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FeaturedUsing ComfyUI Flux.1 for One-Click Background Replacement

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Mimic PC
11/03/2024
ComfyUI
Flux
Change image background with Comfyui Flux.1 model: 1. Setting Up the Workflow and Preparing Your Photos 2. Adjust the Portrait Size 3. Modify the Background Lighting 4. Ensure Portrait and Outfit's Consistency

In today's guide blog, we'll walk you through how to use Flux for one-click background replacement. This workflow is perfect for photo editing, color correction and image merging, offering a seamless experience to enhance your visuals.

comfyui background replacement workflow

Run This Workflow Now

  • All nodes and models are ready to go.
  • No manual setup required.
  • Error-free—just click and run!

Below is a step-by-step guide that will take you through everything from preparing the images to fine-tuning the light source, ensuring your subject blends naturally into the new background. We'll also show you how to adjust the blur for a softer,more integrated look and ensure the subjects's clothing and other details remain consistent throughout the process.


Getting Started with ComfyUI on MimicPC

To begin, it’s important to familiarize yourself with the tools available in ComfyUI. The intuitive interface makes it easy to navigate through various options, allowing you to focus on your creative vision.

For additional details on ComfyUI, check out this helpful guide: https://www.mimicpc.com/learn/how-to-start-with-comfyui-a-beginners-guide.

1. Log in to MimicPC:

Start by accessing your MimicPC account. If you're new to the platform, signing up is a simple and fast process.

mimicpc comfyui

2. Open ComfyUI:

Download ComfyUI from ''Add New App'', and ensure you are using the latest version of ComfyUI on MimicPC to access the advanced features of background replacement.

open comfyui online

After the installation is complete, we can dive into the creative process. Let’s Get Started on Background Replacement!


How to Replace Background in One-Click

Step 1: Setting Up the Workflow and Preparing Your Photos

how to replace image background in one click

Start by gathering two images: one of the portrait you want to change the background for and another that represents the new background you'd like to use. For example, you can choose a beautiful landscape or a vibrant city scene that complement you portrait perfectly.

Reference Pictures:

replace image backgroundhow to replace image background

Step 2: Adjust the Portrait Size

If the subject in your chosen portrait takes up too much space, you might want to resize it using Photoshop or any editing software. This way, you can modify the size to fit better within the desired background. Simply adjust the dimension of the portrait so that it hramonize with the new back drop, focusing on creating a balanced composition. The desired size can be adjusted in the red circle in the picture below.

change image bakground

Step 3: Modify the Background Lighting

Once the size adjustments are made, consider whether the lighting in the background needs tweaking depends on the background picture you prepare. Proper lighting ensures that the subject and background don't clash visually. To make these adjustment, you'll use the comfyui-mixlab-nodes. Simply right click on 'on/off' will enable the nodes for modifying the light source.

how to change image background

Additionally. to create a seamless blend between the portrait and the background, you can apply ImageBlur. This effect softens the edges, making it appear as if the portrait is naturally integrated into the scene. The blur_radius controls the intensity of this effect; a higher radius creates a more pronounced blur, and we recommend a setting between 2 and 5 for the best results.

how to chang image background

Step 4: Ensure Portrait and Outfit's Consistency

After adjusting the background, it's crucial to maintain the consistency of the subject's clothing and features. For this, utilize the seg/person_yolov8m-seg model to ensure that the outfit remains the same during the image generation process. This step gurantees that your final image look polished as professional.

change image background

Finally, let's take a look at the results!

how to change image background

how to change image background comfyui flux

Conclusion

By following these steps, you can effortlessly create stunning images that merge your portraits with beautiful backgrounds, opening the door to endless possibilities for both personal and creative projects. With the intuitive features of ComfyUI on MimicPC, you can enhance your creative endeavors and achieve remarkable results. Whether you aim to refine personal photos or elevate your professional work, this workflow offers a seamless and efficient solution for background replacement.

Click and apply the workflow on the right side to change your image background immediately with one-click!

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