---
pipeline_tag: image-to-text
tags:
- NPU
---
# PaddleOCR v4 (PP-OCRv4) for Android

## Quickstart

See [Documentation](https://docs.nexa.ai/nexa-sdk-android/quickstart)

## Model Description
**PP-OCRv4** is the fourth-generation end-to-end optical character recognition system from the PaddlePaddle team.  
It combines a lightweight **text detection → angle classification → text recognition** pipeline with improved training techniques and data augmentation, delivering higher accuracy and robustness while staying efficient for real-time use.

PP-OCRv4 supports multilingual OCR (Latin and non-Latin scripts), irregular layouts (rotated/curved text), and challenging inputs such as noisy or low-resolution images often found in mobile and document-scan scenarios.

## Features
- **End-to-end OCR**: text detection, optional angle classification, and text recognition in one pipeline.
- **Multilingual support**: pretrained models for English, Chinese, and dozens of other languages; easy finetuning for domain text.
- **Robust in real-world conditions**: handles rotation, perspective distortion, blur, low light, and complex backgrounds.
- **Lightweight & fast**: practical for both mobile apps and large-scale server deployments.
- **Flexible I/O**: works with photos, scans, screenshots, receipts, invoices, ID cards, dashboards, and UI text.
- **Extensible**: swap components (detector/recognizer), add language packs, or finetune on domain datasets.

## Use Cases
- Document digitization (invoices, receipts, forms, contracts)
- RPA and back-office automation (screen/OCR flows)
- Mobile scanning apps and camera-based translation/read-aloud
- Industrial and retail analytics (labels, price tags, shelf tags)
- Accessibility (screen-readers and read-aloud applications)

## Inputs and Outputs
**Input**: Image (photo, scan, or screenshot).  
**Output**: A list of detected text regions, each with:
- bounding box (rectangular or polygonal)
- recognized text string
- optional confidence score and orientation


## License  
This model is released under the **Creative Commons Attribution–NonCommercial 4.0 (CC BY-NC 4.0)** license.  
Non-commercial use, modification, and redistribution are permitted with attribution.  
For commercial licensing, please contact **dev@nexa.ai**.

## References
- GitHub repo: [https://github.com/PaddlePaddle/PaddleOCR](https://github.com/PaddlePaddle/PaddleOCR)  
- Model zoo & documentation: [Models list](https://github.com/PaddlePaddle/PaddleOCR/blob/release/2.7/doc/doc_en/models_list_en.md)