openclaw-home-pc/skills/image-edit/outpainting.md

Outpainting

Extend an image beyond its original borders.

How It Works

1. Place original image on larger canvas
2. Mask the empty areas (white = generate here)
3. Describe what should appear in extended areas
4. AI generates content matching style and context

Tools

DALL-E 2 (OpenAI)

from openai import OpenAI
from PIL import Image
import io

client = OpenAI()

# Create extended canvas
original = Image.open("photo.png")
extended = Image.new("RGBA", (1024, 1024), (0, 0, 0, 0))
extended.paste(original, (256, 256))  # Center original

# Create mask (transparent = edit)
mask = Image.new("RGBA", (1024, 1024), (255, 255, 255, 255))
mask.paste(Image.new("RGBA", original.size, (0, 0, 0, 0)), (256, 256))

response = client.images.edit(
    model="dall-e-2",
    image=to_bytes(extended),
    mask=to_bytes(mask),
    prompt="Continue the landscape with mountains in the distance"
)

Stable Diffusion Outpaint

from diffusers import StableDiffusionInpaintPipeline

# Same as inpainting, but with extended canvas
# Original image centered, mask covers new areas

pipe = StableDiffusionInpaintPipeline.from_pretrained(
    "runwayml/stable-diffusion-inpainting",
    torch_dtype=torch.float16
)

result = pipe(
    prompt="expansive landscape, same style",
    image=extended_image,
    mask_image=outpaint_mask,
    num_inference_steps=50
).images[0]

Photoshop Generative Fill

1. Select > All
2. Image > Canvas Size (increase dimensions)
3. Select empty areas with Magic Wand
4. Edit > Generative Fill
5. Enter prompt or leave blank

Aspect Ratio Expansion

Portrait to Landscape:

• Extend left and right
• Prompt for environmental context

Landscape to Portrait:

• Extend top and bottom
• Consider sky above, ground below

Square to Cinematic (16:9):

• Add 280px each side for 1080p
• Describe scene continuation

Best Practices

• Overlap slightly — let AI see edge context
• Match lighting direction — describe consistent light
• Extend in steps — don't 4x the canvas at once
• Describe style — "same artistic style", "photorealistic"

Common Issues

• Style mismatch — add style keywords to prompt
• Repeated elements — AI may duplicate objects
• Perspective errors — complex scenes may warp
• Seam lines — blend with photo editor after