ResNet-2Plus1D: Optimized for Qualcomm Devices

ResNet (2+1)D Convolutions is a network which explicitly factorizes 3D convolution into two separate and successive operations, a 2D spatial convolution and a 1D temporal convolution. It used for video understanding applications.

This is based on the implementation of ResNet-2Plus1D 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 2.50, ONNX Runtime 1.30.0	Download
ONNX	w8a8	Universal	QAIRT 2.50, ONNX Runtime 1.30.0	Download
QNN_DLC	float	Universal	QAIRT 2.50	Download
QNN_DLC	w8a8	Universal	QAIRT 2.50	Download
TFLITE	float	Universal	QAIRT 2.50	Download
TFLITE	w8a8	Universal	QAIRT 2.50	Download

For more device-specific assets and performance metrics, visit ResNet-2Plus1D 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 ResNet-2Plus1D on GitHub for usage instructions.

Model Details

Model Type: Model_use_case.video_classification

Model Stats:

• Input resolution: 112x112
• Model checkpoint: Kinetics-400
• Model size (float): 120 MB
• Model size (w8a8): 30.8 MB
• Number of parameters: 31.5M

Performance Summary

Model	Runtime	Precision	Chipset	Inference Time (ms)	Peak Memory Range (MB)	Primary Compute Unit
ResNet-2Plus1D	ONNX	float	Snapdragon® 8 Elite Gen 5 For Galaxy Mobile	5.812 ms	2 - 200 MB	NPU
ResNet-2Plus1D	ONNX	float	Snapdragon® 8 Elite For Galaxy Mobile	7.03 ms	0 - 195 MB	NPU
ResNet-2Plus1D	ONNX	float	Snapdragon® X2 Elite	6.116 ms	2 - 2 MB	NPU
ResNet-2Plus1D	ONNX	float	Snapdragon® X Elite	11.874 ms	60 - 60 MB	NPU
ResNet-2Plus1D	ONNX	float	Snapdragon® 8 Gen 3 Mobile	9.203 ms	0 - 270 MB	NPU
ResNet-2Plus1D	ONNX	float	Snapdragon® 8 Gen 1 Mobile	20.939 ms	1 - 251 MB	NPU
ResNet-2Plus1D	ONNX	float	Qualcomm® Dragonwing™ IQ-8275	23.578 ms	2 - 9 MB	NPU
ResNet-2Plus1D	ONNX	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	11.821 ms	2 - 6 MB	NPU
ResNet-2Plus1D	ONNX	float	Qualcomm® QCS8450	20.939 ms	1 - 251 MB	NPU
ResNet-2Plus1D	ONNX	float	Qualcomm® Dragonwing™ IQ-9075	20.755 ms	2 - 8 MB	NPU
ResNet-2Plus1D	ONNX	float	Qualcomm® Dragonwing™ IQ-X7181	11.874 ms	60 - 60 MB	NPU
ResNet-2Plus1D	ONNX	float	Qualcomm® Dragonwing™ Q-8750	7.03 ms	0 - 195 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Snapdragon® 8 Elite Gen 5 For Galaxy Mobile	1.959 ms	0 - 178 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Snapdragon® 8 Elite For Galaxy Mobile	2.572 ms	0 - 177 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Snapdragon® X2 Elite	2.034 ms	2 - 2 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Snapdragon® X Elite	4.21 ms	31 - 31 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Snapdragon® 8 Gen 3 Mobile	3.234 ms	0 - 212 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Snapdragon® 8 Gen 1 Mobile	5.681 ms	1 - 212 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Qualcomm® Dragonwing™ QCS6490	18.294 ms	1 - 4 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Qualcomm® Dragonwing™ IQ-8275	4.385 ms	0 - 4 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Qualcomm® Dragonwing™ QCS8550 (Proxy)	4.215 ms	0 - 42 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Qualcomm® QCS8450	5.681 ms	1 - 212 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Qualcomm® Dragonwing™ IQ-9075	4.112 ms	1 - 4 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Qualcomm® Dragonwing™ IQ-X7181	4.21 ms	31 - 31 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Qualcomm® Dragonwing™ Q-6690	67.195 ms	0 - 185 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Qualcomm® Dragonwing™ Q-7790	7.644 ms	1 - 178 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Qualcomm® Dragonwing™ Q-8750	2.572 ms	0 - 177 MB	NPU
ResNet-2Plus1D	ONNX	w8a8	Snapdragon® 7 Gen 4 Mobile	7.644 ms	1 - 178 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Snapdragon® 8 Elite Gen 5 For Galaxy Mobile	5.793 ms	2 - 201 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Snapdragon® 8 Elite For Galaxy Mobile	7.149 ms	0 - 192 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Snapdragon® X2 Elite	6.573 ms	2 - 2 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Snapdragon® X Elite	12.342 ms	2 - 2 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Snapdragon® 8 Gen 3 Mobile	9.165 ms	2 - 272 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Snapdragon® 8 Gen 1 Mobile	20.703 ms	2 - 252 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® Dragonwing™ IQ-8275	23.869 ms	2 - 7 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	11.974 ms	2 - 4 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® SA8775P	20.739 ms	1 - 195 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® SA8650P	20.739 ms	1 - 195 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® SA8255P	20.739 ms	1 - 195 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® QCS8450	20.703 ms	2 - 252 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® Dragonwing™ IQ-9075	20.997 ms	2 - 7 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® Dragonwing™ IQ-X7181	12.342 ms	2 - 2 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® Dragonwing™ Q-8750	7.149 ms	0 - 192 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® SA7255P	81.184 ms	0 - 193 MB	NPU
ResNet-2Plus1D	QNN_DLC	float	Qualcomm® SA8295P	22.256 ms	0 - 177 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Snapdragon® 8 Elite Gen 5 For Galaxy Mobile	2.027 ms	1 - 175 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Snapdragon® 8 Elite For Galaxy Mobile	2.572 ms	1 - 177 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Snapdragon® X2 Elite	2.398 ms	1 - 1 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Snapdragon® X Elite	4.572 ms	1 - 1 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Snapdragon® 8 Gen 3 Mobile	3.357 ms	1 - 210 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Snapdragon® 8 Gen 1 Mobile	5.592 ms	1 - 208 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® Dragonwing™ QCS6490	18.425 ms	1 - 3 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® Dragonwing™ IQ-8275	4.44 ms	1 - 4 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® Dragonwing™ QCS8550 (Proxy)	4.318 ms	1 - 2 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® SA8775P	4.365 ms	1 - 173 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® SA8650P	4.365 ms	1 - 173 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® SA8255P	4.365 ms	1 - 173 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® QCS8450	5.592 ms	1 - 208 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® Dragonwing™ IQ-9075	4.184 ms	3 - 5 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® Dragonwing™ IQ-X7181	4.572 ms	1 - 1 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® Dragonwing™ Q-6690	76.701 ms	1 - 184 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® Dragonwing™ Q-7790	7.844 ms	1 - 180 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® Dragonwing™ Q-8750	2.572 ms	1 - 177 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® SA7255P	13.054 ms	1 - 172 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Qualcomm® SA8295P	7.326 ms	1 - 176 MB	NPU
ResNet-2Plus1D	QNN_DLC	w8a8	Snapdragon® 7 Gen 4 Mobile	7.844 ms	1 - 180 MB	NPU
ResNet-2Plus1D	TFLITE	float	Snapdragon® 8 Elite Gen 5 For Galaxy Mobile	230.389 ms	0 - 233 MB	NPU
ResNet-2Plus1D	TFLITE	float	Snapdragon® 8 Elite For Galaxy Mobile	249.511 ms	0 - 224 MB	NPU
ResNet-2Plus1D	TFLITE	float	Snapdragon® 8 Gen 3 Mobile	258.45 ms	0 - 297 MB	NPU
ResNet-2Plus1D	TFLITE	float	Snapdragon® 8 Gen 1 Mobile	395.303 ms	0 - 290 MB	NPU
ResNet-2Plus1D	TFLITE	float	Qualcomm® Dragonwing™ IQ-8275	330.905 ms	0 - 68 MB	NPU
ResNet-2Plus1D	TFLITE	float	Qualcomm® Dragonwing™ QCS8550 (Proxy)	331.425 ms	0 - 3 MB	NPU
ResNet-2Plus1D	TFLITE	float	Qualcomm® QCS8450	395.303 ms	0 - 290 MB	NPU
ResNet-2Plus1D	TFLITE	float	Qualcomm® Dragonwing™ IQ-9075	347.321 ms	0 - 67 MB	NPU
ResNet-2Plus1D	TFLITE	float	Qualcomm® Dragonwing™ Q-8750	249.511 ms	0 - 224 MB	NPU
ResNet-2Plus1D	TFLITE	float	Qualcomm® SA7255P	640.764 ms	1 - 220 MB	NPU
ResNet-2Plus1D	TFLITE	float	Qualcomm® SA8295P	415.17 ms	0 - 215 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Snapdragon® 8 Elite Gen 5 For Galaxy Mobile	497.106 ms	0 - 381 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Snapdragon® 8 Elite For Galaxy Mobile	462.792 ms	0 - 322 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Snapdragon® 8 Gen 3 Mobile	546.641 ms	0 - 395 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Snapdragon® 8 Gen 1 Mobile	830.839 ms	1 - 471 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® Dragonwing™ QCS6490	1773.175 ms	267 - 429 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® Dragonwing™ IQ-8275	715.638 ms	0 - 67 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® Dragonwing™ QCS8550 (Proxy)	742.128 ms	0 - 3 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® SA8775P	751.403 ms	1 - 314 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® SA8650P	751.403 ms	1 - 314 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® SA8255P	751.403 ms	1 - 314 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® QCS8450	830.839 ms	1 - 471 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® Dragonwing™ IQ-9075	751.581 ms	0 - 66 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® Dragonwing™ Q-6690	1607.178 ms	306 - 468 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® Dragonwing™ Q-7790	1218.682 ms	244 - 316 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® Dragonwing™ Q-8750	462.792 ms	0 - 322 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Qualcomm® SA8295P	827.737 ms	1 - 315 MB	NPU
ResNet-2Plus1D	TFLITE	w8a8	Snapdragon® 7 Gen 4 Mobile	1218.682 ms	244 - 316 MB	NPU

License

• The license for the original implementation of ResNet-2Plus1D can be found here.

References

• A Closer Look at Spatiotemporal Convolutions for Action Recognition
• Source Model Implementation

Community

• Join our AI Hub Slack community to collaborate, post questions and learn more about on-device AI.
• For questions or feedback please reach out to us.