Hero Images
Generate and OCR-validate blog hero images using Pollinations.ai nanobanana pixel art model.
The Character
Steampunk techno wizard: grey goatee, dark hair, rectangular rim-less glasses. Action matches blog post content.
Quick Reference
| Task | Command |
|---|---|
| Generate | curl -s "https://gen.pollinations.ai/image/steampunk%20pixelart%20wizard%20grey%20goatee%20glasses%20<<ACTION>>?model=nanobanana&width=1024&height=512&nologo=true&seed=<<SEED>>&image=https://mcj-coder.github.io/_astro/martin-jarvis.DLkCWo3V.jpg" -o "src/assets/blog/hero-images/[SLUG].jpg" |
| Validate | Read unique file → OCR with mcp__4_5v_mcp__analyze_image → Check spelling |
| Regenerate | Change seed, use unique filename, re-OCR |
Known Hallucinations (use synonyms)
| Problem Term | Appears As | Use Instead |
|---|---|---|
| sitemap | simemap | "xml url list", "site links" |
| troubleshooting | grouskboning | "diagnosing", "fixing" |
| PRIVILEGES | PRIVILIGES | "permissions", "access rights" |
| HTTPS | HTPS | "SSL", "secure web" |
OCR Validation Workflow
Copy and track:
code
- [ ] Generate ONE seed with unique filename (append seed) - [ ] Upload unique file to CDN via Read tool - [ ] OCR with mcp__4_5v_mcp__analyze_image - [ ] Validate text is appropriate to blog content (not exact match) - [ ] If typo: regenerate with NEW single seed, repeat from step 1 - [ ] Copy valid image to final filename - [ ] Delete temporary unique files
Critical: Single Seed Generation
Only generate ONE seed at a time. Parallel generation:
- •Wastes API credits when you find a good image on the first try
- •May trigger rate limiting
Generate → OCR validate → if wrong, THEN try next seed.
Critical: CDN Cache Bypass
The Read tool's CDN caches by filename. Same filename = cached image = stale OCR results.
Always use unique filenames during validation:
bash
# Use seed as unique identifier
curl -s "..." -o "src/assets/blog/hero-images/[SLUG]_${SEED}.jpg"
# Read the _${SEED} file for fresh CDN upload
# OCR validates → then cp to original filename
Example
bash
# Generate with seed and reference image
curl -s "https://gen.pollinations.ai/image/steampunk%20pixelart%20wizard%20grey%20goatee%20glasses%20holding%20golden%20key?model=nanobanana&width=1024&height=512&nologo=true&seed=1234&image=https://mcj-coder.github.io/_astro/martin-jarvis.DLkCWo3V.jpg" \
--header "Authorization: Bearer ${POLLINATIONS_API_KEY}" \
-o "src/assets/blog/hero-images/my-post_1234.jpg"
# Read file → get CDN URL → OCR → verify text → copy to my-post.jpg