ControlNet Preprocess Lineart

May 1, 2025

ControlNet Preprocess Lineart extracts simplified line art from an input image for ControlNet conditioning. It is useful when the goal is to preserve contours, composition, and object shapes while translating the result into illustration, concept art, or other stylized outputs.

lineart-extraction

Avalanche Patrol Portrait Line-Art Guide$0.0006~5s

Try in Playground

import { createClient } from '@runware/sdk'

const client = await createClient({ apiKey: process.env.RUNWARE_API_KEY })
await client.connect()

const [result] = await client.run({
  model: 'runware:controlnet-preprocess@lineart',
  inputs: {
    image: 'https://assets.runware.ai/assets/inputs/93f868c7-24a9-41aa-98d1-5d4c798852f6.jpg'
  }
})

import asyncio
import os

from runware import Runware


async def main():
    async with Runware(api_key=os.environ["RUNWARE_API_KEY"]) as client:
        results = await client.run({
            "model": "runware:controlnet-preprocess@lineart",
            "inputs": {
                "image": "https://assets.runware.ai/assets/inputs/93f868c7-24a9-41aa-98d1-5d4c798852f6.jpg"
            }
        })


asyncio.run(main())

curl https://api.runware.ai/v1 \
  -H "Authorization: Bearer $RUNWARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "taskType": "controlNetPreprocess",
      "taskUUID": "a6056883-e4f8-4da5-a8b7-954a29212dc4",
      "model": "runware:controlnet-preprocess@lineart",
      "inputs": {
        "image": "https://assets.runware.ai/assets/inputs/93f868c7-24a9-41aa-98d1-5d4c798852f6.jpg"
      }
    }
  ]'

runware run runware:controlnet-preprocess@lineart \
  inputs.image=https://assets.runware.ai/assets/inputs/93f868c7-24a9-41aa-98d1-5d4c798852f6.jpg

{
  "taskType": "controlNetPreprocess",
  "taskUUID": "a6056883-e4f8-4da5-a8b7-954a29212dc4",
  "model": "runware:controlnet-preprocess@lineart",
  "inputs": {
    "image": "https://assets.runware.ai/assets/inputs/93f868c7-24a9-41aa-98d1-5d4c798852f6.jpg"
  }
}

Response

{
  "taskType": "imageControlNetPreProcess",
  "taskUUID": "a6056883-e4f8-4da5-a8b7-954a29212dc4",
  "guideImageURL": "https://im.runware.ai/image/os/a02d21/ws/3/ii/c7390396-dd36-4a53-88c0-24f6eadfeae4.jpg",
  "cost": 0.0006,
  "guideImageUUID": "c7390396-dd36-4a53-88c0-24f6eadfeae4",
  "inputImageUUID": "adced96a-0e7f-4209-82ce-3b9b8849d325"
}

lineart-extraction

Deep-Sea Exhibit Panorama Guide$0.0006~4s

Try in Playground

import { createClient } from '@runware/sdk'

const client = await createClient({ apiKey: process.env.RUNWARE_API_KEY })
await client.connect()

const [result] = await client.run({
  model: 'runware:controlnet-preprocess@lineart',
  inputs: {
    image: 'https://assets.runware.ai/assets/inputs/4692a7a8-3fb2-4786-9d47-89c71c366711.jpg'
  }
})

import asyncio
import os

from runware import Runware


async def main():
    async with Runware(api_key=os.environ["RUNWARE_API_KEY"]) as client:
        results = await client.run({
            "model": "runware:controlnet-preprocess@lineart",
            "inputs": {
                "image": "https://assets.runware.ai/assets/inputs/4692a7a8-3fb2-4786-9d47-89c71c366711.jpg"
            }
        })


asyncio.run(main())

curl https://api.runware.ai/v1 \
  -H "Authorization: Bearer $RUNWARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "taskType": "controlNetPreprocess",
      "taskUUID": "6f599477-81b2-4731-a465-5814210a5d8f",
      "model": "runware:controlnet-preprocess@lineart",
      "inputs": {
        "image": "https://assets.runware.ai/assets/inputs/4692a7a8-3fb2-4786-9d47-89c71c366711.jpg"
      }
    }
  ]'

runware run runware:controlnet-preprocess@lineart \
  inputs.image=https://assets.runware.ai/assets/inputs/4692a7a8-3fb2-4786-9d47-89c71c366711.jpg

{
  "taskType": "controlNetPreprocess",
  "taskUUID": "6f599477-81b2-4731-a465-5814210a5d8f",
  "model": "runware:controlnet-preprocess@lineart",
  "inputs": {
    "image": "https://assets.runware.ai/assets/inputs/4692a7a8-3fb2-4786-9d47-89c71c366711.jpg"
  }
}

Response

{
  "taskType": "imageControlNetPreProcess",
  "taskUUID": "6f599477-81b2-4731-a465-5814210a5d8f",
  "guideImageURL": "https://im.runware.ai/image/os/a07dlim3/ws/3/ii/bf5dafe0-c40f-494e-aa54-cf1b63bb1e7e.jpg",
  "cost": 0.0006,
  "guideImageUUID": "bf5dafe0-c40f-494e-aa54-cf1b63bb1e7e",
  "inputImageUUID": "207d1906-69a8-49de-a4ce-dcf8f8547e0f"
}

lineart-extraction

Hydroelectric Mural Expansion Guide$0.0006~4s

Try in Playground

import { createClient } from '@runware/sdk'

const client = await createClient({ apiKey: process.env.RUNWARE_API_KEY })
await client.connect()

const [result] = await client.run({
  model: 'runware:controlnet-preprocess@lineart',
  inputs: {
    image: 'https://assets.runware.ai/assets/inputs/195cc133-eb24-4eb0-a546-29b189c9c035.jpg'
  }
})

import asyncio
import os

from runware import Runware


async def main():
    async with Runware(api_key=os.environ["RUNWARE_API_KEY"]) as client:
        results = await client.run({
            "model": "runware:controlnet-preprocess@lineart",
            "inputs": {
                "image": "https://assets.runware.ai/assets/inputs/195cc133-eb24-4eb0-a546-29b189c9c035.jpg"
            }
        })


asyncio.run(main())

curl https://api.runware.ai/v1 \
  -H "Authorization: Bearer $RUNWARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "taskType": "controlNetPreprocess",
      "taskUUID": "0b25ed53-f0da-4d6b-b581-d3f1c35923fa",
      "model": "runware:controlnet-preprocess@lineart",
      "inputs": {
        "image": "https://assets.runware.ai/assets/inputs/195cc133-eb24-4eb0-a546-29b189c9c035.jpg"
      }
    }
  ]'

runware run runware:controlnet-preprocess@lineart \
  inputs.image=https://assets.runware.ai/assets/inputs/195cc133-eb24-4eb0-a546-29b189c9c035.jpg

{
  "taskType": "controlNetPreprocess",
  "taskUUID": "0b25ed53-f0da-4d6b-b581-d3f1c35923fa",
  "model": "runware:controlnet-preprocess@lineart",
  "inputs": {
    "image": "https://assets.runware.ai/assets/inputs/195cc133-eb24-4eb0-a546-29b189c9c035.jpg"
  }
}

Response

{
  "taskType": "imageControlNetPreProcess",
  "taskUUID": "0b25ed53-f0da-4d6b-b581-d3f1c35923fa",
  "guideImageURL": "https://im.runware.ai/image/os/a01d21/ws/3/ii/3aea834d-e018-4978-bd5f-ffcba60b3bf8.jpg",
  "cost": 0.0006,
  "guideImageUUID": "3aea834d-e018-4978-bd5f-ffcba60b3bf8",
  "inputImageUUID": "f38e5058-2e24-44cb-b11b-08c2032eb511"
}

lineart-extraction

Arborist Helmet Colorway Line Guide$0.0006~4s

Try in Playground

import { createClient } from '@runware/sdk'

const client = await createClient({ apiKey: process.env.RUNWARE_API_KEY })
await client.connect()

const [result] = await client.run({
  model: 'runware:controlnet-preprocess@lineart',
  inputs: {
    image: 'https://assets.runware.ai/assets/inputs/c23b5df6-f1e8-4faf-bcc9-3bac905fff1c.jpg'
  }
})

import asyncio
import os

from runware import Runware


async def main():
    async with Runware(api_key=os.environ["RUNWARE_API_KEY"]) as client:
        results = await client.run({
            "model": "runware:controlnet-preprocess@lineart",
            "inputs": {
                "image": "https://assets.runware.ai/assets/inputs/c23b5df6-f1e8-4faf-bcc9-3bac905fff1c.jpg"
            }
        })


asyncio.run(main())

curl https://api.runware.ai/v1 \
  -H "Authorization: Bearer $RUNWARE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "taskType": "controlNetPreprocess",
      "taskUUID": "75b746c3-2853-4921-83de-a2c76f71a45e",
      "model": "runware:controlnet-preprocess@lineart",
      "inputs": {
        "image": "https://assets.runware.ai/assets/inputs/c23b5df6-f1e8-4faf-bcc9-3bac905fff1c.jpg"
      }
    }
  ]'

runware run runware:controlnet-preprocess@lineart \
  inputs.image=https://assets.runware.ai/assets/inputs/c23b5df6-f1e8-4faf-bcc9-3bac905fff1c.jpg

{
  "taskType": "controlNetPreprocess",
  "taskUUID": "75b746c3-2853-4921-83de-a2c76f71a45e",
  "model": "runware:controlnet-preprocess@lineart",
  "inputs": {
    "image": "https://assets.runware.ai/assets/inputs/c23b5df6-f1e8-4faf-bcc9-3bac905fff1c.jpg"
  }
}

Response

{
  "taskType": "imageControlNetPreProcess",
  "taskUUID": "75b746c3-2853-4921-83de-a2c76f71a45e",
  "guideImageURL": "https://im.runware.ai/image/os/a05d22/ws/3/ii/a65422cf-6c6e-43d9-9d54-af3b9a9229fb.jpg",
  "cost": 0.0006,
  "guideImageUUID": "a65422cf-6c6e-43d9-9d54-af3b9a9229fb",
  "inputImageUUID": "6a338031-f085-4e79-a2d2-b997d92527d1"
}