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ControlNet

Unconditional Image Generation
PyTorch
generative_ai
quantized
android
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ControlNet: Optimized for Mobile Deployment

Generating visual arts from text prompt and input guiding image

On-device, high-resolution image synthesis from text and image prompts. ControlNet guides Stable-diffusion with provided input image to generate accurate images from given input prompt.

This model is an implementation of ControlNet found here.

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

Model Details

  • Model Type: Image generation
  • Model Stats:
    • Input: Text prompt and input image as a reference
    • Conditioning Input: Canny-Edge
    • Text Encoder Number of parameters: 340M
    • UNet Number of parameters: 865M
    • VAE Decoder Number of parameters: 83M
    • ControlNet Number of parameters: 361M
    • Model size: 1.4GB
Model Device Chipset Target Runtime Inference Time (ms) Peak Memory Range (MB) Precision Primary Compute Unit Target Model
TextEncoder_Quantized Samsung Galaxy S23 Snapdragon® 8 Gen 2 QNN 11.394 ms 0 - 74 MB UINT16 NPU ControlNet.bin
TextEncoder_Quantized Samsung Galaxy S24 Snapdragon® 8 Gen 3 QNN 8.08 ms 0 - 137 MB UINT16 NPU ControlNet.bin
TextEncoder_Quantized QCS8550 (Proxy) QCS8550 Proxy QNN 10.982 ms 0 - 1 MB UINT16 NPU Use Export Script
UNet_Quantized Samsung Galaxy S23 Snapdragon® 8 Gen 2 QNN 262.52 ms 11 - 17 MB UINT16 NPU ControlNet.bin
UNet_Quantized Samsung Galaxy S24 Snapdragon® 8 Gen 3 QNN 192.789 ms 3 - 1247 MB UINT16 NPU ControlNet.bin
UNet_Quantized QCS8550 (Proxy) QCS8550 Proxy QNN 260.158 ms 14 - 15 MB UINT16 NPU Use Export Script
VAEDecoder_Quantized Samsung Galaxy S23 Snapdragon® 8 Gen 2 QNN 390.243 ms 0 - 36 MB UINT16 NPU ControlNet.bin
VAEDecoder_Quantized Samsung Galaxy S24 Snapdragon® 8 Gen 3 QNN 294.404 ms 0 - 88 MB UINT16 NPU ControlNet.bin
VAEDecoder_Quantized QCS8550 (Proxy) QCS8550 Proxy QNN 379.548 ms 0 - 1 MB UINT16 NPU Use Export Script
ControlNet_Quantized Samsung Galaxy S23 Snapdragon® 8 Gen 2 QNN 100.33 ms 2 - 68 MB UINT16 NPU ControlNet.bin
ControlNet_Quantized Samsung Galaxy S24 Snapdragon® 8 Gen 3 QNN 76.94 ms 0 - 533 MB UINT16 NPU ControlNet.bin
ControlNet_Quantized QCS8550 (Proxy) QCS8550 Proxy QNN 103.52 ms 2 - 3 MB UINT16 NPU Use Export Script

Installation

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

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

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 on-device

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.controlnet_quantized.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.controlnet_quantized.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.controlnet_quantized.export

Profiling Results
------------------------------------------------------------
TextEncoder_Quantized
Device                          : Samsung Galaxy S23 (13)
Runtime                         : QNN                    
Estimated inference time (ms)   : 11.4                   
Estimated peak memory usage (MB): [0, 74]                
Total # Ops                     : 570                    
Compute Unit(s)                 : NPU (570 ops)          

------------------------------------------------------------
UNet_Quantized
Device                          : Samsung Galaxy S23 (13)
Runtime                         : QNN                    
Estimated inference time (ms)   : 262.5                  
Estimated peak memory usage (MB): [11, 17]               
Total # Ops                     : 5434                   
Compute Unit(s)                 : NPU (5434 ops)         

------------------------------------------------------------
VAEDecoder_Quantized
Device                          : Samsung Galaxy S23 (13)
Runtime                         : QNN                    
Estimated inference time (ms)   : 390.2                  
Estimated peak memory usage (MB): [0, 36]                
Total # Ops                     : 409                    
Compute Unit(s)                 : NPU (409 ops)          

------------------------------------------------------------
ControlNet_Quantized
Device                          : Samsung Galaxy S23 (13)
Runtime                         : QNN                    
Estimated inference time (ms)   : 100.3                  
Estimated peak memory usage (MB): [2, 68]                
Total # Ops                     : 2406                   
Compute Unit(s)                 : NPU (2406 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.controlnet_quantized import Model

# Load the model
model = Model.from_pretrained()
controlnet_model = model.controlnet
text_encoder_model = model.text_encoder
unet_model = model.unet
vae_decoder_model = model.vae_decoder

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

# Trace model
controlnet_input_shape = controlnet_model.get_input_spec()
controlnet_sample_inputs = controlnet_model.sample_inputs()

traced_controlnet_model = torch.jit.trace(controlnet_model, [torch.tensor(data[0]) for _, data in controlnet_sample_inputs.items()])

# Compile model on a specific device
controlnet_compile_job = hub.submit_compile_job(
    model=traced_controlnet_model ,
    device=device,
    input_specs=controlnet_model.get_input_spec(),
)

# Get target model to run on-device
controlnet_target_model = controlnet_compile_job.get_target_model()
# Trace model
text_encoder_input_shape = text_encoder_model.get_input_spec()
text_encoder_sample_inputs = text_encoder_model.sample_inputs()

traced_text_encoder_model = torch.jit.trace(text_encoder_model, [torch.tensor(data[0]) for _, data in text_encoder_sample_inputs.items()])

# Compile model on a specific device
text_encoder_compile_job = hub.submit_compile_job(
    model=traced_text_encoder_model ,
    device=device,
    input_specs=text_encoder_model.get_input_spec(),
)

# Get target model to run on-device
text_encoder_target_model = text_encoder_compile_job.get_target_model()
# Trace model
unet_input_shape = unet_model.get_input_spec()
unet_sample_inputs = unet_model.sample_inputs()

traced_unet_model = torch.jit.trace(unet_model, [torch.tensor(data[0]) for _, data in unet_sample_inputs.items()])

# Compile model on a specific device
unet_compile_job = hub.submit_compile_job(
    model=traced_unet_model ,
    device=device,
    input_specs=unet_model.get_input_spec(),
)

# Get target model to run on-device
unet_target_model = unet_compile_job.get_target_model()
# Trace model
vae_decoder_input_shape = vae_decoder_model.get_input_spec()
vae_decoder_sample_inputs = vae_decoder_model.sample_inputs()

traced_vae_decoder_model = torch.jit.trace(vae_decoder_model, [torch.tensor(data[0]) for _, data in vae_decoder_sample_inputs.items()])

# Compile model on a specific device
vae_decoder_compile_job = hub.submit_compile_job(
    model=traced_vae_decoder_model ,
    device=device,
    input_specs=vae_decoder_model.get_input_spec(),
)

# Get target model to run on-device
vae_decoder_target_model = vae_decoder_compile_job.get_target_model()

Step 2: Performance profiling on cloud-hosted device

After uploading compiled 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.


# Device
device = hub.Device("Samsung Galaxy S23")
profile_job_controlnet_quantized = hub.submit_profile_job(
    model=model_controlnet_quantized,
    device=device,
)
profile_job_textencoder_quantized = hub.submit_profile_job(
    model=model_textencoder_quantized,
    device=device,
)
profile_job_unet_quantized = hub.submit_profile_job(
    model=model_unet_quantized,
    device=device,
)
profile_job_vaedecoder_quantized = hub.submit_profile_job(
    model=model_vaedecoder_quantized,
    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_controlnet_quantized = model.controlnet.sample_inputs()
inference_job_controlnet_quantized = hub.submit_inference_job(
    model=model_controlnet_quantized,
    device=device,
    inputs=input_data_controlnet_quantized,
)
on_device_output_controlnet_quantized = inference_job_controlnet_quantized.download_output_data()

input_data_textencoder_quantized = model.text_encoder.sample_inputs()
inference_job_textencoder_quantized = hub.submit_inference_job(
    model=model_textencoder_quantized,
    device=device,
    inputs=input_data_textencoder_quantized,
)
on_device_output_textencoder_quantized = inference_job_textencoder_quantized.download_output_data()

input_data_unet_quantized = model.unet.sample_inputs()
inference_job_unet_quantized = hub.submit_inference_job(
    model=model_unet_quantized,
    device=device,
    inputs=input_data_unet_quantized,
)
on_device_output_unet_quantized = inference_job_unet_quantized.download_output_data()

input_data_vaedecoder_quantized = model.vae_decoder.sample_inputs()
inference_job_vaedecoder_quantized = hub.submit_inference_job(
    model=model_vaedecoder_quantized,
    device=device,
    inputs=input_data_vaedecoder_quantized,
)
on_device_output_vaedecoder_quantized = inference_job_vaedecoder_quantized.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 / .bin export ): This sample app provides instructions on how to use the .so shared library or .bin context binary in an Android application.

View on Qualcomm® AI Hub

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

License

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

References

Community

Usage and Limitations

Model may not be used for or in connection with any of the following applications:

  • Accessing essential private and public services and benefits;
  • Administration of justice and democratic processes;
  • Assessing or recognizing the emotional state of a person;
  • Biometric and biometrics-based systems, including categorization of persons based on sensitive characteristics;
  • Education and vocational training;
  • Employment and workers management;
  • Exploitation of the vulnerabilities of persons resulting in harmful behavior;
  • General purpose social scoring;
  • Law enforcement;
  • Management and operation of critical infrastructure;
  • Migration, asylum and border control management;
  • Predictive policing;
  • Real-time remote biometric identification in public spaces;
  • Recommender systems of social media platforms;
  • Scraping of facial images (from the internet or otherwise); and/or
  • Subliminal manipulation
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