Fooocus Upscale or Vary Text to Image
About
Upscale Or Vary
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/fooocus/upscale-or-vary", {
input: {
uov_image_url: "https://storage.googleapis.com/falserverless/model_tests/fooocus/fruit_basket.jpeg"
},
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#
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#
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/fooocus/upscale-or-vary", {
input: {
uov_image_url: "https://storage.googleapis.com/falserverless/model_tests/fooocus/fruit_basket.jpeg"
},
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/fooocus/upscale-or-vary", {
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/fooocus/upscale-or-vary", {
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#
prompt
 string
The prompt to use for generating the image. Be as descriptive as possible for best results. Default value: ""
negative_prompt
 string
The negative prompt to use. Use it to address details that you don't want
in the image. This could be colors, objects, scenery and even the small details
(e.g. moustache, blurry, low resolution). Default value: ""
The style to use. Default value: Fooocus Enhance,Fooocus V2,Fooocus Sharp
performance
 PerformanceEnum
You can choose Speed or Quality Default value: "Extreme Speed"
Possible enum values: Speed, Quality, Extreme Speed, Lightning
guidance_scale
 float
The CFG (Classifier Free Guidance) scale is a measure of how close you want
the model to stick to your prompt when looking for a related image to show you. Default value: 4
sharpness
 float
The sharpness of the generated image. Use it to control how sharp the generated
image should be. Higher value means image and texture are sharper. Default value: 2
aspect_ratio
 string
The size of the generated image. You can choose between some presets or
custom height and width that must be multiples of 8. Default value: "1024x1024"
num_images
 integer
Number of images to generate in one request Default value: 1
The LoRAs to use for the image generation. You can use up to 5 LoRAs
and they will be merged together to generate the final image. Default value: [object Object]
refiner_model
 RefinerModelEnum
Refiner (SDXL or SD 1.5) Default value: "None"
Possible enum values: None, realisticVisionV60B1_v51VAE.safetensors
refiner_switch
 float
Use 0.4 for SD1.5 realistic models; 0.667 for SD1.5 anime models
0.8 for XL-refiners; or any value for switching two SDXL models. Default value: 0.8
output_format
 OutputFormatEnum
The format of the generated image. Default value: "jpeg"
Possible enum values: png, jpeg, webp
sync_mode
 boolean
If set to true, the function will wait for the image to be generated and uploaded before returning the response. This will increase the latency of the function but it allows you to get the image directly in the response without going through the CDN.
seed
 integer
The same seed and the same prompt given to the same version of Stable Diffusion will output the same image every time.
uov_image_url
 string
* requiredThe image to upscale or vary.
uov_method
 UOVMethodEnum
The method to use for upscaling or varying. Default value: "Vary (Strong)"
Possible enum values: Disabled, Vary (Subtle), Vary (Strong), Upscale (1.5x), Upscale (2x), Upscale (Fast 2x)
mixing_image_prompt_and_vary_upscale
 boolean
Mixing Image Prompt and Vary/Upscale
enable_safety_checker
 boolean
If set to false, the safety checker will be disabled. Default value: true
{
"prompt": "a basket of various fruits, bokeh, realistic, masterpiece",
"negative_prompt": "(worst quality, low quality, normal quality, lowres, low details, oversaturated, undersaturated, overexposed, underexposed, grayscale, bw, bad photo, bad photography, bad art:1.4), (watermark, signature, text font, username, error, logo, words, letters, digits, autograph, trademark, name:1.2), (blur, blurry, grainy), morbid, ugly, asymmetrical, mutated malformed, mutilated, poorly lit, bad shadow, draft, cropped, out of frame, cut off, censored, jpeg artifacts, out of focus, glitch, duplicate, (airbrushed, cartoon, anime, semi-realistic, cgi, render, blender, digital art, manga, amateur:1.3), (3D ,3D Game, 3D Game Scene, 3D Character:1.1), (bad hands, bad anatomy, bad body, bad face, bad teeth, bad arms, bad legs, deformities:1.3)",
"styles": [
"Fooocus Enhance",
"Fooocus V2",
"Fooocus Sharp"
],
"performance": "Extreme Speed",
"guidance_scale": 4,
"sharpness": 2,
"aspect_ratio": "1024x1024",
"num_images": 1,
"loras": [
{
"path": "https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0/resolve/main/sd_xl_offset_example-lora_1.0.safetensors",
"scale": 0.1
}
],
"refiner_model": "None",
"refiner_switch": 0.8,
"output_format": "jpeg",
"seed": 176400,
"uov_image_url": "https://storage.googleapis.com/falserverless/model_tests/fooocus/fruit_basket.jpeg",
"uov_method": "Vary (Strong)",
"enable_safety_checker": true
}
Output#
The generated image file info.
The time taken for the generation process.
Whether the generated images contain NSFW concepts.
{
"images": [
{
"url": "",
"content_type": "image/png",
"file_name": "z9RV14K95DvU.png",
"file_size": 4404019,
"width": 1024,
"height": 1024
}
]
}
Other types#
Image#
url
 string
* requiredThe 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.
file_data
 string
File data
width
 integer
The width of the image in pixels.
height
 integer
The height of the image in pixels.
ImagePrompt#
type
 TypeEnum
Default value: "ImagePrompt"
Possible enum values: ImagePrompt, PyraCanny, CPDS, FaceSwap
image_url
 string
stop_at
 float
Default value: 0.5
weight
 float
Default value: 1
LoraWeight#
path
 string
* requiredURL or the path to the LoRA weights.
scale
 float
The scale of the LoRA weight. This is used to scale the LoRA weight
before merging it with the base model. Default value: 0.1
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