Stable Image - Image Extender

Extend and expand image borders using Stability AI's advanced outpainting technology. Intelligently generate new content beyond the original image boundaries while maintaining visual coherence and style consistency.

Endpoint

POSThttps://api.1min.ai/api/features

Request Headers

Field	Value
API-KEY	`<api-key>`
Content-Type	`application/json`

Parameters

Parameter	Type	Required	Description
`type`	string	Yes	Feature type identifier. Must be `IMAGE_EXTENDER`
`model`	string	Yes	AI model identifier. Must be `stable-image`
`promptObject`	object	Yes	Configuration object containing all extension parameters

Prompt Object Parameters

Parameter	Type	Required	Description	Default
`imageUrl`	string	Yes	Path to the image to be extended	-
`output_format`	string	No	Output format for the extended image	`png`
`left`	number	No	Pixels to extend on the left side (0-2000)	0
`right`	number	No	Pixels to extend on the right side (0-2000)	0
`up`	number	No	Pixels to extend on the top side (0-2000)	0
`down`	number	No	Pixels to extend on the bottom side (0-2000)	0

Extension Parameters

Parameter	Range	Description
`left`	0-2000	Number of pixels to extend the image to the left
`right`	0-2000	Number of pixels to extend the image to the right
`up`	0-2000	Number of pixels to extend the image upward
`down`	0-2000	Number of pixels to extend the image downward

Supported Output Formats

Format	Description	Best For
`png`	High quality, lossless compression	Detailed images, graphics with transparency
`jpeg`	Smaller file size, slight compression	Photographs, web images
`webp`	Modern format, excellent compression	Web applications, modern browsers

Code Examples

cURL
JavaScript
Python

curl --location 'https://api.1min.ai/api/features' \
--header 'API-KEY: <api-key>' \
--header 'Content-Type: application/json' \
--data '{
"type": "IMAGE_EXTENDER",
"model": "stable-image",
"promptObject": {
  "imageUrl": "development/images/2025_02_16_14_16_21_627_images.jpeg",
  "output_format": "png",
  "left": 200,
  "right": 200,
  "up": 150,
  "down": 150
}
}'

fetch('https://api.1min.ai/api/features', {
method: 'POST',
headers: {
  'Content-Type': 'application/json',
  'API-KEY': 'YOUR_API_KEY'
},
body: JSON.stringify({
  type: 'IMAGE_EXTENDER',
  model: 'stable-image',
  promptObject: {
    imageUrl: 'development/images/2025_02_16_14_16_21_627_images.jpeg',
    output_format: 'png',
    left: 200,
    right: 200,
    up: 150,
    down: 150
  }
})
})

import requests

url = "https://api.1min.ai/api/features"
headers = {
"Content-Type": "application/json",
"API-KEY": "YOUR_API_KEY"
}

data = {
"type": "IMAGE_EXTENDER",
"model": "stable-image",
"promptObject": {
  "imageUrl": "development/images/2025_02_16_14_16_21_627_images.jpeg",
  "output_format": "png",
  "left": 200,
  "right": 200,
  "up": 150,
  "down": 150
}
}

response = requests.post(url, headers=headers, json=data)

Interactive Playground

API Playground

https://api.1min.ai/api/features

AI Model *

Image URL *

Path to the image file to be extended

Output Format

Format of the extended image

Extend Left

Pixels to extend on the left side (0-2000)

Extend Right

Pixels to extend on the right side (0-2000)

Extend Up

Pixels to extend on the top side (0-2000)

Extend Down

Pixels to extend on the bottom side (0-2000)

Generated cURL Command:

curl -X POST "https://api.1min.ai/api/features" \
  -H "API-KEY: <your-api-key>" \
  -H "Content-Type: application/json" \
  -d '{
  "type": "IMAGE_EXTENDER",
  "model": "stable-image",
  "promptObject": {
    "imageUrl": "development/images/2025_02_16_14_16_21_627_images.jpeg",
    "output_format": "png",
    "left": 200,
    "right": 200,
    "up": 150,
    "down": 150
  }
}'

Response Format

{
"aiRecord": {
  "uuid": "e1x2t3e4-n5d6-7890-abcd-ef1234567890",
  "userId": "user-12345",
  "teamId": "team-67890",
  "teamUser": {
    "teamId": "team-67890",
    "userId": "user-12345",
    "userName": "John Doe",
    "userAvatar": "https://example.com/avatar.jpg",
    "status": "ACTIVE",
    "role": "ADMIN",
    "creditLimit": 100000000,
    "usedCredit": 25000,
    "createdAt": "2025-01-01T00:00:00.000Z",
    "createdBy": "SYSTEM",
    "updatedAt": "2025-01-15T13:00:00.000Z",
    "updatedBy": "SYSTEM"
  },
  "model": "stable-image",
  "type": "IMAGE_EXTENDER",
  "metadata": null,
  "rating": null,
  "feedback": null,
  "conversationId": null,
  "status": "SUCCESS",
  "createdAt": "2025-01-15T13:00:00.000Z",
  "aiRecordDetail": {
    "promptObject": {
      "imageUrl": "development/images/2025_02_16_14_16_21_627_images.jpeg",
      "output_format": "png",
      "left": 200,
      "right": 200,
      "up": 150,
      "down": 150
    },
    "resultObject": [
      "development/images/2025_01_15_13_00_30_001_extended_image.png"
    ],
    "responseObject": {}
  },
  "additionalData": null,
  "temporaryUrl": "https://s3.us-east-1.amazonaws.com/asset.1min.ai/development/images/2025_01_15_13_00_30_001_extended_image.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=EXAMPLE_CREDENTIAL&X-Amz-Date=20250115T130000Z&X-Amz-Expires=604800&X-Amz-Signature=example_signature&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject"
}
}

Use Cases

Creative & Artistic Applications

Panorama Creation: Extend landscapes and scenic views for panoramic effects
Artwork Expansion: Enlarge canvas space for digital artworks and illustrations
Background Extension: Add more background context to portraits and subjects
Scene Completion: Fill in cropped or incomplete scenes with contextual content
Artistic Exploration: Experiment with different compositions and framing

Commercial & Marketing

Banner Creation: Extend images to fit various banner and header dimensions
Social Media Adaptation: Resize images for different platform requirements
Print Layout: Expand images to fill larger print formats and layouts
Product Photography: Add background space around products for catalogs
Website Design: Create full-width background images from smaller sources

Professional Photography

Composition Adjustment: Fix tight crops by adding breathing room
Format Conversion: Convert between aspect ratios while maintaining subject
Background Enhancement: Add environmental context to studio shots
Architectural Photography: Complete building exteriors and interior spaces
Event Photography: Expand group shots to include more participants or venue

Technical & Restoration

Historical Photo Restoration: Reconstruct damaged or cropped historical images
Scan Enhancement: Complete partially scanned documents or photos
Crop Recovery: Restore accidentally over-cropped images
Archive Preservation: Enhance archival materials with missing borders
Documentation: Complete technical drawings and diagrams

Tips for Best Results

Input Image Quality: Use high-quality source images for optimal results
- Higher resolution inputs produce better extended content
- Clear, well-lit images extend more successfully than dark or blurry ones
Extension Planning: Consider the intended use before setting extension values
- Web banners: Focus on horizontal extension (left/right)
- Social media: Consider platform-specific aspect ratios
- Print materials: Plan for standard print dimensions
Content Considerations: AI performs better with certain image types
- Natural scenes: Landscapes, skies, and outdoor environments extend excellently
- Architectural: Buildings and structures with clear patterns work well
- Portraits: Consider background complexity when extending around subjects
Directional Balance: Think about visual weight and composition
- Extend toward less complex areas for more natural results
- Consider lighting direction when extending backgrounds
- Maintain compositional balance with symmetric extensions
Format Selection: Choose output format based on final use
- PNG: Best for images requiring transparency or maximum quality
- JPEG: Ideal for photographs and web use with smaller file sizes
- WebP: Modern format with excellent compression for digital applications

Limitations & Considerations

Content Limitations

Complex Subjects: Highly detailed or intricate subjects may be challenging to extend naturally
Text and Graphics: Images containing text or geometric patterns may not extend seamlessly
Faces and People: Human subjects require careful consideration of extension directions
Artistic Style: Some artistic styles may be more difficult to replicate in extensions

Technical Constraints

Maximum Extension: 2000 pixels per direction limit
File Size: 50MB maximum input file size
Processing Time: Larger extensions require longer processing times
Internet Dependency: Stable internet connection required for processing

Notes

Stable Image Extender uses advanced AI algorithms to understand image context and generate coherent extensions
Results may vary based on image complexity, content type, and extension parameters
The model excels at natural scenes, architecture, and structured backgrounds
Processing times scale with total extension area (sum of all direction extensions)
For best results, ensure source images have clear, identifiable patterns or structures that can be logically continued

Endpoint​

Request Headers​

Parameters​

Prompt Object Parameters​

Extension Parameters​

Supported Output Formats​

Code Examples​

Interactive Playground​

API Playground

Generated cURL Command:

Response Format​

Use Cases​

Creative & Artistic Applications​

Commercial & Marketing​

Professional Photography​

Technical & Restoration​

Tips for Best Results​

Limitations & Considerations​

Content Limitations​

Technical Constraints​

Notes​