents, records, files, cheques, order receipts etc. Highly accurate text annotation is required in order to train large NLP models.

Given below is an overview of various types of text annotations:

  • Entity Annotation - It is a process of locating, extracting and labelling named entities (NER), phrases (Key phrase tagging) and functional elements of speech (POS tagging)
  • Entity Linking - Entity linking deals with relating the named entities based on the connections between them. It gives additional information about the entities.
  • Text Classification - Text classification assigns a single label to the entire text based on content. It helps to know what the entire text is about.
  • Sentiment Annotation - When a model is being trained, sarcastic content makes it more difficult to understand the text's emotions. Aiding computers to understand emotions is challenging and annotation plays a significant role in accomplishing it.
  • Intent Analysis - It is a way of analyzing the reason or intention behind the text, which aids in understanding customer desires.

Image given above illustrates a text which is annotated with entities measurement, city, year, metal capital and country .

What is OCR?

OCR stands for Optical Character Recognition. In images that cannot be edited, such as scanned copies of bills, orders, handwritten scripts, bank accounts, etc, this method of text recognition is used. OCR is the process of converting the text in images to machine readable format.

OCR annotation has its scope in a wide range of sectors. Here, the image illustrates OCR annotation being used in Number plate recognition.

At HaiData, we offer a variety of text annotation services, at scale, that suits your NLP model requirements. Contact Us today for a free sample annotation!

Where Text & OCR Annotation Is Used

High-quality text and OCR annotation underpins a wide range of natural language processing and document intelligence systems. Common application areas include:

  • Large language model training - curated, labeled text corpora for instruction tuning, classification and information extraction.
  • Document processing and OCR - digitizing invoices, receipts, bank statements, forms and handwritten records into machine-readable text.
  • Named entity recognition - tagging people, places, organizations, dates and domain terms for search and analytics.
  • Sentiment and intent analysis - labeling customer feedback, reviews and support conversations to power chat assistants.
  • Healthcare and finance text - structured extraction from clinical notes and financial documents. See our medical NER annotation guide.

Why HaiData for Text & OCR Annotation

  • Own platform - annotation runs on our in-house HaiCrowd platform (own-cloud) with native iOS and Android apps.
  • Multi-layer quality control - multiple levels of human review combined with automated QC checks, targeting 99% accuracy.
  • Consent-first and privacy-aware - GDPR-aligned handling aligned with India's DPDP Act 2023; ISO 27001 certification is in progress (expected 2026).
  • Flexible delivery - labeled datasets can be delivered to your own cloud storage in the formats your pipeline needs.
  • Trusted background - NVIDIA Inception Program member and GoodFirms-recognized, based in India and serving clients worldwide.

Explore our broader data annotation services and humans-in-the-loop services for end-to-end model support.

Frequently Asked Questions

We cover named entity recognition, entity linking, text classification, sentiment and intent annotation, and optical character recognition (OCR) for scanned and handwritten documents.

We target 99% accuracy through multiple levels of human review supported by automated quality control checks.

We follow consent-first, GDPR-aligned data handling aligned with India's DPDP Act 2023, and our ISO 27001 certification is in progress (expected 2026). Work runs on our own HaiCrowd platform.

We deliver labeled text in the formats your pipeline requires and can send datasets directly to your own cloud storage.

Yes. Our HaiCrowd platform and flexible engagement model scale with your project, from pilots to large, ongoing programs.

Ready to start? Contact us for a free sample annotation, or see the top data annotation companies in India.