FastSam-S: Optimized for Mobile Deployment

Generate high quality segmentation mask on device

The Fast Segment Anything Model (FastSAM) is a novel, real-time CNN-based solution for the Segment Anything task. This task is designed to segment any object within an image based on various possible user interaction prompts. The model performs competitively despite significantly reduced computation, making it a practical choice for a variety of vision tasks.

This model is an implementation of FastSam-S found here.

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

Model Details

Model Type: Semantic segmentation
Model Stats:
- Model checkpoint: fastsam-s.pt
- Inference latency: RealTime
- Input resolution: 640x640
- Number of parameters: 11.8M
- Model size: 45.1 MB

Model	Device	Chipset	Target Runtime	Inference Time (ms)	Peak Memory Range (MB)	Precision	Primary Compute Unit	Target Model
FastSam-S	Samsung Galaxy S23	Snapdragon® 8 Gen 2	QNN	8.107 ms	5 - 19 MB	FP16	NPU	FastSam-S.so
FastSam-S	Samsung Galaxy S23	Snapdragon® 8 Gen 2	ONNX	9.468 ms	0 - 21 MB	FP16	NPU	FastSam-S.onnx
FastSam-S	Samsung Galaxy S24	Snapdragon® 8 Gen 3	QNN	6.167 ms	5 - 41 MB	FP16	NPU	FastSam-S.so
FastSam-S	Samsung Galaxy S24	Snapdragon® 8 Gen 3	ONNX	6.778 ms	15 - 98 MB	FP16	NPU	FastSam-S.onnx
FastSam-S	Snapdragon 8 Elite QRD	Snapdragon® 8 Elite	QNN	5.494 ms	5 - 36 MB	FP16	NPU	Use Export Script
FastSam-S	Snapdragon 8 Elite QRD	Snapdragon® 8 Elite	ONNX	6.374 ms	14 - 59 MB	FP16	NPU	FastSam-S.onnx
FastSam-S	QCS8550 (Proxy)	QCS8550 Proxy	QNN	7.625 ms	5 - 7 MB	FP16	NPU	Use Export Script
FastSam-S	SA8255 (Proxy)	SA8255P Proxy	QNN	7.601 ms	5 - 9 MB	FP16	NPU	Use Export Script
FastSam-S	SA8775 (Proxy)	SA8775P Proxy	QNN	7.667 ms	7 - 9 MB	FP16	NPU	Use Export Script
FastSam-S	SA8650 (Proxy)	SA8650P Proxy	QNN	7.686 ms	6 - 10 MB	FP16	NPU	Use Export Script
FastSam-S	SA8295P ADP	SA8295P	QNN	14.075 ms	0 - 6 MB	FP16	NPU	Use Export Script
FastSam-S	QCS8450 (Proxy)	QCS8450 Proxy	QNN	13.593 ms	5 - 41 MB	FP16	NPU	Use Export Script
FastSam-S	Snapdragon X Elite CRD	Snapdragon® X Elite	QNN	8.254 ms	5 - 5 MB	FP16	NPU	Use Export Script
FastSam-S	Snapdragon X Elite CRD	Snapdragon® X Elite	ONNX	9.924 ms	21 - 21 MB	FP16	NPU	FastSam-S.onnx

Installation

This model can be installed as a Python package via pip.

pip install "qai-hub-models[fastsam_s]"

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.fastsam_s.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.fastsam_s.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.fastsam_s.export

Profiling Results
------------------------------------------------------------
FastSam-S
Device                          : Samsung Galaxy S23 (13)
Runtime                         : QNN                    
Estimated inference time (ms)   : 8.1                    
Estimated peak memory usage (MB): [5, 19]                
Total # Ops                     : 286                    
Compute Unit(s)                 : NPU (286 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.fastsam_s 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.

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.fastsam_s.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.fastsam_s.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 FastSam-S's performance across various devices here. Explore all available models on Qualcomm® AI Hub

License

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

References

Community

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For questions or feedback please reach out to us.