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README.md

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+---
+library_name: pytorch
+license: bsd-3-clause
+pipeline_tag: image-classification
+tags:
+- backbone
+- real_time
+- android
+
+---
+
+![](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/models/efficientvit_b2_cls/web-assets/model_demo.png)
+
+# EfficientViT-b2-cls: Optimized for Mobile Deployment
+## Imagenet classifier and general purpose backbone
+
+
+EfficientViT 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 EfficientViT-b2-cls found [here](https://github.com/CVHub520/efficientvit).
+
+
+This repository provides scripts to run EfficientViT-b2-cls on Qualcomm® devices.
+More details on model performance across various devices, can be found
+[here](https://aihub.qualcomm.com/models/efficientvit_b2_cls).
+
+
+### Model Details
+
+- **Model Type:** Image classification
+- **Model Stats:**
+  - Model checkpoint: Imagenet
+  - Input resolution: 224x224
+  - Number of parameters: 24M
+  - Model size: 200 MB
+
+| Model | Device | Chipset | Target Runtime | Inference Time (ms) | Peak Memory Range (MB) | Precision | Primary Compute Unit | Target Model
+|---|---|---|---|---|---|---|---|---|
+| EfficientViT-b2-cls | Samsung Galaxy S23 | Snapdragon® 8 Gen 2 | TFLITE | 7.02 ms | 0 - 3 MB | FP16 | NPU | [EfficientViT-b2-cls.tflite](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.tflite) |
+| EfficientViT-b2-cls | Samsung Galaxy S23 | Snapdragon® 8 Gen 2 | QNN | 7.832 ms | 0 - 34 MB | FP16 | NPU | [EfficientViT-b2-cls.so](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.so) |
+| EfficientViT-b2-cls | Samsung Galaxy S23 | Snapdragon® 8 Gen 2 | ONNX | 6.869 ms | 0 - 58 MB | FP16 | NPU | [EfficientViT-b2-cls.onnx](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.onnx) |
+| EfficientViT-b2-cls | Samsung Galaxy S24 | Snapdragon® 8 Gen 3 | TFLITE | 4.658 ms | 0 - 193 MB | FP16 | NPU | [EfficientViT-b2-cls.tflite](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.tflite) |
+| EfficientViT-b2-cls | Samsung Galaxy S24 | Snapdragon® 8 Gen 3 | QNN | 5.206 ms | 1 - 36 MB | FP16 | NPU | [EfficientViT-b2-cls.so](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.so) |
+| EfficientViT-b2-cls | Samsung Galaxy S24 | Snapdragon® 8 Gen 3 | ONNX | 4.44 ms | 1 - 240 MB | FP16 | NPU | [EfficientViT-b2-cls.onnx](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.onnx) |
+| EfficientViT-b2-cls | Snapdragon 8 Elite QRD | Snapdragon® 8 Elite | TFLITE | 4.868 ms | 0 - 52 MB | FP16 | NPU | [EfficientViT-b2-cls.tflite](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.tflite) |
+| EfficientViT-b2-cls | Snapdragon 8 Elite QRD | Snapdragon® 8 Elite | QNN | 4.531 ms | 0 - 35 MB | FP16 | NPU | Use Export Script |
+| EfficientViT-b2-cls | Snapdragon 8 Elite QRD | Snapdragon® 8 Elite | ONNX | 4.721 ms | 0 - 70 MB | FP16 | NPU | [EfficientViT-b2-cls.onnx](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.onnx) |
+| EfficientViT-b2-cls | QCS8550 (Proxy) | QCS8550 Proxy | TFLITE | 7.06 ms | 0 - 2 MB | FP16 | NPU | [EfficientViT-b2-cls.tflite](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.tflite) |
+| EfficientViT-b2-cls | QCS8550 (Proxy) | QCS8550 Proxy | QNN | 7.48 ms | 1 - 2 MB | FP16 | NPU | Use Export Script |
+| EfficientViT-b2-cls | QCS8450 (Proxy) | QCS8450 Proxy | TFLITE | 8.143 ms | 0 - 188 MB | FP16 | NPU | [EfficientViT-b2-cls.tflite](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.tflite) |
+| EfficientViT-b2-cls | QCS8450 (Proxy) | QCS8450 Proxy | QNN | 8.909 ms | 1 - 37 MB | FP16 | NPU | Use Export Script |
+| EfficientViT-b2-cls | Snapdragon X Elite CRD | Snapdragon® X Elite | QNN | 7.943 ms | 1 - 1 MB | FP16 | NPU | Use Export Script |
+| EfficientViT-b2-cls | Snapdragon X Elite CRD | Snapdragon® X Elite | ONNX | 7.498 ms | 51 - 51 MB | FP16 | NPU | [EfficientViT-b2-cls.onnx](https://huggingface.co/qualcomm/EfficientViT-b2-cls/blob/main/EfficientViT-b2-cls.onnx) |
+
+
+
+
+## Installation
+
+This model can be installed as a Python package via pip.
+
+```bash
+pip install "qai-hub-models[efficientvit_b2_cls]"
+```
+
+
+
+## Configure Qualcomm® AI Hub to run this model on a cloud-hosted device
+
+Sign-in to [Qualcomm® AI Hub](https://app.aihub.qualcomm.com/) 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.
+```bash
+qai-hub configure --api_token API_TOKEN
+```
+Navigate to [docs](https://app.aihub.qualcomm.com/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.
+
+```bash
+python -m qai_hub_models.models.efficientvit_b2_cls.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.efficientvit_b2_cls.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.
+
+```bash
+python -m qai_hub_models.models.efficientvit_b2_cls.export
+```
+```
+Profiling Results
+------------------------------------------------------------
+EfficientViT-b2-cls
+Device                          : Samsung Galaxy S23 (13)
+Runtime                         : TFLITE                 
+Estimated inference time (ms)   : 7.0                    
+Estimated peak memory usage (MB): [0, 3]                 
+Total # Ops                     : 379                    
+Compute Unit(s)                 : NPU (379 ops)          
+```
+
+
+## How does this work?
+
+This [export script](https://aihub.qualcomm.com/models/efficientvit_b2_cls/qai_hub_models/models/EfficientViT-b2-cls/export.py)
+leverages [Qualcomm® AI Hub](https://aihub.qualcomm.com/) 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.
+
+```python
+import torch
+
+import qai_hub as hub
+from qai_hub_models.models.efficientvit_b2_cls import 
+
+# Load the model
+
+# Device
+device = hub.Device("Samsung Galaxy S23")
+
+
+```
+
+
+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.
+```python
+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.
+```python
+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](https://myaccount.qualcomm.com/signup).
+
+
+
+## Run demo on a cloud-hosted device
+
+You can also run the demo on-device.
+
+```bash
+python -m qai_hub_models.models.efficientvit_b2_cls.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.efficientvit_b2_cls.demo -- --on-device
+```
+
+
+## Deploying compiled model to Android
+
+
+The models can be deployed using multiple runtimes:
+- TensorFlow Lite (`.tflite` export): [This
+  tutorial](https://www.tensorflow.org/lite/android/quickstart) provides a
+  guide to deploy the .tflite model in an Android application.
+
+
+- QNN (`.so` export ): This [sample
+  app](https://docs.qualcomm.com/bundle/publicresource/topics/80-63442-50/sample_app.html)
+provides instructions on how to use the `.so` shared library  in an Android application.
+
+
+## View on Qualcomm® AI Hub
+Get more details on EfficientViT-b2-cls's performance across various devices [here](https://aihub.qualcomm.com/models/efficientvit_b2_cls).
+Explore all available models on [Qualcomm® AI Hub](https://aihub.qualcomm.com/)
+
+
+## License
+* The license for the original implementation of EfficientViT-b2-cls can be found [here](https://github.com/CVHub520/efficientvit/blob/main/LICENSE).
+* The license for the compiled assets for on-device deployment can be found [here](https://qaihub-public-assets.s3.us-west-2.amazonaws.com/qai-hub-models/Qualcomm+AI+Hub+Proprietary+License.pdf)
+
+
+
+## References
+* [EfficientViT: Multi-Scale Linear Attention for High-Resolution Dense Prediction](https://arxiv.org/abs/2205.14756)
+* [Source Model Implementation](https://github.com/CVHub520/efficientvit)
+
+
+
+## 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).
+
+