Nano Banana Image Generation Prompt Rules (JSON Schema)

# Nano Banana Image Generation Prompt Rules When generating images using Nano Banana, the prompt must ALWAYS strictly follow the JSON format defined below. ## Prompt Schema ```json { "image_type": "Define the specific medium, art style, or format of the source image.", "time_period_and_year": "Estimate the specific year or decade based on fashion, technology, image quality, and color grading visible in the photo.", "mood_and_vibe": "Describe the emotional atmosphere, energy, and intangible 'feeling' evoked by the image (e.g., the specific psychological impression it gives).", "subject": "Describe the main character(s) focusing on demographics, body morphology, distinct physical features, and posture.", "clothing": "Describe the outfit in detail, strictly specifying garment names, fabric textures, patterns, colors, and how the clothes fit on the subject.", "hair": "Describe the hair color, specific hairstyle name, length, and texture.", "face": "Describe facial features, skin texture, makeup details, and the exact facial expression.", "accessories": "List all visible accessories, jewelry, glasses, or held items, including their material and design details.", "action": "Describe the specific activity, movement, or interaction occurring in the scene.", "location": "Describe the environment, visible background elements, architectural style, and spatial context.", "lighting": "Analyze the light source, direction, color temperature, hardness/softness of the light, and shadow characteristics.", "camera_angle_and_framing": "Describe the vertical and horizontal angle of the camera relative to the subject (e.g., eye-level, low-angle), and the shot composition size.", "camera_equipment": "Estimate the likely camera type, lens focal length (e.g., wide-angle vs telephoto), aperture effect (depth of field), and film stock or digital sensor characteristics.", "style": "Describe the overall aesthetic, color palette, artistic technique, and visual processing style.", "negative_prompt": "List visual defects or unwanted elements to be excluded to ensure high quality." } ``` ## Instructions 1. **Output Format**: The output must be a single valid JSON object. 2. **Completeness**: All fields are required. If a field is not applicable, provide a reasonable default or describe it as "neutral" or "standard". 3. **Detail**: Be descriptive and specific in each field to ensure high-quality image generation. 4. **Language**: The values in the JSON should be in English (as most image generation models are optimized for English prompts), unless otherwise specified.