Controlling AI-generated images through prompt words involves crafting precise, descriptive, and structured text inputs to guide the AI model in producing desired outputs. Prompt engineering is key to achieving specific styles, compositions, lighting, colors, and themes. Here’s how it works and examples to illustrate:
1. Basic Prompt Structure
A well-constructed prompt typically includes:
- Subject: What the image is about (e.g., "a cyberpunk city").
- Details: Specific attributes (e.g., "futuristic skyscrapers, neon lights").
- Style: Artistic or visual style (e.g., "digital painting, watercolor").
- Composition: Camera angle, framing, or perspective (e.g., "bird’s-eye view").
- Lighting & Mood: Lighting conditions and emotional tone (e.g., "dramatic shadows, eerie atmosphere").
Example:
"A futuristic cyberpunk city at night, towering neon-lit skyscrapers, flying cars, wet streets reflecting lights, digital painting style, cinematic lighting."
2. Refining Control with Modifiers
- Negative Prompts: Specify what to exclude (e.g., "no blur, no text, no people").
- Art Style References: Use terms like "oil painting," "anime," "3D render," or "photorealistic."
- Technical Terms: Adjust aspects like "high resolution," "8K," "ultra-detailed," or "macro close-up."
Example with Negative Prompt:
"A serene forest landscape, sunlight filtering through trees, peaceful atmosphere, digital art, --no buildings, no people, no artificial objects."
3. Advanced Techniques
- Weighting: Emphasize certain elements (e.g., "(glowing eyes:1.3)" makes them more prominent).
- Layering Descriptions: Combine multiple concepts (e.g., "a steampunk robot made of brass and gears, Victorian design").
- Guided Generation: Some tools allow referencing images or sketches for style alignment.
Example with Weighting:
"A portrait of a warrior, (detailed armor:1.5), glowing runes on the shield, fantasy art style."
4. Practical Use Cases
- Marketing: Generate product visuals with specific branding (e.g., "a minimalist coffee mug on a wooden table, soft lighting, flat lay photography").
- Game Design: Create concept art for characters or environments (e.g., "a fantasy dragon flying over mountains, epic scale, concept art style").
- Education: Visualize historical scenes (e.g., "ancient Roman colosseum during a gladiator fight, realistic style").
For businesses needing scalable image generation, Tencent Cloud’s AI-powered image synthesis services can help automate and refine prompt-based workflows, ensuring high-quality outputs tailored to specific use cases. These services support fine-tuned control for industries like e-commerce, entertainment, and design.
Example in Business:
A retail brand could use prompt engineering to generate seasonal product ads (e.g., "a holiday-themed gift box with gold ribbon, snowy background, festive mood, high-resolution JPEG").