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---
library_name: pytorch
license: other
tags:
- android
pipeline_tag: image-to-text
---
![](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/trocr/web-assets/model_demo.png)
# TrOCR: Optimized for Qualcomm Devices
End-to-end text recognition approach with pre-trained image transformer and text transformer models for both image understanding and wordpiece-level text generation.
This is based on the implementation of TrOCR found [here](https://huggingface.co/microsoft/trocr-small-stage1).
This repository contains pre-exported model files optimized for Qualcomm® devices. You can use the [Qualcomm® AI Hub Models](https://github.com/qualcomm/ai-hub-models/blob/v0.60.0/src/qai_hub_models/models/trocr) library to export with custom configurations. More details on model performance across various devices, can be found [here](#performance-summary).
Qualcomm AI Hub Models uses [Qualcomm AI Hub Workbench](https://workbench.aihub.qualcomm.com) to compile, profile, and evaluate this model. [Sign up](https://myaccount.qualcomm.com/signup) to run these models on a hosted Qualcomm® device.
## Getting Started
There are two ways to deploy this model on your device:
### Option 1: Download Pre-Exported Models
Below are pre-exported model assets ready for deployment.
| Runtime | Precision | Chipset | SDK Versions | Download |
|---|---|---|---|---|
| ONNX | float | Universal | QAIRT 2.45, ONNX Runtime 1.27.1 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/trocr/releases/v0.60.0/trocr-onnx-float.zip)
| QNN_DLC | float | Universal | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/trocr/releases/v0.60.0/trocr-qnn_dlc-float.zip)
| TFLITE | float | Universal | QAIRT 2.45 | [Download](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/trocr/releases/v0.60.0/trocr-tflite-float.zip)
For more device-specific assets and performance metrics, visit **[TrOCR on Qualcomm® AI Hub](https://aihub.qualcomm.com/models/trocr)**.
### Option 2: Export with Custom Configurations
Use the [Qualcomm® AI Hub Models](https://github.com/qualcomm/ai-hub-models/blob/v0.60.0/src/qai_hub_models/models/trocr) Python library to compile and export the model with your own:
- Custom weights (e.g., fine-tuned checkpoints)
- Custom input shapes
- Target device and runtime configurations
This option is ideal if you need to customize the model beyond the default configuration provided here.
See our repository for [TrOCR on GitHub](https://github.com/qualcomm/ai-hub-models/blob/v0.60.0/src/qai_hub_models/models/trocr) for usage instructions.
## Model Details
**Model Type:** Model_use_case.image_to_text
**Model Stats:**
- Input resolution: 320x320
- Model checkpoint: trocr-small-stage1
- Model size (decoder) (float): 146 MB
- Model size (encoder) (float): 87.8 MB
- Number of parameters (decoder): 38.3M
- Number of parameters (encoder): 23.0M
## Performance Summary
| Model | Runtime | Precision | Chipset | Inference Time (ms) | Peak Memory Range (MB) | Primary Compute Unit
|---|---|---|---|---|---|---
| decoder | ONNX | float | Snapdragon® X2 Elite | 1.273 ms | 7 - 7 MB | NPU
| decoder | ONNX | float | Snapdragon® X Elite | 2.072 ms | 68 - 68 MB | NPU
| decoder | ONNX | float | Snapdragon® 8 Gen 3 Mobile | 1.454 ms | 0 - 283 MB | NPU
| decoder | ONNX | float | Snapdragon® 8 Gen 1 Mobile | 2.723 ms | 1 - 219 MB | NPU
| decoder | ONNX | float | Qualcomm® Dragonwing™ IQ-8275 | 2.793 ms | 7 - 17 MB | NPU
| decoder | ONNX | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 2.112 ms | 1 - 3 MB | NPU
| decoder | ONNX | float | Qualcomm® QCS8450 | 2.723 ms | 1 - 219 MB | NPU
| decoder | ONNX | float | Qualcomm® Dragonwing™ IQ-9075 | 2.783 ms | 7 - 16 MB | NPU
| decoder | ONNX | float | Qualcomm® Dragonwing™ IQ-X7181 | 2.072 ms | 68 - 68 MB | NPU
| decoder | ONNX | float | Qualcomm® Dragonwing™ Q-8750 | 1.307 ms | 0 - 195 MB | NPU
| decoder | ONNX | float | Snapdragon® 8 Elite Mobile | 1.307 ms | 0 - 195 MB | NPU
| decoder | ONNX | float | Snapdragon® 8 Elite Gen 5 Mobile | 1.187 ms | 2 - 179 MB | NPU
| decoder | QNN_DLC | float | Snapdragon® X2 Elite | 1.61 ms | 7 - 7 MB | NPU
| decoder | QNN_DLC | float | Snapdragon® X Elite | 2.223 ms | 7 - 7 MB | NPU
| decoder | QNN_DLC | float | Snapdragon® 8 Gen 3 Mobile | 1.383 ms | 0 - 274 MB | NPU
| decoder | QNN_DLC | float | Snapdragon® 8 Gen 1 Mobile | 2.678 ms | 2 - 217 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® Dragonwing™ IQ-8275 | 2.639 ms | 7 - 16 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® Dragonwing™ IQ-8275 | 4.17 ms | 5 - 105 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 2.016 ms | 4 - 177 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® SA8775P | 2.886 ms | 5 - 105 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® SA8650P | 2.886 ms | 5 - 105 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® SA8255P | 2.886 ms | 5 - 105 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® QCS8450 | 2.678 ms | 2 - 217 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® Dragonwing™ IQ-9075 | 2.645 ms | 7 - 16 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® Dragonwing™ IQ-X7181 | 2.223 ms | 7 - 7 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® Dragonwing™ Q-8750 | 1.25 ms | 0 - 188 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® SA7255P | 4.17 ms | 5 - 105 MB | NPU
| decoder | QNN_DLC | float | Qualcomm® SA8295P | 2.621 ms | 0 - 41 MB | NPU
| decoder | QNN_DLC | float | Snapdragon® 8 Elite Mobile | 1.25 ms | 0 - 188 MB | NPU
| decoder | QNN_DLC | float | Snapdragon® 8 Elite Gen 5 Mobile | 1.152 ms | 1 - 173 MB | NPU
| decoder | TFLITE | float | Snapdragon® 8 Gen 3 Mobile | 1.375 ms | 0 - 280 MB | NPU
| decoder | TFLITE | float | Snapdragon® 8 Gen 1 Mobile | 2.443 ms | 0 - 218 MB | NPU
| decoder | TFLITE | float | Qualcomm® Dragonwing™ IQ-8275 | 2.678 ms | 0 - 84 MB | NPU
| decoder | TFLITE | float | Qualcomm® Dragonwing™ IQ-8275 | 4.215 ms | 0 - 103 MB | NPU
| decoder | TFLITE | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 1.952 ms | 0 - 2 MB | NPU
| decoder | TFLITE | float | Qualcomm® SA8775P | 2.838 ms | 0 - 103 MB | NPU
| decoder | TFLITE | float | Qualcomm® SA8650P | 2.838 ms | 0 - 103 MB | NPU
| decoder | TFLITE | float | Qualcomm® SA8255P | 2.838 ms | 0 - 103 MB | NPU
| decoder | TFLITE | float | Qualcomm® QCS8450 | 2.443 ms | 0 - 218 MB | NPU
| decoder | TFLITE | float | Qualcomm® Dragonwing™ IQ-9075 | 2.626 ms | 0 - 83 MB | NPU
| decoder | TFLITE | float | Qualcomm® Dragonwing™ Q-8750 | 1.234 ms | 0 - 189 MB | NPU
| decoder | TFLITE | float | Qualcomm® SA7255P | 4.215 ms | 0 - 103 MB | NPU
| decoder | TFLITE | float | Snapdragon® 8 Elite Mobile | 1.234 ms | 0 - 189 MB | NPU
| decoder | TFLITE | float | Snapdragon® 8 Elite Gen 5 Mobile | 1.129 ms | 0 - 177 MB | NPU
| encoder | ONNX | float | Snapdragon® X2 Elite | 4.549 ms | 16 - 16 MB | NPU
| encoder | ONNX | float | Snapdragon® X Elite | 11.422 ms | 47 - 47 MB | NPU
| encoder | ONNX | float | Snapdragon® 8 Gen 3 Mobile | 7.835 ms | 0 - 200 MB | NPU
| encoder | ONNX | float | Snapdragon® 8 Gen 1 Mobile | 19.866 ms | 0 - 317 MB | NPU
| encoder | ONNX | float | Qualcomm® Dragonwing™ IQ-8275 | 13.966 ms | 15 - 20 MB | NPU
| encoder | ONNX | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 10.914 ms | 0 - 57 MB | NPU
| encoder | ONNX | float | Qualcomm® QCS8450 | 19.866 ms | 0 - 317 MB | NPU
| encoder | ONNX | float | Qualcomm® Dragonwing™ IQ-9075 | 13.355 ms | 15 - 19 MB | NPU
| encoder | ONNX | float | Qualcomm® Dragonwing™ IQ-X7181 | 11.422 ms | 47 - 47 MB | NPU
| encoder | ONNX | float | Qualcomm® Dragonwing™ Q-8750 | 5.282 ms | 16 - 144 MB | NPU
| encoder | ONNX | float | Snapdragon® 8 Elite Mobile | 5.282 ms | 16 - 144 MB | NPU
| encoder | ONNX | float | Snapdragon® 8 Elite Gen 5 Mobile | 4.167 ms | 0 - 126 MB | NPU
| encoder | QNN_DLC | float | Snapdragon® X2 Elite | 5.224 ms | 2 - 2 MB | NPU
| encoder | QNN_DLC | float | Snapdragon® X Elite | 12.056 ms | 2 - 2 MB | NPU
| encoder | QNN_DLC | float | Snapdragon® 8 Gen 3 Mobile | 8.007 ms | 0 - 188 MB | NPU
| encoder | QNN_DLC | float | Snapdragon® 8 Gen 1 Mobile | 19.486 ms | 0 - 306 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® Dragonwing™ IQ-8275 | 14.267 ms | 2 - 13 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® Dragonwing™ IQ-8275 | 37.071 ms | 2 - 107 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 11.286 ms | 2 - 3 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® SA8775P | 14.013 ms | 2 - 109 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® SA8650P | 14.013 ms | 2 - 109 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® SA8255P | 14.013 ms | 2 - 109 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® QCS8450 | 19.486 ms | 0 - 306 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® Dragonwing™ IQ-9075 | 13.793 ms | 2 - 12 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® Dragonwing™ IQ-X7181 | 12.056 ms | 2 - 2 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® Dragonwing™ Q-8750 | 5.448 ms | 2 - 116 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® SA7255P | 37.071 ms | 2 - 107 MB | NPU
| encoder | QNN_DLC | float | Qualcomm® SA8295P | 19.696 ms | 2 - 234 MB | NPU
| encoder | QNN_DLC | float | Snapdragon® 8 Elite Mobile | 5.448 ms | 2 - 116 MB | NPU
| encoder | QNN_DLC | float | Snapdragon® 8 Elite Gen 5 Mobile | 4.356 ms | 2 - 117 MB | NPU
| encoder | TFLITE | float | Snapdragon® 8 Gen 3 Mobile | 7.703 ms | 0 - 189 MB | NPU
| encoder | TFLITE | float | Snapdragon® 8 Gen 1 Mobile | 19.663 ms | 5 - 310 MB | NPU
| encoder | TFLITE | float | Qualcomm® Dragonwing™ IQ-8275 | 13.696 ms | 7 - 67 MB | NPU
| encoder | TFLITE | float | Qualcomm® Dragonwing™ IQ-8275 | 36.837 ms | 7 - 119 MB | NPU
| encoder | TFLITE | float | Qualcomm® Dragonwing™ QCS8550 (Proxy) | 10.72 ms | 7 - 9 MB | NPU
| encoder | TFLITE | float | Qualcomm® SA8775P | 13.486 ms | 7 - 111 MB | NPU
| encoder | TFLITE | float | Qualcomm® SA8650P | 13.486 ms | 7 - 111 MB | NPU
| encoder | TFLITE | float | Qualcomm® SA8255P | 13.486 ms | 7 - 111 MB | NPU
| encoder | TFLITE | float | Qualcomm® QCS8450 | 19.663 ms | 5 - 310 MB | NPU
| encoder | TFLITE | float | Qualcomm® Dragonwing™ IQ-9075 | 13.352 ms | 7 - 66 MB | NPU
| encoder | TFLITE | float | Qualcomm® Dragonwing™ Q-8750 | 5.202 ms | 7 - 120 MB | NPU
| encoder | TFLITE | float | Qualcomm® SA7255P | 36.837 ms | 7 - 119 MB | NPU
| encoder | TFLITE | float | Snapdragon® 8 Elite Mobile | 5.202 ms | 7 - 120 MB | NPU
| encoder | TFLITE | float | Snapdragon® 8 Elite Gen 5 Mobile | 4.118 ms | 7 - 111 MB | NPU
## License
* The license for the original implementation of TrOCR can be found
 [here](https://github.com/microsoft/unilm/blob/master/LICENSE).
## References
* [TrOCR: Transformer-based Optical Character Recognition with Pre-trained Models](https://arxiv.org/abs/2109.10282)
* [Source Model Implementation](https://huggingface.co/microsoft/trocr-small-stage1)
## Community
* Join [our AI Hub Slack community](https://aihub.qualcomm.com/community/slack) to collaborate, post questions and learn more about on-device AI.
* For questions or feedback please [reach out to us](mailto:ai-hub-support@qti.qualcomm.com).