MediaPipe-Face-Detection: Optimized for Mobile Deployment

Detect faces and locate facial features in real-time video and image streams

Designed for sub-millisecond processing, this model predicts bounding boxes and pose skeletons (left eye, right eye, nose tip, mouth, left eye tragion, and right eye tragion) of faces in an image.

This model is an implementation of MediaPipe-Face-Detection found here.

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

Model Details

Model Type: Object detection
Model Stats:
- Input resolution: 256x256
- Number of parameters (MediaPipeFaceDetector): 135K
- Model size (MediaPipeFaceDetector): 565 KB
- Number of parameters (MediaPipeFaceLandmarkDetector): 603K
- Model size (MediaPipeFaceLandmarkDetector): 2.34 MB
- Number of output classes: 6

Model	Device	Chipset	Target Runtime	Inference Time (ms)	Peak Memory Range (MB)	Precision	Primary Compute Unit	Target Model
MediaPipeFaceDetector	Samsung Galaxy S23	Snapdragon® 8 Gen 2	TFLITE	0.549 ms	0 - 6 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	Samsung Galaxy S23	Snapdragon® 8 Gen 2	QNN	0.534 ms	1 - 3 MB	FP16	NPU	MediaPipe-Face-Detection.so
MediaPipeFaceDetector	Samsung Galaxy S23	Snapdragon® 8 Gen 2	ONNX	0.852 ms	0 - 8 MB	FP16	NPU	MediaPipe-Face-Detection.onnx
MediaPipeFaceDetector	Samsung Galaxy S24	Snapdragon® 8 Gen 3	TFLITE	0.407 ms	31 - 55 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	Samsung Galaxy S24	Snapdragon® 8 Gen 3	QNN	0.38 ms	1 - 20 MB	FP16	NPU	MediaPipe-Face-Detection.so
MediaPipeFaceDetector	Samsung Galaxy S24	Snapdragon® 8 Gen 3	ONNX	0.585 ms	0 - 30 MB	FP16	NPU	MediaPipe-Face-Detection.onnx
MediaPipeFaceDetector	Snapdragon 8 Elite QRD	Snapdragon® 8 Elite	TFLITE	0.414 ms	0 - 17 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	Snapdragon 8 Elite QRD	Snapdragon® 8 Elite	QNN	0.343 ms	0 - 20 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	Snapdragon 8 Elite QRD	Snapdragon® 8 Elite	ONNX	0.626 ms	0 - 22 MB	FP16	NPU	MediaPipe-Face-Detection.onnx
MediaPipeFaceDetector	SA7255P ADP	SA7255P	TFLITE	18.713 ms	0 - 14 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	SA7255P ADP	SA7255P	QNN	18.645 ms	1 - 10 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	SA8255 (Proxy)	SA8255P Proxy	TFLITE	0.551 ms	0 - 6 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	SA8255 (Proxy)	SA8255P Proxy	QNN	0.534 ms	1 - 3 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	SA8295P ADP	SA8295P	TFLITE	1.138 ms	0 - 19 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	SA8295P ADP	SA8295P	QNN	1.068 ms	0 - 18 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	SA8650 (Proxy)	SA8650P Proxy	TFLITE	0.549 ms	0 - 6 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	SA8650 (Proxy)	SA8650P Proxy	QNN	0.533 ms	0 - 2 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	SA8775P ADP	SA8775P	TFLITE	1.273 ms	0 - 15 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	SA8775P ADP	SA8775P	QNN	1.184 ms	1 - 10 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	QCS8275 (Proxy)	QCS8275 Proxy	TFLITE	18.713 ms	0 - 14 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	QCS8275 (Proxy)	QCS8275 Proxy	QNN	18.645 ms	1 - 10 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	QCS8550 (Proxy)	QCS8550 Proxy	TFLITE	0.549 ms	0 - 7 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	QCS8550 (Proxy)	QCS8550 Proxy	QNN	0.533 ms	1 - 12 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	QCS9075 (Proxy)	QCS9075 Proxy	TFLITE	1.273 ms	0 - 15 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	QCS9075 (Proxy)	QCS9075 Proxy	QNN	1.184 ms	1 - 10 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	QCS8450 (Proxy)	QCS8450 Proxy	TFLITE	0.812 ms	0 - 24 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceDetector	QCS8450 (Proxy)	QCS8450 Proxy	QNN	0.841 ms	1 - 23 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	Snapdragon X Elite CRD	Snapdragon® X Elite	QNN	0.68 ms	1 - 1 MB	FP16	NPU	Use Export Script
MediaPipeFaceDetector	Snapdragon X Elite CRD	Snapdragon® X Elite	ONNX	0.859 ms	2 - 2 MB	FP16	NPU	MediaPipe-Face-Detection.onnx
MediaPipeFaceLandmarkDetector	Samsung Galaxy S23	Snapdragon® 8 Gen 2	TFLITE	0.199 ms	0 - 5 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	Samsung Galaxy S23	Snapdragon® 8 Gen 2	QNN	0.219 ms	0 - 3 MB	FP16	NPU	MediaPipe-Face-Detection.so
MediaPipeFaceLandmarkDetector	Samsung Galaxy S23	Snapdragon® 8 Gen 2	ONNX	0.377 ms	0 - 8 MB	FP16	NPU	MediaPipe-Face-Detection.onnx
MediaPipeFaceLandmarkDetector	Samsung Galaxy S24	Snapdragon® 8 Gen 3	TFLITE	0.151 ms	0 - 21 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	Samsung Galaxy S24	Snapdragon® 8 Gen 3	QNN	0.157 ms	0 - 21 MB	FP16	NPU	MediaPipe-Face-Detection.so
MediaPipeFaceLandmarkDetector	Samsung Galaxy S24	Snapdragon® 8 Gen 3	ONNX	0.254 ms	0 - 26 MB	FP16	NPU	MediaPipe-Face-Detection.onnx
MediaPipeFaceLandmarkDetector	Snapdragon 8 Elite QRD	Snapdragon® 8 Elite	TFLITE	0.194 ms	0 - 17 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	Snapdragon 8 Elite QRD	Snapdragon® 8 Elite	QNN	0.199 ms	0 - 18 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	Snapdragon 8 Elite QRD	Snapdragon® 8 Elite	ONNX	0.297 ms	0 - 19 MB	FP16	NPU	MediaPipe-Face-Detection.onnx
MediaPipeFaceLandmarkDetector	SA7255P ADP	SA7255P	TFLITE	3.548 ms	0 - 13 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	SA7255P ADP	SA7255P	QNN	3.554 ms	0 - 10 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	SA8255 (Proxy)	SA8255P Proxy	TFLITE	0.19 ms	0 - 9 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	SA8255 (Proxy)	SA8255P Proxy	QNN	0.219 ms	0 - 3 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	SA8295P ADP	SA8295P	TFLITE	0.573 ms	0 - 17 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	SA8295P ADP	SA8295P	QNN	0.575 ms	0 - 18 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	SA8650 (Proxy)	SA8650P Proxy	TFLITE	0.201 ms	0 - 8 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	SA8650 (Proxy)	SA8650P Proxy	QNN	0.22 ms	0 - 2 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	SA8775P ADP	SA8775P	TFLITE	0.51 ms	0 - 12 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	SA8775P ADP	SA8775P	QNN	0.515 ms	0 - 10 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	QCS8275 (Proxy)	QCS8275 Proxy	TFLITE	3.548 ms	0 - 13 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	QCS8275 (Proxy)	QCS8275 Proxy	QNN	3.554 ms	0 - 10 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	QCS8550 (Proxy)	QCS8550 Proxy	TFLITE	0.194 ms	0 - 8 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	QCS8550 (Proxy)	QCS8550 Proxy	QNN	0.218 ms	0 - 4 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	QCS9075 (Proxy)	QCS9075 Proxy	TFLITE	0.51 ms	0 - 12 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	QCS9075 (Proxy)	QCS9075 Proxy	QNN	0.515 ms	0 - 10 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	QCS8450 (Proxy)	QCS8450 Proxy	TFLITE	0.337 ms	0 - 25 MB	FP16	NPU	MediaPipe-Face-Detection.tflite
MediaPipeFaceLandmarkDetector	QCS8450 (Proxy)	QCS8450 Proxy	QNN	0.379 ms	0 - 28 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	Snapdragon X Elite CRD	Snapdragon® X Elite	QNN	0.297 ms	0 - 0 MB	FP16	NPU	Use Export Script
MediaPipeFaceLandmarkDetector	Snapdragon X Elite CRD	Snapdragon® X Elite	ONNX	0.361 ms	2 - 2 MB	FP16	NPU	MediaPipe-Face-Detection.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.mediapipe_face.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.mediapipe_face.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.mediapipe_face.export

Profiling Results
------------------------------------------------------------
MediaPipeFaceDetector
Device                          : Samsung Galaxy S23 (13)
Runtime                         : TFLITE                 
Estimated inference time (ms)   : 0.5                    
Estimated peak memory usage (MB): [0, 6]                 
Total # Ops                     : 111                    
Compute Unit(s)                 : NPU (111 ops)          

------------------------------------------------------------
MediaPipeFaceLandmarkDetector
Device                          : Samsung Galaxy S23 (13)
Runtime                         : TFLITE                 
Estimated inference time (ms)   : 0.2                    
Estimated peak memory usage (MB): [0, 5]                 
Total # Ops                     : 100                    
Compute Unit(s)                 : NPU (100 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.mediapipe_face import Model

# Load the model
model = Model.from_pretrained()
face_detector_model = model.face_detector
face_landmark_detector_model = model.face_landmark_detector

# Device
device = hub.Device("Samsung Galaxy S23")

# Trace model
face_detector_input_shape = face_detector_model.get_input_spec()
face_detector_sample_inputs = face_detector_model.sample_inputs()

traced_face_detector_model = torch.jit.trace(face_detector_model, [torch.tensor(data[0]) for _, data in face_detector_sample_inputs.items()])

# Compile model on a specific device
face_detector_compile_job = hub.submit_compile_job(
    model=traced_face_detector_model ,
    device=device,
    input_specs=face_detector_model.get_input_spec(),
)

# Get target model to run on-device
face_detector_target_model = face_detector_compile_job.get_target_model()
# Trace model
face_landmark_detector_input_shape = face_landmark_detector_model.get_input_spec()
face_landmark_detector_sample_inputs = face_landmark_detector_model.sample_inputs()

traced_face_landmark_detector_model = torch.jit.trace(face_landmark_detector_model, [torch.tensor(data[0]) for _, data in face_landmark_detector_sample_inputs.items()])

# Compile model on a specific device
face_landmark_detector_compile_job = hub.submit_compile_job(
    model=traced_face_landmark_detector_model ,
    device=device,
    input_specs=face_landmark_detector_model.get_input_spec(),
)

# Get target model to run on-device
face_landmark_detector_target_model = face_landmark_detector_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.

face_detector_profile_job = hub.submit_profile_job(
    model=face_detector_target_model,
    device=device,
)
face_landmark_detector_profile_job = hub.submit_profile_job(
    model=face_landmark_detector_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.

face_detector_input_data = face_detector_model.sample_inputs()
face_detector_inference_job = hub.submit_inference_job(
    model=face_detector_target_model,
    device=device,
    inputs=face_detector_input_data,
)
face_detector_inference_job.download_output_data()
face_landmark_detector_input_data = face_landmark_detector_model.sample_inputs()
face_landmark_detector_inference_job = hub.submit_inference_job(
    model=face_landmark_detector_target_model,
    device=device,
    inputs=face_landmark_detector_input_data,
)
face_landmark_detector_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.

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 MediaPipe-Face-Detection's performance across various devices here. Explore all available models on Qualcomm® AI Hub

License

The license for the original implementation of MediaPipe-Face-Detection can be found here.
The license for the compiled assets for on-device deployment can be found here

References

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.