gh-jezweb-claude-skills-skills-openai-api/references/images-guide.md

Images Guide (DALL-E 3 & GPT-Image-1)

Last Updated: 2025-10-25

Best practices for image generation and editing with OpenAI's Images API.

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DALL-E 3 Generation

Size Selection

Size	Use Case
1024x1024	Profile pictures, icons, square posts
1024x1536	Portrait photos, vertical ads
1536x1024	Landscape photos, banners
1024x1792	Tall portraits, mobile wallpapers
1792x1024	Wide banners, desktop wallpapers

Quality Settings

standard: Normal quality, faster, cheaper

• Use for: Prototyping, high-volume generation, quick iterations

hd: High definition, finer details, more expensive

• Use for: Final production images, marketing materials, print

Style Options

vivid: Hyper-real, dramatic, high-contrast

• Use for: Marketing, advertising, eye-catching visuals

natural: More realistic, less dramatic

• Use for: Product photos, realistic scenes, professional content

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Prompting Best Practices

Be Specific

❌ "A cat"
✅ "A white siamese cat with striking blue eyes, sitting on a wooden table, golden hour lighting, professional photography"

Include Art Style

✅ "Oil painting of a sunset in the style of Claude Monet"
✅ "3D render of a futuristic city, Pixar animation style"
✅ "Professional product photo with studio lighting"

Specify Lighting

- "Golden hour lighting"
- "Soft studio lighting from the left"
- "Dramatic shadows"
- "Bright natural daylight"

Composition Details

- "Shallow depth of field"
- "Wide angle lens"
- "Centered composition"
- "Rule of thirds"

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GPT-Image-1 Editing

Input Fidelity

low: More creative freedom

• Use for: Major transformations, style changes

medium: Balance (default)

• Use for: Most editing tasks

high: Stay close to original

• Use for: Subtle edits, preserving details

Common Editing Tasks

1. Background Removal

formData.append('prompt', 'Remove the background, keep only the product');
formData.append('format', 'png');
formData.append('background', 'transparent');

2. Color Correction

formData.append('prompt', 'Increase brightness and saturation, make colors more vibrant');

3. Object Removal

formData.append('prompt', 'Remove the person from the background');

4. Compositing

formData.append('image', mainImage);
formData.append('image_2', logoImage);
formData.append('prompt', 'Add the logo to the product, as if stamped on the surface');

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Format Selection

Format	Transparency	Compression	Best For
PNG	Yes	Lossless	Logos, transparency needed
JPEG	No	Lossy	Photos, smaller file size
WebP	Yes	Lossy	Web, best compression

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Cost Optimization

1. Use standard quality unless HD is critical
2. Generate smaller sizes when possible
3. Cache generated images
4. Use natural style for most cases (vivid costs more)
5. Batch requests with delays to avoid rate limits

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Common Issues

Prompt Revision

DALL-E 3 may revise prompts for safety/quality. Check revised_prompt in response.

URL Expiration

Image URLs expire in 1 hour. Download and save if needed long-term.

Non-Deterministic

Same prompt = different images. Cache results if consistency needed.

Rate Limits

DALL-E has separate IPM (Images Per Minute) limits. Monitor and implement delays.

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See Also: Official Images Guide (https://platform.openai.com/docs/guides/images)