ヴィンテージ風イラスト都市旅行ポスター

{ "input": { "city_name": "{{CITY NAME}}" }, "generation": { "type": "premium_illustrated_travel_poster", "aspect_ratio": "3:4", "orientation": "portrait", "resolution": "high", "reference_mode": "use_uploaded_images_for_style_reference_only", "city_adaptation": "fully_automatic" }, "creative_direction": { "objective": "美しく構成された、目的地固有のイラスト調トラベルポスターを作成する。洗練された現代的なベクターアートワークを用いた、プレミアムなヴィンテージ・ヨーロッパ旅行版画のような仕上がりを目指す。生成されるすべての画像は、指定された都市の真正な視覚的ポストカードのように感じられるものでなければならない。", "art_style": { "primary": "refined_flat_vector_illustration", "secondary": "mid_century_travel_poster", "influences": [ "classic European tourism posters", "Japanese illustrated travel prints", "modern editorial vector artwork", "minimalist architectural illustration" ], "rendering": "clean geometric shapes, precise architectural outlines, layered silhouettes, controlled shading, subtle tonal gradients, carefully simplified details", "texture": "smooth matte printed-paper appearance with extremely subtle print texture", "realism_level": "stylized illustration with recognizable architectural accuracy", "avoid": [ "photorealism", "3D rendering", "watercolor effects", "rough sketching", "childish cartoon styling", "excessive gradients", "plastic-looking surfaces", "generic AI artwork" ] }, "destination_intelligence": { "instruction": "実際の都市、その国、および最も認識しやすい視覚的ランドマークを特定する。本物の建築、地域の風景、交通機関、公共空間、文化的要素を注意深く選び組み合わせたものを中心に構図を構築する。", "landmarks": "指定された都市に関連する2〜4の認識可能なランドマークまたは建築的特徴を選定する。", "architecture": "その都市特有の建築様式、屋根のライン、ファサード、塔、記念碑、都市構造を再現する。", "natural_environment": "該当する場合、地域に適した山、川、湖、海岸線、庭園、樹木、その他の景観要素を含める。", "transportation": "適切な場合に限り、地域で認識可能な列車、路面電車、バス、ボート、自転車、その他の交通要素を追加する。", "cultural_details": "街灯、伝統的な店舗、橋、看板、地域の植生など、繊細で本物の地域的ディテールを含める。", "accuracy_rule": "ランドマークを捏造したり、無関係な都市を組み合わせたりしてはならない。認識可能なすべての場所と文化的ディテールは、要求された目的地に対応していなければならない。", "fallback": "都市に国際的に認識可能なランドマークが限られている場合、その実際の建築、都市の性格、地域の景観を用いて真正な構図を作成する。" }, "composition": { "layout": "large illustrated cityscape in the upper portion, destination typography in a separate lower section", "main_illustration": { "coverage": "approximately 78 to 83 percent of the canvas height", "framing": "a carefully composed, almost rectangular scenic illustration with clean edges", "perspective": "slightly elevated or street-level architectural perspective chosen to best showcase the destination", "depth_layers": [ "foreground with flowers, trees, benches, railings, steps, pedestrians, or waterfront details", "middle ground with streets, bridges, public spaces, transport, and prominent architecture", "background with the city's skyline, secondary landmarks, and natural landscape" ], "visual_hierarchy": "one dominant landmark supported by complementary architectural elements", "spacing": "balanced, intentional, and visually rich without overcrowding", "human_figures": "small, elegantly simplified pedestrians used sparingly to establish scale", "sky": "clean pale sky with a few minimal stylized clouds or birds when appropriate" }, "foreground_details": { "instruction": "Select destination-appropriate details that frame the scene naturally without obscuring its important landmarks.", "density": "moderate", "rule": "Avoid forcing flowers, boats, trees, or other elements into cities where they would look geographically or compositionally unnatural." }, "background": { "color": "warm white or very pale ivory", "style": "minimal, uncluttered, print-ready", "negative_space": "generous space surrounding the illustration and destination typography" } }, "color_palette": { "primary": [ "deep navy blue", "cobalt blue", "sky blue", "warm ivory", "soft cream" ], "secondary": [ "muted forest green", "sage green", "warm architectural beige", "terracotta", "soft grey" ], "adaptation": "Adjust accent colors to complement the city's architecture, national character, and natural surroundings.", "contrast": "clear and harmonious with strong separation between architectural layers", "saturation": "moderate, elegant, and print-friendly", "lighting": "bright, soft daylight with minimal hard shadows" }, "typography": { "placement": "centered beneath the illustration", "city_name": { "text": "{{CITY NAME IN UPPERCASE}}", "font_style": "large, elegant, geometric sans-serif", "weight": "regular to medium", "letter_spacing": "very wide", "alignment": "center", "color": "deep navy blue", "importance": "primary visual anchor of the lower section" }, "country_name": { "text": "Automatically identify the correct country and display its name in uppercase", "font_style": "small, clean sans-serif", "letter_spacing": "wide", "alignment": "center", "color": "muted navy or a restrained destination-appropriate accent", "position": "directly below the city name" }, "decorative_elements": { "horizontal_lines": "thin symmetrical horizontal lines on either side of the country name when visually appropriate"