| --- |
| license: apache-2.0 |
| tags: |
| - onnx |
| - paddleocr |
| - ocr |
| - text-detection |
| - text-recognition |
| pipeline_tag: image-to-text |
| library_name: onnxruntime |
| --- |
| |
| # PaddleOCR ONNX Models |
|
|
| Pre-converted PaddleOCR models in ONNX format for use with [Kreuzberg](https://github.com/Kreuzberg-dev/kreuzberg). |
|
|
| ## Models |
|
|
| | File | Type | Version | Size | Description | |
| |------|------|---------|------|-------------| |
| | `ch_PP-OCRv4_det_infer.onnx` | Detection | PP-OCRv4 | 4.5 MB | Text region detection (language-agnostic) | |
| | `ch_ppocr_mobile_v2.0_cls_infer.onnx` | Classification | PPOCRv2 | 572 KB | Text angle classification (0° vs 180°) | |
| | `en_PP-OCRv4_rec_infer.onnx` | Recognition | PP-OCRv4 | 7.3 MB | English text recognition | |
|
|
| ## Pipeline |
|
|
| PaddleOCR uses a three-stage pipeline: |
|
|
| 1. **Detection** (`det`): Locates text regions in the image using a DB (Differentiable Binarization) network. The detection model is language-agnostic — it identifies bounding boxes around text regardless of script. |
| 2. **Classification** (`cls`): Determines text orientation (upright vs upside-down) to correct rotated text before recognition. |
| 3. **Recognition** (`rec`): Reads characters from each detected text region. This is the only language-specific model. |
|
|
| ## Sources & Credits |
|
|
| These models are derived from [PaddlePaddle/PaddleOCR](https://github.com/PaddlePaddle/PaddleOCR), licensed under Apache 2.0. |
|
|
| - **Detection model** (`ch_PP-OCRv4_det_infer.onnx`): Pre-converted ONNX model sourced from [SWHL/RapidOCR](https://huggingface.co/SWHL/RapidOCR) on HuggingFace (PP-OCRv4 folder). Originally trained by PaddlePaddle as `ch_PP-OCRv4_det_infer`. |
| - **Classification model** (`ch_ppocr_mobile_v2.0_cls_infer.onnx`): Pre-converted ONNX model sourced from [SWHL/RapidOCR](https://huggingface.co/SWHL/RapidOCR) on HuggingFace (PP-OCRv1 folder). Originally trained by PaddlePaddle as `ch_ppocr_mobile_v2.0_cls_infer`. |
| - **Recognition model** (`en_PP-OCRv4_rec_infer.onnx`): Converted from PaddlePaddle format to ONNX using [paddle2onnx](https://github.com/PaddlePaddle/Paddle2ONNX) (opset 14). Original PaddlePaddle model downloaded from PaddlePaddle's official distribution (`en_PP-OCRv4_rec_infer`). |
|
|
| ## Acknowledgments |
|
|
| - [PaddlePaddle](https://github.com/PaddlePaddle) for creating and training the PP-OCR model series |
| - [SWHL/RapidOCR](https://github.com/RapidAI/RapidOCR) for maintaining pre-converted ONNX models |
| - [Paddle2ONNX](https://github.com/PaddlePaddle/Paddle2ONNX) for the PaddlePaddle-to-ONNX conversion tool |
|
|
| ## License |
|
|
| The original PaddleOCR models are licensed under [Apache License 2.0](https://github.com/PaddlePaddle/PaddleOCR/blob/main/LICENSE). |
|
|
