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metadata 
library_name: pytorch
license: other
tags:
  - backbone
  - android
pipeline_tag: image-classification

ResNet18: Optimized for Mobile Deployment

Imagenet classifier and general purpose backbone

ResNet18 is a machine learning model that can classify images from the Imagenet dataset. It can also be used as a backbone in building more complex models for specific use cases.

This model is an implementation of ResNet18 found here.

This repository provides scripts to run ResNet18 on Qualcomm® devices. More details on model performance across various devices, can be found here.

Model Details

  • Model Type: Model_use_case.image_classification
  • Model Stats:
    • Model checkpoint: Imagenet
    • Input resolution: 224x224
    • Number of parameters: 11.7M
    • Model size (float): 44.6 MB
    • Model size (w8a8): 11.3 MB
Model Precision Device Chipset Target Runtime Inference Time (ms) Peak Memory Range (MB) Primary Compute Unit Target Model
ResNet18 float QCS8275 (Proxy) Qualcomm® QCS8275 (Proxy) TFLITE 6.113 ms 0 - 15 MB NPU ResNet18.tflite
ResNet18 float QCS8275 (Proxy) Qualcomm® QCS8275 (Proxy) QNN 6.003 ms 1 - 10 MB NPU Use Export Script
ResNet18 float QCS8450 (Proxy) Qualcomm® QCS8450 (Proxy) TFLITE 2.005 ms 0 - 45 MB NPU ResNet18.tflite
ResNet18 float QCS8450 (Proxy) Qualcomm® QCS8450 (Proxy) QNN 2.467 ms 1 - 22 MB NPU Use Export Script
ResNet18 float QCS8550 (Proxy) Qualcomm® QCS8550 (Proxy) TFLITE 1.419 ms 0 - 210 MB NPU ResNet18.tflite
ResNet18 float QCS8550 (Proxy) Qualcomm® QCS8550 (Proxy) QNN 1.271 ms 1 - 4 MB NPU Use Export Script
ResNet18 float QCS9075 (Proxy) Qualcomm® QCS9075 (Proxy) TFLITE 2.204 ms 0 - 17 MB NPU ResNet18.tflite
ResNet18 float QCS9075 (Proxy) Qualcomm® QCS9075 (Proxy) QNN 1.97 ms 0 - 14 MB NPU Use Export Script
ResNet18 float SA7255P ADP Qualcomm® SA7255P TFLITE 6.113 ms 0 - 15 MB NPU ResNet18.tflite
ResNet18 float SA7255P ADP Qualcomm® SA7255P QNN 6.003 ms 1 - 10 MB NPU Use Export Script
ResNet18 float SA8255 (Proxy) Qualcomm® SA8255P (Proxy) TFLITE 1.42 ms 0 - 209 MB NPU ResNet18.tflite
ResNet18 float SA8255 (Proxy) Qualcomm® SA8255P (Proxy) QNN 1.272 ms 1 - 3 MB NPU Use Export Script
ResNet18 float SA8295P ADP Qualcomm® SA8295P TFLITE 2.489 ms 0 - 17 MB NPU ResNet18.tflite
ResNet18 float SA8295P ADP Qualcomm® SA8295P QNN 2.297 ms 0 - 18 MB NPU Use Export Script
ResNet18 float SA8650 (Proxy) Qualcomm® SA8650P (Proxy) TFLITE 1.413 ms 0 - 209 MB NPU ResNet18.tflite
ResNet18 float SA8650 (Proxy) Qualcomm® SA8650P (Proxy) QNN 1.275 ms 1 - 3 MB NPU Use Export Script
ResNet18 float SA8775P ADP Qualcomm® SA8775P TFLITE 2.204 ms 0 - 17 MB NPU ResNet18.tflite
ResNet18 float SA8775P ADP Qualcomm® SA8775P QNN 1.97 ms 0 - 14 MB NPU Use Export Script
ResNet18 float Samsung Galaxy S23 Snapdragon® 8 Gen 2 Mobile TFLITE 1.421 ms 0 - 209 MB NPU ResNet18.tflite
ResNet18 float Samsung Galaxy S23 Snapdragon® 8 Gen 2 Mobile QNN 1.275 ms 0 - 76 MB NPU Use Export Script
ResNet18 float Samsung Galaxy S23 Snapdragon® 8 Gen 2 Mobile ONNX 1.153 ms 0 - 68 MB NPU ResNet18.onnx
ResNet18 float Samsung Galaxy S24 Snapdragon® 8 Gen 3 Mobile TFLITE 1.002 ms 0 - 41 MB NPU ResNet18.tflite
ResNet18 float Samsung Galaxy S24 Snapdragon® 8 Gen 3 Mobile QNN 0.899 ms 0 - 22 MB NPU Use Export Script
ResNet18 float Samsung Galaxy S24 Snapdragon® 8 Gen 3 Mobile ONNX 0.839 ms 0 - 21 MB NPU ResNet18.onnx
ResNet18 float Snapdragon 8 Elite QRD Snapdragon® 8 Elite Mobile TFLITE 0.892 ms 0 - 17 MB NPU ResNet18.tflite
ResNet18 float Snapdragon 8 Elite QRD Snapdragon® 8 Elite Mobile QNN 0.695 ms 1 - 19 MB NPU Use Export Script
ResNet18 float Snapdragon 8 Elite QRD Snapdragon® 8 Elite Mobile ONNX 0.831 ms 1 - 16 MB NPU ResNet18.onnx
ResNet18 float Snapdragon X Elite CRD Snapdragon® X Elite QNN 1.405 ms 1 - 1 MB NPU Use Export Script
ResNet18 float Snapdragon X Elite CRD Snapdragon® X Elite ONNX 1.312 ms 23 - 23 MB NPU ResNet18.onnx
ResNet18 w8a8 QCS8275 (Proxy) Qualcomm® QCS8275 (Proxy) TFLITE 1.088 ms 0 - 12 MB NPU ResNet18.tflite
ResNet18 w8a8 QCS8275 (Proxy) Qualcomm® QCS8275 (Proxy) QNN 1.35 ms 0 - 10 MB NPU Use Export Script
ResNet18 w8a8 QCS8450 (Proxy) Qualcomm® QCS8450 (Proxy) TFLITE 0.551 ms 0 - 44 MB NPU ResNet18.tflite
ResNet18 w8a8 QCS8450 (Proxy) Qualcomm® QCS8450 (Proxy) QNN 0.833 ms 0 - 42 MB NPU Use Export Script
ResNet18 w8a8 QCS8550 (Proxy) Qualcomm® QCS8550 (Proxy) TFLITE 0.42 ms 0 - 78 MB NPU ResNet18.tflite
ResNet18 w8a8 QCS8550 (Proxy) Qualcomm® QCS8550 (Proxy) QNN 0.55 ms 0 - 3 MB NPU Use Export Script
ResNet18 w8a8 QCS9075 (Proxy) Qualcomm® QCS9075 (Proxy) TFLITE 0.601 ms 0 - 15 MB NPU ResNet18.tflite
ResNet18 w8a8 QCS9075 (Proxy) Qualcomm® QCS9075 (Proxy) QNN 0.711 ms 0 - 15 MB NPU Use Export Script
ResNet18 w8a8 RB3 Gen 2 (Proxy) Qualcomm® QCS6490 (Proxy) TFLITE 1.447 ms 0 - 29 MB NPU ResNet18.tflite
ResNet18 w8a8 RB3 Gen 2 (Proxy) Qualcomm® QCS6490 (Proxy) QNN 2.132 ms 0 - 11 MB NPU Use Export Script
ResNet18 w8a8 RB5 (Proxy) Qualcomm® QCS8250 (Proxy) TFLITE 7.385 ms 0 - 2 MB NPU ResNet18.tflite
ResNet18 w8a8 SA7255P ADP Qualcomm® SA7255P TFLITE 1.088 ms 0 - 12 MB NPU ResNet18.tflite
ResNet18 w8a8 SA7255P ADP Qualcomm® SA7255P QNN 1.35 ms 0 - 10 MB NPU Use Export Script
ResNet18 w8a8 SA8255 (Proxy) Qualcomm® SA8255P (Proxy) TFLITE 0.411 ms 0 - 77 MB NPU ResNet18.tflite
ResNet18 w8a8 SA8255 (Proxy) Qualcomm® SA8255P (Proxy) QNN 0.552 ms 0 - 2 MB NPU Use Export Script
ResNet18 w8a8 SA8295P ADP Qualcomm® SA8295P TFLITE 0.79 ms 0 - 16 MB NPU ResNet18.tflite
ResNet18 w8a8 SA8295P ADP Qualcomm® SA8295P QNN 0.931 ms 0 - 18 MB NPU Use Export Script
ResNet18 w8a8 SA8650 (Proxy) Qualcomm® SA8650P (Proxy) TFLITE 0.424 ms 0 - 75 MB NPU ResNet18.tflite
ResNet18 w8a8 SA8650 (Proxy) Qualcomm® SA8650P (Proxy) QNN 0.551 ms 0 - 2 MB NPU Use Export Script
ResNet18 w8a8 SA8775P ADP Qualcomm® SA8775P TFLITE 0.601 ms 0 - 15 MB NPU ResNet18.tflite
ResNet18 w8a8 SA8775P ADP Qualcomm® SA8775P QNN 0.711 ms 0 - 15 MB NPU Use Export Script
ResNet18 w8a8 Samsung Galaxy S23 Snapdragon® 8 Gen 2 Mobile TFLITE 0.417 ms 0 - 75 MB NPU ResNet18.tflite
ResNet18 w8a8 Samsung Galaxy S23 Snapdragon® 8 Gen 2 Mobile QNN 0.539 ms 0 - 74 MB NPU Use Export Script
ResNet18 w8a8 Samsung Galaxy S23 Snapdragon® 8 Gen 2 Mobile ONNX 12.016 ms 9 - 118 MB NPU ResNet18.onnx
ResNet18 w8a8 Samsung Galaxy S24 Snapdragon® 8 Gen 3 Mobile TFLITE 0.326 ms 0 - 38 MB NPU ResNet18.tflite
ResNet18 w8a8 Samsung Galaxy S24 Snapdragon® 8 Gen 3 Mobile QNN 0.414 ms 0 - 40 MB NPU Use Export Script
ResNet18 w8a8 Samsung Galaxy S24 Snapdragon® 8 Gen 3 Mobile ONNX 9.116 ms 10 - 225 MB NPU ResNet18.onnx
ResNet18 w8a8 Snapdragon 8 Elite QRD Snapdragon® 8 Elite Mobile TFLITE 0.324 ms 0 - 16 MB NPU ResNet18.tflite
ResNet18 w8a8 Snapdragon 8 Elite QRD Snapdragon® 8 Elite Mobile QNN 0.338 ms 0 - 17 MB NPU Use Export Script
ResNet18 w8a8 Snapdragon 8 Elite QRD Snapdragon® 8 Elite Mobile ONNX 7.591 ms 11 - 207 MB NPU ResNet18.onnx
ResNet18 w8a8 Snapdragon X Elite CRD Snapdragon® X Elite QNN 0.592 ms 0 - 0 MB NPU Use Export Script
ResNet18 w8a8 Snapdragon X Elite CRD Snapdragon® X Elite ONNX 11.926 ms 17 - 17 MB NPU ResNet18.onnx

Installation

Install the package via pip:

pip install qai-hub-models

Configure Qualcomm® AI Hub to run this model on a cloud-hosted device

Sign-in to Qualcomm® AI Hub with your Qualcomm® ID. Once signed in navigate to Account -> Settings -> API Token.

With this API token, you can configure your client to run models on the cloud hosted devices.

qai-hub configure --api_token API_TOKEN

Navigate to docs for more information.

Demo off target

The package contains a simple end-to-end demo that downloads pre-trained weights and runs this model on a sample input.

python -m qai_hub_models.models.resnet18.demo

The above demo runs a reference implementation of pre-processing, model inference, and post processing.

NOTE: If you want running in a Jupyter Notebook or Google Colab like environment, please add the following to your cell (instead of the above).

%run -m qai_hub_models.models.resnet18.demo

Run model on a cloud-hosted device

In addition to the demo, you can also run the model on a cloud-hosted Qualcomm® device. This script does the following:

  • Performance check on-device on a cloud-hosted device
  • Downloads compiled assets that can be deployed on-device for Android.
  • Accuracy check between PyTorch and on-device outputs.
python -m qai_hub_models.models.resnet18.export

Profiling Results
------------------------------------------------------------
ResNet18
Device                          : cs_8275 (ANDROID 14)                
Runtime                         : TFLITE                              
Estimated inference time (ms)   : 6.1                                 
Estimated peak memory usage (MB): [0, 15]                             
Total # Ops                     : 38                                  
Compute Unit(s)                 : npu (38 ops) gpu (0 ops) cpu (0 ops)

How does this work?

This export script leverages Qualcomm® AI Hub to optimize, validate, and deploy this model on-device. Lets go through each step below in detail:

Step 1: Compile model for on-device deployment

To compile a PyTorch model for on-device deployment, we first trace the model in memory using the jit.trace and then call the submit_compile_job API.

import torch

import qai_hub as hub
from qai_hub_models.models.resnet18 import Model

# Load the model
torch_model = Model.from_pretrained()

# Device
device = hub.Device("Samsung Galaxy S24")

# Trace model
input_shape = torch_model.get_input_spec()
sample_inputs = torch_model.sample_inputs()

pt_model = torch.jit.trace(torch_model, [torch.tensor(data[0]) for _, data in sample_inputs.items()])

# Compile model on a specific device
compile_job = hub.submit_compile_job(
    model=pt_model,
    device=device,
    input_specs=torch_model.get_input_spec(),
)

# Get target model to run on-device
target_model = compile_job.get_target_model()

Step 2: Performance profiling on cloud-hosted device

After compiling models from step 1. Models can be profiled model on-device using the target_model. Note that this scripts runs the model on a device automatically provisioned in the cloud. Once the job is submitted, you can navigate to a provided job URL to view a variety of on-device performance metrics.

profile_job = hub.submit_profile_job(
    model=target_model,
    device=device,
)

Step 3: Verify on-device accuracy

To verify the accuracy of the model on-device, you can run on-device inference on sample input data on the same cloud hosted device.

input_data = torch_model.sample_inputs()
inference_job = hub.submit_inference_job(
    model=target_model,
    device=device,
    inputs=input_data,
)
    on_device_output = inference_job.download_output_data()

With the output of the model, you can compute like PSNR, relative errors or spot check the output with expected output.

Note: This on-device profiling and inference requires access to Qualcomm® AI Hub. Sign up for access.

Run demo on a cloud-hosted device

You can also run the demo on-device.

python -m qai_hub_models.models.resnet18.demo --on-device

NOTE: If you want running in a Jupyter Notebook or Google Colab like environment, please add the following to your cell (instead of the above).

%run -m qai_hub_models.models.resnet18.demo -- --on-device

Deploying compiled model to Android

The models can be deployed using multiple runtimes:

  • TensorFlow Lite (.tflite export): This tutorial provides a guide to deploy the .tflite model in an Android application.

  • QNN (.so export ): This sample app provides instructions on how to use the .so shared library in an Android application.

View on Qualcomm® AI Hub

Get more details on ResNet18's performance across various devices here. Explore all available models on Qualcomm® AI Hub

License

  • The license for the original implementation of ResNet18 can be found here.
  • The license for the compiled assets for on-device deployment can be found here

References

Community