店舗と料理写真から洗練されたAI飲食店ポスターを作る方法

飲食店ポスターで最も大切なのは、来店した客が写真と同じ料理と空間に出会えることです。AIが器、量、食材、店構えを変えると、美しい画像でも誤った期待を生みます。

Google ビジネス プロフィールは、鮮明で明るく現実を表す写真を推奨し、大幅な加工や過度なフィルター・AIを避けるよう案内しています。本ガイドでは実際の店舗と料理写真を参照として固定し、AIは露出、背景整理、光、余白、構図だけを改善します。店名、価格、営業時間、住所、期間、CTAはCanva、Adobe Express、Figmaなどで編集可能な文字として追加します。

制作フロー

例では実在ブランドではなく、架空の街のレストランとスパイシーなグレーズチキン丼を使います。実制作では店舗写真、料理写真、ロゴ、フォントの権利を確認してください。

カバー画像の制作プロンプト

Use case: ads-marketing
Asset type: 3:2 landscape blog cover and restaurant promotional-poster key visual
Primary request: Create a polished editorial advertising composition for an original contemporary neighborhood restaurant, establishing a consistent restaurant and signature dish for later reference images.
Scene/backdrop: warm evening view inside a refined small restaurant with walnut wood, cream plaster walls, deep forest-green upholstery, handmade ceramic tableware, one round brushed-brass pendant lamp, and a softly visible storefront window in the distance. No existing brand or real location.
Subject: a signature spicy glazed grilled chicken rice bowl in a distinctive wide off-white handmade ceramic bowl with a thin forest-green rim; glossy mahogany-red chicken pieces over short-grain rice, charred scallions, sesame seeds, three pale-yellow pickled radish slices, and a small copper sauce cup. The exact bowl, plating, portion, garnishes, and restaurant materials must be clear and memorable for use as identity anchors in later images.
Style/medium: photorealistic high-end restaurant food photography combined with restrained contemporary editorial poster art direction.
Composition/framing: 3:2 landscape. Hero dish prominent in the lower-left and center-left on a walnut table, fully visible at a 35-degree angle. Preserve broad uncluttered negative space in the upper-right and right-center for a future restaurant name, offer, and call-to-action. The warmly lit interior and storefront cues sit softly in the background without competing with the food.
Lighting/mood: warm 3200K practical glow with a soft directional key from upper left, gentle steam, crisp but natural food highlights, restrained deep-green shadow accents, inviting evening mood.
Color palette: walnut brown, cream, forest green, brass, mahogany red, warm rice white.
Materials/textures: realistic glazed chicken, individual rice grains, hand-thrown matte ceramic, brushed brass, wood grain, clean linen.
Constraints: original fictional restaurant and dish; exactly one hero bowl; realistic edible portion; preserve truthful food texture; no people; no readable text; no letters; no numbers; no logo; no watermark; no menus; no trademarked packaging; no fake signage; safe margins; no excessive retouching.
Avoid: duplicated ingredients, floating garnish, plastic-looking food, impossible steam, oversaturated orange, clutter, fake typography, generic fast-food styling, extreme shallow focus that hides the dish.

1. 顧客に取ってほしい行動を一つ選ぶ

「店を宣伝する」だけでは広すぎます。新メニュー、平日夜の来店、予約、テイクアウトなど一つに絞ります。情報を増やすほどポスターはメニュー表になってしまいます。

産地、割引、数量、品質、健康に関する表現には根拠が必要です。料理を実際より大きく、多く見せるAI加工も避けます。

2. 店舗と料理を別々に正直に撮影する

外観は客が近づく方向から入口と特徴が分かるように、建物の垂直を整えて撮ります。店内は実際の雰囲気を広角で、料理は提供する器・量・付け合わせのまま撮影します。35〜45度と真上の写真、柔らかい拡散光を用意すると後の編集が安定します。

画像制作プロンプト — 店舗・料理の基準写真

Use case: productivity-visual
Asset type: 3:2 landscape instructional blog illustration showing the two honest source photographs required for a restaurant poster
Input images: Image 1 is the visual identity anchor. Preserve its exact fictional restaurant materials and exact signature dish.
Primary request: Create one elegant two-panel photographic contact sheet with no labels. The left panel shows the restaurant exterior source photograph; the right panel shows the signature food source photograph. Both should look like well-shot but minimally edited camera originals suitable for later AI-assisted poster production.
Left panel scene: street-level evening exterior of the same small contemporary restaurant from Image 1, with walnut-framed windows, cream plaster facade, deep forest-green awning with absolutely no writing, one round brushed-brass wall lamp, clean doorway, and warm interior visible through glass. Straight vertical architecture, entire entrance recognizable, no people.
Right panel scene: the exact same wide off-white handmade ceramic bowl with thin forest-green rim, mahogany-red spicy glazed grilled chicken over short-grain rice, charred scallions, sesame, exactly three pale-yellow pickled radish slices, and the same small copper sauce cup. Place it on the same walnut table at a 35-degree camera angle.
Style/medium: photorealistic documentary-commercial photography, truthful and lightly processed rather than a finished advertisement.
Composition/framing: 3:2 landscape overall, two equal panels separated by a narrow cream gutter; clear complete subjects with useful margins; storefront at eye level, food at 35 degrees.
Lighting/mood: evenly exposed blue-hour exterior and soft diffused window light for food, neutral white balance, natural shadows, no dramatic effects.
Color palette: walnut, cream, forest green, brushed brass, mahogany red, warm white.
Materials/textures: accurate facade plaster, clean glass, natural wood, realistic chicken glaze and rice grains, handmade ceramic.
Constraints: preserve the restaurant and dish identity from Image 1; no redesign; no extra dishes; no changed portion; no people; no readable text; no letters; no numbers; no logos; no watermark; no fake signage; no excessive filters; no impossible steam.
Avoid: fisheye distortion, tilted walls, oversaturated food, duplicate garnish, plastic food, fantasy storefront, fake menu boards, heavy vignette.

テーブルや皿の縁は撮影前に整えますが、提供しない食材は追加しません。一時的なごみや汚れは除去しても、入口、窓、オーニング、座席構造は変えません。

3. 変える項目より先に不変条件を書く

器、量、食材、付け合わせの数、店舗外観を固定します。変更可能な項目はクロップ、ホワイトバランス、背景整理、光、接地影、コピー用余白に限定します。OpenAIとGeminiの公式資料も画像入力による編集と、変更・保持条件の明示を案内しています。

画像制作プロンプト — 事実性を保つ料理写真補正

Use case: compositing
Asset type: 3:2 landscape instructional blog illustration showing a truthful restaurant food-photo enhancement
Input images: Image 1 contains two identity references: left is the exact restaurant exterior; right is the exact signature dish. Preserve both faithfully.
Primary request: Create a refined promotional food photograph that places the unchanged signature dish from the right panel of Image 1 on a walnut table beside the recognizable restaurant window and forest-green banquette from the left panel. Improve lighting, crop, background separation, and table styling only; do not redesign or enlarge the food.
Scene/backdrop: inside the same restaurant at blue hour, with the walnut-framed front window softly showing the cream facade, forest-green awning, and warm brass wall lamp beyond. Add only a folded dark-green linen napkin and the same small copper sauce cup.
Subject: exactly the same wide off-white handmade bowl with thin forest-green rim; same quantity and shape of mahogany-red glazed grilled chicken, same rice, charred scallions, sesame, exactly three yellow pickled radish slices, same copper sauce cup.
Style/medium: photorealistic premium food editorial photograph, credible enough to represent the menu served.
Composition/framing: 3:2 landscape, dish fully visible in the right-lower third at a 35-degree angle; storefront cues softly recognizable on the left background; generous clean upper-left negative space for later poster copy; no cropping of bowl.
Lighting/mood: soft directional window light from left, warm practical glow from the brass lamp, subtle cool blue-hour rim, natural steam only, appetizing but honest.
Color palette: walnut, cream, forest green, brass, mahogany red, warm rice white.
Materials/textures: moist glaze without plastic shine, separate rice grains, charred scallion texture, matte handmade ceramic, natural wood.
Constraints: preserve exact menu identity, portion, bowl, garnish count, and restaurant architecture from Image 1; change only composition, lighting integration, minor background cleanup, and styling; no people; no text; no logos; no watermark; no invented ingredients; no oversized portion.
Avoid: food replacement, exaggerated cheese or steam, floating garnish, excessive saturation, fake shallow depth, deformed bowl, altered storefront, duplicated dish, misleading abundance.

元画像と結果を並べ、器の輪郭、肉、米、漬物、ソース、窓、オーニングを比較します。識別要素が変わった場合は元画像を合成し直すか、その結果を使用しません。

4. 料理・場所・イベント中心の三案を比べる

同じ画像に三つのフィルターをかけるのではなく、情報構造を変えます。料理中心は新メニュー、場所中心は開店や雰囲気、イベント中心は期間限定企画に向きます。Fireflyの構成参照は輪郭と奥行きで配置を導き、強度で参照への追従を調整できます。

画像制作プロンプト — 三つのポスターレイアウト

Use case: ads-marketing
Asset type: 3:2 landscape instructional blog illustration comparing three restaurant-poster layout systems
Input images: Image 1 is the exact source-photo identity board for the restaurant and signature dish. Image 2 is the approved enhanced food photograph and campaign lighting reference. Preserve the exact facade, interior palette, bowl, food portion, garnishes, and copper sauce cup.
Primary request: Create a single sophisticated presentation board containing three clearly separated vertical restaurant-poster concept panels side by side. Each panel uses the same exact restaurant and signature dish but demonstrates a meaningfully different hierarchy. Do not generate any text.
Panel 1 — food-first: large bowl in lower-left, clean cream-and-dark-green negative space upper-right for a headline and offer, small storefront detail at bottom-right.
Panel 2 — place-first: recognizable storefront fills upper half, signature bowl on walnut table in lower half, calm centered composition with reserved empty bands for future name and location.
Panel 3 — event-first: dynamic cropped food hero on right-lower third, warm brass lamp and forest-green diagonal shapes guide the eye, broad empty upper-left zone for a limited-time message and CTA.
Style/medium: photorealistic restaurant campaign concepts presented as a premium art-direction contact sheet.
Composition/framing: 3:2 overall; three equal vertical panels with narrow cream gutters, consistent safe margins and balanced visual scale.
Lighting/mood: coherent warm restaurant glow, soft blue-hour accent, appetizing but natural food highlights.
Color palette: walnut brown, cream, forest green, brass, mahogany red, warm white.
Materials/textures: faithful food texture, handmade ceramic, wood grain, cream plaster, green fabric, brushed brass.
Constraints: exact restaurant and dish identity from references; exactly one dish per panel; no portion inflation; no changed ingredients; no readable text; no placeholder letters; no numbers; no logo; no watermark; no people; each panel visually distinct but campaign-consistent.
Avoid: fake typography, mismatched storefront, distorted bowl, excessive food crop, oversaturation, clutter, generic template UI, duplicated dishes inside a panel.

スマートフォンのサムネイルまで縮小し、2秒で料理と見出し領域が分かるか確認します。装飾と文字が衝突する場合は、要素を増やさずクロップや背景面を調整します。

5. 正確な情報はデザインツールで組版する

画像モデルには空白だけを作らせ、店名、料理名、価格、開始・終了日、営業時間、住所、予約・注文方法は編集可能な文字で追加します。書体は2種類以下、整列軸は一つ、アクセント色は一色に抑えます。

画像制作プロンプト — 印刷・モバイル校正

Use case: product-mockup
Asset type: 3:2 landscape instructional blog illustration showing final restaurant-poster proofing across print and mobile
Input images: Image 1 is the approved restaurant campaign key visual and exact signature dish. Image 2 is the source-photo identity board for the exact storefront and food. Preserve both faithfully.
Primary request: Create a photorealistic designer's proofing desk that displays one finished landscape restaurant-poster print and one upright smartphone-sized blank-frame mockup using the same approved campaign image. Both show the exact signature dish and recognizable storefront visual but intentionally leave clean empty zones where real restaurant name, price, hours, location, and CTA will later be typeset.
Scene/backdrop: tidy walnut design desk in a softly lit studio, with one large matte poster proof nearly flat, one slim dark smartphone mockup at the right edge, a small fan of cream/forest-green/brass color swatches, a silver ruler, and a pencil. No software UI.
Subject: poster and phone both reproduce the same exact off-white green-rimmed bowl, mahogany glazed chicken, rice, charred scallions, sesame, exactly three yellow pickled radish slices, copper sauce cup, and the same cream/walnut/green/brass restaurant cues.
Style/medium: high-end photorealistic print-production and campaign-consistency mockup.
Composition/framing: 3:2 landscape; poster occupies most of the frame and is fully visible within safe margins; phone is secondary and does not cover the print; accessories stay at edges. Clear blank headline, details, and CTA zones.
Lighting/mood: neutral color-accurate overhead proofing light, warm ambient spill, soft paper and device shadows, professional calm mood.
Color palette: walnut, cream, forest green, brass, mahogany red, warm white.
Materials/textures: matte premium paper, realistic food print detail, brushed metal ruler, cardstock swatches, dark glass phone surface.
Constraints: preserve exact dish, portion, bowl, garnish, storefront and palette from references; one print and one phone only; no readable text; no letters; no numbers; no logo; no watermark; no hands; no people; no fake app UI; no changed ingredients.
Avoid: warped paper hiding the image, glossy glare, duplicate bowls within one layout, fake typography, cluttered stationery, distorted phone, oversized food, unrelated branding.

トラブルシューティング

公開前チェック

• 量、食材、器、付け合わせが実際の提供内容と同じである。
• 外観、座席、雰囲気が来店する場所を正確に表す。
• 店名、価格、日付、営業時間、住所、CTAを人が確認した。
• 割引、産地、品質、健康表現に必要な根拠がある。
• 写真、ロゴ、フォントの権利と最新ポリシーを確認した。
• 印刷、フィード、縦型の安全域に重要情報が収まる。
• 偽文字、ロゴ、ウォーターマークが残っていない。

まとめ

優れたAI飲食店ポスターは、現実より豪華な店を発明するものではありません。実際の店舗と料理の魅力を明確なメッセージへ編集するものです。正直な基準写真、限定したAI編集、意味の異なる構図案、人が検証する組版を組み合わせれば、洗練と信頼を両立できます。

参考資料

• Google Business Profile — Tips for business-specific photos
• Google Business Profile — Get started for restaurants
• OpenAI — Image generation guide
• Google AI — Image generation and editing
• Adobe Firefly — Match image composition to a reference
• Adobe Firefly — Style reference image

機能とポリシーは変わる可能性があります。実際の広告では地域の表示、食品、原産地、価格表示規則を別途確認してください。