Alt Text Generation
Automatically generate alt text for images to improve accessibility.
Overview
Section titled “Overview”Deckyard can use AI vision capabilities to generate descriptive alt text for images in your presentations. This improves accessibility for screen reader users and helps meet compliance requirements.
How It Works
Section titled “How It Works”
AI analyzes images and generates appropriate descriptions for screen readers.
The Process
Section titled “The Process”- Image is sent to the AI vision model
- AI analyzes visual content
- Descriptive text is generated
- Alt text is attached to the image
What AI Describes
Section titled “What AI Describes”- Main subject of the image
- Important visual elements
- Text visible in the image
- Context relevant to the slide
Requirements
Section titled “Requirements”Alt text generation requires:
- OpenAI API key - Only OpenAI supports vision capabilities
- Image access - Images must be accessible URLs or uploaded files
Other AI providers (Claude, Mistral) do not currently support image analysis.
Generating Alt Text
Section titled “Generating Alt Text”For Individual Images
Section titled “For Individual Images”- Select an image in your slide
- Click AI > Generate Alt Text
- Review the generated text
- Edit if needed
- Save
Bulk Generation
Section titled “Bulk Generation”Generate alt text for all images at once:
- Click AI > Generate All Alt Text
- AI processes each image
- Review generated text in the image settings
- Edit any that need adjustment
On Upload
Section titled “On Upload”Configure automatic generation:
- Go to Settings > AI
- Enable Auto-generate alt text
- New images automatically get alt text
Reviewing Alt Text
Section titled “Reviewing Alt Text”Image Settings
Section titled “Image Settings”View and edit alt text:
- Select the image
- Open image settings
- Find the Alt Text field
- Edit as needed
Quality Check
Section titled “Quality Check”Review AI-generated alt text for:
- Accuracy (does it describe the image correctly?)
- Relevance (does it help in the slide context?)
- Conciseness (is it appropriately brief?)
- Completeness (are important details included?)
Accessibility Benefits
Section titled “Accessibility Benefits”Proper alt text helps:
Screen Reader Users
Section titled “Screen Reader Users”- Understand image content without seeing it
- Navigate presentations effectively
- Get full context of your message
SEO Improvements
Section titled “SEO Improvements”- Search engines index alt text
- Improves discoverability
- Better image search results
Compliance
Section titled “Compliance”Meets requirements for:
- WCAG 2.1 accessibility guidelines
- Section 508 compliance
- ADA digital accessibility
Best Practices
Section titled “Best Practices”What Makes Good Alt Text
Section titled “What Makes Good Alt Text”Do:
- Describe the image content clearly
- Keep it concise (125 characters is ideal)
- Include relevant context
- Describe text shown in images
Don’t:
- Start with “Image of” or “Picture of”
- Include irrelevant details
- Describe decorative elements
- Leave important images without alt text
When to Edit AI Alt Text
Section titled “When to Edit AI Alt Text”Edit the generated text when:
- It misses the main point
- Context from the slide is needed
- Technical terms need clarification
- The image has specific meaning in your presentation
Decorative Images
Section titled “Decorative Images”For purely decorative images:
- Set alt text to empty (
"") - Screen readers will skip them
- Mark as decorative in image settings
Examples
Section titled “Examples”Before and After
Section titled “Before and After”AI Generated:
“A bar chart showing four colored bars of different heights”
Improved:
“Q4 revenue by region: North America $4.2M, Europe $3.1M, Asia $2.8M, Other $1.2M”
AI Generated:
“A group of people sitting around a table in an office”
Improved:
“The leadership team reviewing quarterly results in the boardroom”
Language Support
Section titled “Language Support”Alt text can be generated in your presentation’s language:
- AI generates in detected language
- Multi-language presentations get localized alt text
- Translate existing alt text with AI translation
Privacy
Section titled “Privacy”What’s Sent to AI
Section titled “What’s Sent to AI”- Image data (for analysis)
- Presentation context (optional, improves relevance)
Data Handling
Section titled “Data Handling”- Images are processed but not stored
- OpenAI’s data policies apply
- See your privacy settings
Limitations
Section titled “Limitations”Not Currently Supported
Section titled “Not Currently Supported”- Complex diagrams (AI may not capture all details)
- Charts with many data points
- Images with dense text
- Very abstract images
When Manual Alt Text is Better
Section titled “When Manual Alt Text is Better”- Charts and graphs (describe the data/trend)
- Screenshots (describe what’s shown)
- Branded images (include brand context)
- Images with specific meaning to your audience