都市街头黑白肖像，选择性黄色点缀

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"
}
}
}