都市街头黑白肖像，选择性黄色点缀

json Nano Banana Pro Prompt: { "image_request": { "goal": "Create a stylized urban street portrait with selective color", "meta": { "image_type": "Hyperrealistic Portrait", "quality": "8K", "color_mode": "Black and White with Selective Color (Yellow)", "style_mode": "mixed_media_street", "aspect_ratio": "4:5", "resolution": "1080x1350px" }, "creative_style": "Urban Street Photography with Selective Color Pop, mixing realistic portraiture with illustrative graphic elements, joyful energetic vibe, high contrast monochrome background with vibrant yellow accents", "overall_theme": "joyful urban energy", "mood_vibe": "wild chaotic energetic spontaneous", "style_keywords": [ "selective color", "black and white", "color splash", "urban street", "music", "joyful", "elderly cool", "graphic overlay", "yellow", "city life" ], "subject": { "count": "1", "type": "female", "identity": "cool elderly woman with messy white hair", "identity_preservation": { "description": "Preserve the joyful expression and the specific age characteristics", "notes": "Stylish grandmother figure" }, "age_appearance": "elderly (70s-80s)", "skin": "textured, wrinkled, authentic age details", "makeup": { "lips": "natural", "eyes": "hidden by sunglasses", "general": "natural" }, "facial_features": { "expression": "laughing or singing with pure joy", "eyes": { "gaze": "looking forward/upward (hidden)", "intensity": "joyful" }, "lips": { "gesture": "mouth open in laughter or song" } }, "hair": { "length": "short/medium", "texture": "messy/wavy", "style": "white hair pulled back in a loose bun, wind-blown", "lighting_interaction": { "light": "soft diffuse city light", "shadow_play": "soft shadows" } }, "clothing": { "top": "dark quilted jacket", "bottom": "not visible", "full_description": "casual winter city attire, dark quilted jacket with a scarf", "accessories": "bright yellow thick-rimmed sunglasses, large bright yellow over-ear headphones with a yellow cord" }, "props": { "bouquet": "none", "wine_glass": "none", "other": "yellow graphic squiggly line looping around subject" } }, "pose_action": { "description": "Walking through a busy city street, enjoying music, laughing or singing along.", "overall_pose": "standing/walking candid", "head_turn": "slight turn to side", "gaze": "forward", "body_position": "facing forward/side", "hands": "arms at sides (mostly out of frame)", "movement": "dynamic candid walking" }, "multiple_frames_expressions": [], "environment": { "setting": "Busy metropolitan street (New York City/Times Square style)", "location": "outdoor city crosswalk", "weather": "overcast/city haze", "time_of_day": "daytime", "atmosphere": "bustling urban energy" }, "background": { "color": "grayscale", "effect": "blurred background showing skyscrapers, billboards, and crowds in black and white" }, "lighting": { "type": "natural city daylight", "position": "overhead diffused", "direction": "omnidirectional", "intensity": "moderate", "focus": "subject", "falloff": "natural", "light_quality": "soft diffused", "source": "sky/city reflections", "tone": "monochrome", "mood": "energetic", "subject_lighting": "even illumination", "environment_lighting": "diffused daylight", "color_temperature": "neutral (converted to B&W)", "contrast_shadow": "medium contrast", "shadow_quality": "soft", "imperfections": [ "none" ] }, "camera": { "sensor_format": "Full Frame Digital", "lens": "35mm or 50mm", "position_angle": "eye-level", "distance": "medium close-up", "framing": "portrait", "depth_of_field": "shallow to separate subject from busy background", "composition": { "framing": "center weighted", "depth": "subject sharp, background blurred", "emphasis": "the yellow accessories popping against the B&W scene", "angle": "eye-level" } }, "photobooth_collage_specific": { "frame_count_per_strip": "1", "total_prints": "1", "layout": "single frame", "border": "none", "tonality_texture": "smooth digital with graphic overlay", "highlight_behavior": "matte B&W with vibrant yellow gloss" }, "color_grading": { "palette": "Black, White, Gray, Bright Yellow", "lut": "Selective Color Yellow", "mood": "artistic and fun" }, "post_processing": { "sharpening": "standard", "final_touch": "desaturate entire image except for headphones, sunglasses, and graphic line" }, "negative": { "style": "full color, low contrast, gloomy, sad", "content": "young person, no headphones, no sunglasses, empty street", "artifacts": "color bleeding, bad masking" }, "additional_controls": { "focus_emphasis": "the yellow elements and the subject\'s expression", "grounding": "walking on crosswalk", "special_notes": "Include a thick yellow squiggly graphic line winding through the air around the subject to represent music vibes.", "vibe": "cool nostalgic fan collection", "final_output_goal": "looks like a creative advertisement or artistic street photography project" } } }