Image Generator | EXO-BRAND

Quick Start

Install Dependencies

pip install google-genai pillow

Set API Key

export GEMINI_API_KEY="your-api-key"

Run Generator

python scripts/generate-logos.py

Available Models

gemini-2.0-flash-exp

Nano Banana — Fast image generation model. Best for quick iterations and exploration. Uses response_modalities=["IMAGE", "TEXT"] config.

Cost: ~$0.039 per image (1290 output tokens)
Resolution: 1024x1024 default
Best for: Rapid prototyping, exploring concepts

gemini-3-pro-image-preview

Nano Banana Pro — Higher quality model with better text rendering. Uses advanced reasoning for complex instructions.

Resolution: Up to 4K output
Best for: Final production assets, text-heavy logos

Prompt Library

Name	Type	Description
industrial_minimal	Wordmark	Clean geometric letterforms, DIN/Eurostile inspired typography
blueprint_grid	Icon + Text	Abstract "E" from technical grid pattern, CAD aesthetic
stacked_plans	Icon + Text	Three cascading document layers representing blueprints
abstract_e_mark	Icon + Text	Horizontal bars forming "E" with cyan accents
precision_crosshair	Icon + Text	CAD crosshair with corner brackets, measurement aesthetic
photography_badge	3D Render	Photorealistic brushed steel badge, product photography
monogram_icon	App Icon	Bold "E" in rounded square, favicon/app icon format
teko_wordmark	Wordmark	Condensed typography with tagline

Script Usage

                    bash
                    Batch Generation
                
# Generate all 8 logo concepts
GEMINI_API_KEY="your-key" python scripts/generate-logos.py

# Output saved to: assets/logos/generated/

                    bash
                    Interactive Mode
                
# Run with menu for single prompts
GEMINI_API_KEY="your-key" python scripts/generate-logos-interactive.py

# Select prompt by number, choose model (fast/pro)

Prompt Engineering Tips

High-Specification Prompts

Nano Banana responds well to detailed, specific prompts. Include:

• Company context: B2B SaaS, construction industry, AI-powered
• Style direction: Industrial minimalist, vector logo, flat design
• Color specification: Hex codes (#0f172a, #0ea5e9)
• Typography hints: DIN, Eurostile, Bank Gothic style
• Quality markers: Vector-quality, high resolution, crisp edges
• Background: Always specify (pure white, transparent, etc.)

                    text
                    Example High-Spec Prompt
                

Professional corporate logo for "EXOPLANS", a B2B SaaS company
specializing in AI-powered construction blueprint analysis.

Industrial minimalist style, clean geometric letterforms inspired
by DIN engineering fonts and Eurostile typography.

Color palette: Dark slate primary (#0f172a), cyan accent (#0ea5e9).
Style: Vector logo, flat design, high contrast.
Background: Pure white.
Quality: High resolution, suitable for enterprise software branding.
Typography: Bold condensed sans-serif, all capitals "EXOPLANS".
                

File Structure

                    tree
                    Project Layout
                

exo-brand/
├── index.html              # Main brand showcase
├── fonts.html              # Font research
├── prototypes.html         # SVG prototypes
├── generator.html          # This page
├── ai-logos.html           # AI logo gallery
├── assets/
│   └── logos/
│       ├── ai-generated/   # Nano Banana outputs
│       └── svg/            # Vector exports
├── scripts/
│   ├── generate-logos.py   # Batch generator
│   └── prompts.py          # Prompt library
└── docs/
    └── README.md           # Documentation
                

LOGO GENERATOR