Style LoRA Training | Image to Image

fal-ai/style-lora

Train a style LoRA model and textual inversion model.

Training

Commercial use

Schema

Playground API

About

Fine Tune

1. Calling the API#

Install the client#

The client provides a convenient way to interact with the model API.

npm install --save @fal-ai/client

Migrate to @fal-ai/client

The @fal-ai/serverless-client package has been deprecated in favor of @fal-ai/client. Please check the migration guide for more information.

Setup your API Key#

Set FAL_KEY as an environment variable in your runtime.

export FAL_KEY="YOUR_API_KEY"

Submit a request#

The client API handles the API submit protocol. It will handle the request status updates and return the result when the request is completed.

import { fal } from "@fal-ai/client";

const result = await fal.subscribe("fal-ai/style-lora", {
  input: {
    images_data_url: ""
  },
  logs: true,
  onQueueUpdate: (update) => {
    if (update.status === "IN_PROGRESS") {
      update.logs.map((log) => log.message).forEach(console.log);
    }
  },
});
console.log(result.data);
console.log(result.requestId);

2. Authentication#

The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.

API Key#

In case your app is running in an environment where you cannot set environment variables, you can set the API Key manually as a client configuration.

import { fal } from "@fal-ai/client";

fal.config({
  credentials: "YOUR_FAL_KEY"
});

Protect your API Key

When running code on the client-side (e.g. in a browser, mobile app or GUI applications), make sure to not expose your FAL_KEY. Instead, use a server-side proxy to make requests to the API. For more information, check out our server-side integration guide.

3. Queue#

Long-running requests

For long-running requests, such as training jobs or models with slower inference times, it is recommended to check the Queue status and rely on Webhooks instead of blocking while waiting for the result.

Submit a request#

The client API provides a convenient way to submit requests to the model.

import { fal } from "@fal-ai/client";

const { request_id } = await fal.queue.submit("fal-ai/style-lora", {
  input: {
    images_data_url: ""
  },
  webhookUrl: "https://optional.webhook.url/for/results",
});

Fetch request status#

You can fetch the status of a request to check if it is completed or still in progress.

import { fal } from "@fal-ai/client";

const status = await fal.queue.status("fal-ai/style-lora", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
  logs: true,
});

Get the result#

Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.

import { fal } from "@fal-ai/client";

const result = await fal.queue.result("fal-ai/style-lora", {
  requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);

4. Files#

Some attributes in the API accept file URLs as input. Whenever that's the case you can pass your own URL or a Base64 data URI.

Data URI (base64)#

You can pass a Base64 data URI as a file input. The API will handle the file decoding for you. Keep in mind that for large files, this alternative although convenient can impact the request performance.

Hosted files (URL)#

You can also pass your own URLs as long as they are publicly accessible. Be aware that some hosts might block cross-site requests, rate-limit, or consider the request as a bot.

Uploading files#

We provide a convenient file storage that allows you to upload files and use them in your requests. You can upload files using the client API and use the returned URL in your requests.

import { fal } from "@fal-ai/client";

const file = new File(["Hello, World!"], "hello.txt", { type: "text/plain" });
const url = await fal.storage.upload(file);

Auto uploads

The client will auto-upload the file for you if you pass a binary object (e.g. File, Data).

Read more about file handling in our file upload guide.

5. Schema#

Input#

images_data_url string* required

URL to zip archive with images of a consistent style. Try to use at least 10 images, although more is better.

data_archive_format string

File format to archive training artifacts

captions_file_url string

URL to a jsonl file with captions. Each line should contain a json object with a 'file_name' field that matches a file name in the images_data_url archive. It should also have a 'text' field with the caption. The captions should have TOK, TOK1, etc in them.

The file should have lines that look like this:

{"file_name": "image1.jpg", "text": "In the style of TOK A picture of a cat."} {"file_name": "image2.jpg", "text": "In the style of TOK A picture of a dog."}

If a caption file is not provided captions will be generated with Llava with the TOK prepended to the start.

caption_column string

The column in the captions file that contains the captions. Default is text. Default value: "text"

instance_prompt string

The prompt to use for generating the image. Default to None and per image captions. Default value: "In the style of TOK"

rank integer

Rank of the model. Default is 32. Default value: 32

model_url string

Path to pretrained model or model identifier from huggingface.co/models. Default is stabilityai/stable-diffusion-xl-base-1.0 Default value: "stabilityai/stable-diffusion-xl-base-1.0"

vae_url string

Path to pretrained VAE model with better numerical stability. Default is madebyollin/sdxl-vae-fp16-fix Default value: "madebyollin/sdxl-vae-fp16-fix"

revision string

Revision of pretrained model identifier from huggingface.co/models. Default is None.

variant string

Variant of the model files of the pretrained model identifier from huggingface.co/models. Default is fp16.

token_abstraction string

Identifier specifying the instance. Default is TOK Default value: "TOK"

num_new_tokens_per_abstraction integer

Number of new tokens inserted to the tokenizers per token_abstraction identifier. Default is 2. Default value: 2

seed integer

A seed for reproducible training. Default is 42. Default value: 42

resolution_width integer

The resolution for the width for input images. Default is 512 Default value: 512

resolution_height integer

The resolution for the height for input images. Default is 512 Default value: 512

center_crop boolean

Whether to center crop input images. Default is False.

random_flip boolean

Whether to randomly flip images horizontally. Default is False.

train_text_encoder boolean

Whether to train the text encoder. Default is False since textual inversion is used by default.

num_train_epochs integer

Number of training epochs. Default is None in which case max_train_steps is used.

max_train_steps integer

Total number of training steps to perform. Default is 1000. Default value: 1000

learning_rate float

Initial learning rate for the unet. Default is 1e-4 Default value: 0.0001

text_encoder_lr float

Text encoder learning rate. Default is 3e-4. Default value: 0.0003

lr_scheduler string

The scheduler type to use. Default is constant. Default value: "constant"

snr_gamma float

SNR weighting gamma for rebalancing the loss.

lr_warmup_steps integer

Number of steps for the warmup in the lr scheduler. Default is 500. Default value: 500

lr_num_cycles integer

Number of hard resets in the lr scheduler. Default is 1. Default value: 1

lr_power float

Power factor of the polynomial scheduler. Default is 1.0. Default value: 1

train_text_encoder_ti boolean

Whether to use textual inversion. Default is True Default value: true

train_text_encoder_ti_frac float

Percentage of epochs to perform textual inversion. Default is 0.5 Default value: 0.5

train_text_encoder_frac float

Percentage of epochs to perform text encoder tuning. Default is 1.0. Default value: 1

optimizer string

The optimizer type to use. Default is prodigy. Default value: "adamw"

adam_beta1 float

The beta1 parameter for the Adam optimizer. Default is 0.9. Default value: 0.9

adam_beta2 float

The beta2 parameter for the Adam optimizer. Default is 0.999. Default value: 0.999

prodigy_beta3 float

Coefficients for Prodigy optimizer. Default is None.

prodigy_decouple boolean

Use AdamW style decoupled weight decay. Default is True. Default value: true

adam_weight_decay float

Weight decay for unet params. Default is 1e-4. Default value: 0.0001

adam_weight_decay_text_encoder float

Weight decay for text encoder. Default is 1e-3. Default value: 0.001

adam_epsilon float

Epsilon value for the optimizer. Default value: 1e-8

prodigy_use_bias_correction boolean

Use bias correction for Prodigy optimizer. Default is True. Default value: true

prodigy_safeguard_warmup boolean

Remove lr from the denominator of D estimate for Prodigy optimizer. Default value: true

batch_size integer

Batch size for training. Default is 4. Default value: 4

caption_dropout float

Percentage of captions to drop. Default is 0.0.

skip_caption_generation boolean

Whether to skip caption generation. Default is False. This only applies if no captions file is provided.

use_subject_mask string

Whether to use a subject mask. Default is None. Default value: "none"

custom_subject_mask_prompt string

Custom prompt for the subject mask. For this to take affect you must set use_subject_mask to "custom". Default is None.

subject_mask_temp float

Temperature for the subject mask. Default is 1.0. Default value: 1

max_grad_norm float

Maximum gradient norm for clipping. Default is 1.0. Default value: 1

{
  "images_data_url": "",
  "caption_column": "text",
  "instance_prompt": "In the style of TOK",
  "rank": 32,
  "model_url": "stabilityai/stable-diffusion-xl-base-1.0",
  "vae_url": "madebyollin/sdxl-vae-fp16-fix",
  "token_abstraction": "TOK",
  "num_new_tokens_per_abstraction": 2,
  "seed": 42,
  "resolution_width": 512,
  "resolution_height": 512,
  "max_train_steps": 1000,
  "learning_rate": 0.0001,
  "text_encoder_lr": 0.0003,
  "lr_scheduler": "constant",
  "lr_warmup_steps": 500,
  "lr_num_cycles": 1,
  "lr_power": 1,
  "train_text_encoder_ti": true,
  "train_text_encoder_ti_frac": 0.5,
  "train_text_encoder_frac": 1,
  "optimizer": "adamw",
  "adam_beta1": 0.9,
  "adam_beta2": 0.999,
  "prodigy_decouple": true,
  "adam_weight_decay": 0.0001,
  "adam_weight_decay_text_encoder": 0.001,
  "adam_epsilon": 1e-8,
  "prodigy_use_bias_correction": true,
  "prodigy_safeguard_warmup": true,
  "batch_size": 4,
  "use_subject_mask": "none",
  "subject_mask_temp": 1,
  "max_grad_norm": 1
}

Output#

diffusers_lora_file File* required

URL to the trained diffusers lora weights.

kohya_lora_file File* required

URL to the trained kohya lora weights.

embeddings_file File* required

URL to the trained text embeddings if .

config_file File* required

URL to the training configuration file.

{
  "diffusers_lora_file": {
    "url": "",
    "content_type": "image/png",
    "file_name": "z9RV14K95DvU.png",
    "file_size": 4404019
  },
  "kohya_lora_file": {
    "url": "",
    "content_type": "image/png",
    "file_name": "z9RV14K95DvU.png",
    "file_size": 4404019
  },
  "embeddings_file": {
    "url": "",
    "content_type": "image/png",
    "file_name": "z9RV14K95DvU.png",
    "file_size": 4404019
  },
  "config_file": {
    "url": "",
    "content_type": "image/png",
    "file_name": "z9RV14K95DvU.png",
    "file_size": 4404019
  }
}

Other types#

File#

url string* required

The URL where the file can be downloaded from.

content_type string

The mime type of the file.

file_name string

The name of the file. It will be auto-generated if not provided.

file_size integer

The size of the file in bytes.

Style LoRA Training Image to Image

Table of contents

1. Calling the API

2. Authentication

3. Queue

4. Files

5. Schema

About

1. Calling the API#

Install the client#

Migrate to @fal-ai/client

Setup your API Key#

Submit a request#

2. Authentication#

API Key#

Protect your API Key

3. Queue#

Long-running requests

Submit a request#

Fetch request status#

Get the result#

4. Files#

Data URI (base64)#

Hosted files (URL)#

Uploading files#

Auto uploads

5. Schema#

Input#

Output#

Other types#

File#