NanoPPT

Generate stylized presentation images using Nano Banana (Google Gemini) image generation.

Authentication

IMPORTANT: All API requests require authentication. Get your auth token and API URL by running:

AUTH_TOKEN=$(/home/user/.local/bin/rebyte-auth)
API_URL=$(python3 -c "import json; print(json.load(open('/home/user/.rebyte.ai/auth.json'))['sandbox']['relay_url'])")

Include the token in all API requests as a Bearer token, and use $API_URL as the base for all API endpoints.

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Workflow

Article -> ASCII Framework -> Select Style -> Generate Images -> Use in PPT

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Step 1: Article to ASCII Framework

Read the article, extract core information, and create ASCII layout for each slide.

See tips/article-to-ascii-ppt.md for detailed methodology.

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Step 2: Generate Images

Use scripts/generate.py for all image generation tasks.

Text-to-Image (New slides)

python scripts/generate.py \
  --prompt "Doraemon style, presentation slide, title: Hello World" \
  --model pro \
  --aspect-ratio 16:9 \
  --size 2K \
  --output slide-01.png

Image-to-Image (Edit/Enhance existing)

python scripts/generate.py \
  --input slide-01.png \
  --prompt "Fix the text: change Helo to Hello" \
  --model pro \
  --output slide-01-fixed.png

Script Options

--prompt, -p    Text prompt or editing instructions (required)
--input, -i     Input image path (for image-to-image editing)
--output, -o    Output image path (required)
--model, -m     flash (fast, default) or pro (high quality)
--aspect-ratio  16:9, 1:1, 9:16, etc. (default: 16:9)
--size          1K, 2K, 4K (pro model only)

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API Reference

Endpoint: POST $API_URL/api/data/images/generate

Authentication: Required. Use Authorization: Bearer $AUTH_TOKEN header.

Parameter	Required	Description
prompt	Yes	Text description or editing instructions
image	No	Base64-encoded source image (for image-to-image)
imageMimeType	No	image/png, image/jpeg, or image/webp (default: image/png)
model	No	flash (fast, default) or pro (high quality)
aspectRatio	No	1:1, 16:9, 9:16, 4:3, 3:4, 21:9, etc.
imageSize	No	1K, 2K, 4K (pro model only)

Example curl:

curl -X POST "$API_URL/api/data/images/generate" \
  -H "Authorization: Bearer $AUTH_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"prompt": "Doraemon style presentation slide", "model": "flash", "aspectRatio": "16:9"}'

Response:

{
  "image": {
    "base64": "iVBORw0KGgo...",
    "mimeType": "image/png",
    "dataUrl": "data:image/png;base64,..."
  },
  "description": "AI generated description"
}

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Style Examples

See examples/ directory for 18+ style samples:

• Anime: Doraemon, Naruto, Ghibli, One Piece
• Trendy: Cyberpunk, Vaporwave, Pixel Art
• Artistic: Ink Wash, Van Gogh, Art Deco

See tips/ppt-image-generation.md for prompt keywords per style.

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Delivering Output

After generating slide images, upload them to the Artifact Store so the user can access them.

Tips

Topic	File
Article to ASCII methodology	tips/article-to-ascii-ppt.md
Style prompt keywords	tips/ppt-image-generation.md
Text correction	tips/text-correction.md
4K upscale	tips/4k-upscale.md