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. This repository contains pre-exported model files optimized for Qualcomm® devices. You can use the Qualcomm® AI Hub Models library to export with custom configurations. More details on model performance across various devices, can be found here.

Qualcomm AI Hub Models uses Qualcomm AI Hub Workbench to compile, profile, and evaluate this model. Sign up 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 2.37, ONNX Runtime 1.23.0	Download
QNN_DLC	float	Universal	QAIRT 2.42	Download
TFLITE	float	Universal	QAIRT 2.42, TFLite 2.17.0	Download

For more device-specific assets and performance metrics, visit TrOCR on Qualcomm® AI Hub.

Option 2: Export with Custom Configurations

Use the Qualcomm® AI Hub Models 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 for usage instructions.

Model Details

Model Type: Model_use_case.image_to_text

Model Stats:

Model checkpoint: trocr-small-stage1
Input resolution: 320x320
Number of parameters (TrOCRDecoder): 38.3M
Model size (TrOCRDecoder) (float): 146 MB
Number of parameters (TrOCREncoder): 23.0M
Model size (TrOCREncoder) (float): 87.8 MB

Performance Summary

Model	Runtime	Precision	Chipset	Inference Time (ms)	Peak Memory Range (MB)	Primary Compute Unit
TrOCRDecoder	ONNX	float	Snapdragon® X Elite	2.358 ms	67 - 67 MB	NPU
TrOCRDecoder	ONNX	float	Snapdragon® 8 Gen 3 Mobile	1.842 ms	0 - 287 MB	NPU
TrOCRDecoder	ONNX	float	Qualcomm® QCS8550 (Proxy)	2.51 ms	0 - 350 MB	NPU
TrOCRDecoder	ONNX	float	Qualcomm® QCS9075	2.962 ms	7 - 17 MB	NPU
TrOCRDecoder	ONNX	float	Snapdragon® 8 Elite For Galaxy Mobile	1.587 ms	0 - 271 MB	NPU
TrOCRDecoder	ONNX	float	Snapdragon® 8 Elite Gen 5 Mobile	1.424 ms	0 - 258 MB	NPU
TrOCRDecoder	QNN_DLC	float	Snapdragon® X Elite	2.172 ms	7 - 7 MB	NPU
TrOCRDecoder	QNN_DLC	float	Snapdragon® 8 Gen 3 Mobile	1.388 ms	0 - 243 MB	NPU
TrOCRDecoder	QNN_DLC	float	Qualcomm® QCS8275 (Proxy)	4.138 ms	7 - 148 MB	NPU
TrOCRDecoder	QNN_DLC	float	Qualcomm® QCS8550 (Proxy)	1.932 ms	3 - 5 MB	NPU
TrOCRDecoder	QNN_DLC	float	Qualcomm® SA8775P	2.764 ms	7 - 148 MB	NPU
TrOCRDecoder	QNN_DLC	float	Qualcomm® QCS9075	2.54 ms	7 - 15 MB	NPU
TrOCRDecoder	QNN_DLC	float	Qualcomm® QCS8450 (Proxy)	2.835 ms	2 - 216 MB	NPU
TrOCRDecoder	QNN_DLC	float	Qualcomm® SA7255P	4.138 ms	7 - 148 MB	NPU
TrOCRDecoder	QNN_DLC	float	Qualcomm® SA8295P	2.802 ms	7 - 130 MB	NPU
TrOCRDecoder	QNN_DLC	float	Snapdragon® 8 Elite For Galaxy Mobile	1.208 ms	0 - 227 MB	NPU
TrOCRDecoder	QNN_DLC	float	Snapdragon® 8 Elite Gen 5 Mobile	1.093 ms	1 - 213 MB	NPU
TrOCRDecoder	TFLITE	float	Snapdragon® 8 Gen 3 Mobile	1.404 ms	0 - 258 MB	NPU
TrOCRDecoder	TFLITE	float	Qualcomm® QCS8275 (Proxy)	4.162 ms	0 - 160 MB	NPU
TrOCRDecoder	TFLITE	float	Qualcomm® QCS8550 (Proxy)	2.009 ms	0 - 8 MB	NPU
TrOCRDecoder	TFLITE	float	Qualcomm® SA8775P	8.646 ms	0 - 161 MB	NPU
TrOCRDecoder	TFLITE	float	Qualcomm® QCS9075	2.547 ms	0 - 83 MB	NPU
TrOCRDecoder	TFLITE	float	Qualcomm® QCS8450 (Proxy)	2.815 ms	0 - 224 MB	NPU
TrOCRDecoder	TFLITE	float	Qualcomm® SA7255P	4.162 ms	0 - 160 MB	NPU
TrOCRDecoder	TFLITE	float	Qualcomm® SA8295P	2.8 ms	0 - 142 MB	NPU
TrOCRDecoder	TFLITE	float	Snapdragon® 8 Elite For Galaxy Mobile	1.166 ms	0 - 235 MB	NPU
TrOCRDecoder	TFLITE	float	Snapdragon® 8 Elite Gen 5 Mobile	1.105 ms	0 - 215 MB	NPU
TrOCREncoder	ONNX	float	Snapdragon® X Elite	18.045 ms	48 - 48 MB	NPU
TrOCREncoder	ONNX	float	Snapdragon® 8 Gen 3 Mobile	11.593 ms	14 - 389 MB	NPU
TrOCREncoder	ONNX	float	Qualcomm® QCS8550 (Proxy)	17.6 ms	0 - 57 MB	NPU
TrOCREncoder	ONNX	float	Qualcomm® QCS9075	21.826 ms	15 - 19 MB	NPU
TrOCREncoder	ONNX	float	Snapdragon® 8 Elite For Galaxy Mobile	10.097 ms	14 - 280 MB	NPU
TrOCREncoder	ONNX	float	Snapdragon® 8 Elite Gen 5 Mobile	7.252 ms	1 - 245 MB	NPU
TrOCREncoder	QNN_DLC	float	Snapdragon® X Elite	18.938 ms	2 - 2 MB	NPU
TrOCREncoder	QNN_DLC	float	Snapdragon® 8 Gen 3 Mobile	12.557 ms	0 - 381 MB	NPU
TrOCREncoder	QNN_DLC	float	Qualcomm® QCS8275 (Proxy)	47.203 ms	2 - 291 MB	NPU
TrOCREncoder	QNN_DLC	float	Qualcomm® QCS8550 (Proxy)	18.324 ms	2 - 4 MB	NPU
TrOCREncoder	QNN_DLC	float	Qualcomm® SA8775P	20.83 ms	2 - 292 MB	NPU
TrOCREncoder	QNN_DLC	float	Qualcomm® QCS9075	22.183 ms	2 - 12 MB	NPU
TrOCREncoder	QNN_DLC	float	Qualcomm® QCS8450 (Proxy)	28.527 ms	0 - 360 MB	NPU
TrOCREncoder	QNN_DLC	float	Qualcomm® SA7255P	47.203 ms	2 - 291 MB	NPU
TrOCREncoder	QNN_DLC	float	Qualcomm® SA8295P	26.372 ms	2 - 291 MB	NPU
TrOCREncoder	QNN_DLC	float	Snapdragon® 8 Elite For Galaxy Mobile	8.827 ms	2 - 312 MB	NPU
TrOCREncoder	QNN_DLC	float	Snapdragon® 8 Elite Gen 5 Mobile	7.254 ms	2 - 303 MB	NPU
TrOCREncoder	TFLITE	float	Snapdragon® 8 Gen 3 Mobile	8.625 ms	5 - 233 MB	NPU
TrOCREncoder	TFLITE	float	Qualcomm® QCS8275 (Proxy)	38.239 ms	7 - 149 MB	NPU
TrOCREncoder	TFLITE	float	Qualcomm® QCS8550 (Proxy)	12.241 ms	0 - 2 MB	NPU
TrOCREncoder	TFLITE	float	Qualcomm® SA8775P	14.713 ms	7 - 161 MB	NPU
TrOCREncoder	TFLITE	float	Qualcomm® QCS9075	15.775 ms	6 - 66 MB	NPU
TrOCREncoder	TFLITE	float	Qualcomm® QCS8450 (Proxy)	22.075 ms	7 - 348 MB	NPU
TrOCREncoder	TFLITE	float	Qualcomm® SA7255P	38.239 ms	7 - 149 MB	NPU
TrOCREncoder	TFLITE	float	Qualcomm® SA8295P	20.792 ms	7 - 286 MB	NPU
TrOCREncoder	TFLITE	float	Snapdragon® 8 Elite For Galaxy Mobile	5.851 ms	6 - 151 MB	NPU
TrOCREncoder	TFLITE	float	Snapdragon® 8 Elite Gen 5 Mobile	4.58 ms	6 - 212 MB	NPU

License

The license for the original implementation of TrOCR can be found here.

References

Community

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Paper for qualcomm/TrOCR

TrOCR: Transformer-based Optical Character Recognition with Pre-trained Models

Paper • 2109.10282 • Published Sep 21, 2021 • 12