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--- |
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pipeline_tag: image-to-text |
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tags: |
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- NPU |
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--- |
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# PaddleOCR v4 (PP-OCRv4) for Android |
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## Quickstart |
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See [Documentation](https://docs.nexa.ai/nexa-sdk-android/quickstart) |
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## Model Description |
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**PP-OCRv4** is the fourth-generation end-to-end optical character recognition system from the PaddlePaddle team. |
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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. |
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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. |
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## Features |
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- **End-to-end OCR**: text detection, optional angle classification, and text recognition in one pipeline. |
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- **Multilingual support**: pretrained models for English, Chinese, and dozens of other languages; easy finetuning for domain text. |
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- **Robust in real-world conditions**: handles rotation, perspective distortion, blur, low light, and complex backgrounds. |
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- **Lightweight & fast**: practical for both mobile apps and large-scale server deployments. |
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- **Flexible I/O**: works with photos, scans, screenshots, receipts, invoices, ID cards, dashboards, and UI text. |
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- **Extensible**: swap components (detector/recognizer), add language packs, or finetune on domain datasets. |
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## Use Cases |
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- Document digitization (invoices, receipts, forms, contracts) |
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- RPA and back-office automation (screen/OCR flows) |
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- Mobile scanning apps and camera-based translation/read-aloud |
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- Industrial and retail analytics (labels, price tags, shelf tags) |
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- Accessibility (screen-readers and read-aloud applications) |
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## Inputs and Outputs |
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**Input**: Image (photo, scan, or screenshot). |
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**Output**: A list of detected text regions, each with: |
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- bounding box (rectangular or polygonal) |
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- recognized text string |
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- optional confidence score and orientation |
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## License |
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This model is released under the **Creative Commons Attribution–NonCommercial 4.0 (CC BY-NC 4.0)** license. |
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Non-commercial use, modification, and redistribution are permitted with attribution. |
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For commercial licensing, please contact **dev@nexa.ai**. |
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## References |
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- GitHub repo: [https://github.com/PaddlePaddle/PaddleOCR](https://github.com/PaddlePaddle/PaddleOCR) |
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- Model zoo & documentation: [Models list](https://github.com/PaddlePaddle/PaddleOCR/blob/release/2.7/doc/doc_en/models_list_en.md) |
