How to Extract a Subject from an AI Image

Subject extraction lets you isolate the main subject of an AI-generated image from its background. It is a simple but powerful tool for compositing, character reuse, and building flexible creative assets.

Quick answer: To extract a subject in Melies, right-click any AI-generated image and select the extract option. Melies automatically identifies the main subject, removes the background, and creates a clean cutout with a transparent background that you can reuse in new scenes, composite into other images, or save as a reference asset.

What Subject Extraction Does

When you extract a subject, Melies uses AI to:

1. Identify the main subject - Detects the primary person, character, or object in the image
2. Remove the background - Strips away everything behind the subject
3. Create a clean cutout - Produces an image with a transparent background

The result is a clean, reusable asset with a transparent background. You can use it as a reference image to generate new images or videos featuring the same subject in completely different scenes. This works for both objects (a product, a prop, a vehicle) and people - you can turn an extracted person into a custom AI actor to maintain their likeness across your entire project.

How to Extract a Subject

Step 1: Generate or Select Your Image

Start with any AI-generated image in your project. This can be a freshly generated image or one saved in your assets. Subject extraction works best when the image has a clearly defined main subject - a person, character, or distinct object.

Step 2: Open the Context Menu

Right-click on the image to open the context menu. You will see the option to extract the subject alongside other actions like generating variations.

Step 3: Run the Extraction

Select the extract subject option. Melies will process the image and isolate your subject automatically. This usually takes just a few seconds.

Step 4: Review and Save

The extracted subject will appear with a transparent background. If the result looks clean, save it to your project assets for future use.

Use Cases

Character Isolation

Extract a character from one scene to reuse them in others. This is especially useful when combined with

- generate your actor in a well-lit scene, extract them, then use the cutout as a reference for placing them in new environments.

Compositing

Need to combine elements from multiple images? Extract subjects from different generations and composite them together. A character from one scene can be placed into an environment from another.

Reference Images

Use extracted subjects as reference images for new generations. Some models like Flux Kontext and Flux Kontext Max accept reference images and can generate new scenes featuring your extracted character or object, maintaining consistency while changing the environment entirely.

Storyboard Flexibility

When building a storyboard, you might want the same character in many different settings. Extract the character once and reuse the cutout across your project, saving credits by not regenerating the character from scratch each time.

Asset Libraries

Build a library of extracted characters, objects, and props. Over time, you create a reusable collection of elements that can be mixed and matched across multiple projects.

Tips for Clean Extractions

Use High-Contrast Images

Images where the subject clearly stands out from the background produce the cleanest extractions. If your subject blends into the background (similar colors, soft edges), try regenerating with different lighting or a simpler background first.

Single Subject Works Best

Extraction is designed for one main subject. If your image has multiple people or objects, the AI will pick the most prominent one. For multi-character scenes, extract each character from separate images.

Solid Lighting Helps

Well-lit subjects with defined edges extract more cleanly than subjects in heavy shadow or fog. If you need to extract a subject, generate the base image with clear lighting like Soft/Diffused or High-key Bright before applying dramatic lighting in later stages.

Check the Edges

After extraction, zoom in to check the edges of your subject. Hair, fur, and translucent elements are the trickiest parts. If the edges are not clean enough, try generating the original image at a higher resolution or with a higher-quality model.

What to Do Next

• Generate AI images

  

  How to Generate AI Images with Melies

  Learn how to generate AI images step by step with Melies. Choose from 16 models, write effective prompts, pick the right aspect ratio, and create stunning visuals.
  - Create images to extract subjects from
• Create AI actors

  

  AI Character Generator: Create Consistent AI Characters

  Use the Melies AI character generator to create consistent characters across scenes. Browse 148 pre-built AI actors and generate images with the same character every time.
  - Use consistent characters with extraction for maximum flexibility
• Generate image variations

  

  How to Generate AI Image Variations

  Learn how to generate AI image variations in Melies. Change camera angles, lighting, expressions, color grades, and more from a single base image.
  - Explore different styles after extracting your subject
• Create AI videos

  

  AI Image to Video: How to Turn Any Image into Video with AI

  Turn any AI image into video with Melies. Step-by-step guide to AI image to video generation with 8 models, text-to-video, motion prompts, and cinematic results.
  - Turn your extracted subject into video content

Visit the

to start creating images and extracting subjects.