imageFX用にシステム化したプロンプトフォーマットを作る
imageFXはGoogleアカウントを持っていれば誰でも使う事が出来るAI画像生成サイトです。
先ずはこの画像をご覧ください。
衣装の話は置いといて、今回は思い通りになる様な画像指定のオハナシ。
我々の様な写真界隈の人間だと、この画像を見た瞬間に「明るい中望遠レンズで、カメラはボカシやすいラージフォーマットのカメラかな？ 滑らかなので感度はそんなに上げてない。ライティングも地灯り活かし？」と言う所までは読みとれる。
で、この画像のプロンプトですが…
This is a photograph of a Japanese actress taken for a scene from a movie.
Facial expression and hairstyle: Short straight dark brown hair.
Outfit: White, slim fit, striped sailor collar, thin, stretchy mini dress.
Pose: Looking backwards at the camera.
Background: Illuminations are out of focus.
Photography data: Full-frame digital camera, 85mm, f1.4, 1/30sec, iso400, tungsten lamp
こんな感じにしてみました。
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シチュエーション＆人物像
大抵は「日本人女優が映画の撮影してるワンシーン」という事で大丈夫かと思われます。
年齢の指定はあえてしません。そんな物を指定しなくても、状況に似合った年代の子を必ず出力してくれるからです。そこにこだわって出力落とすよりお任せした方が安定します。
Facial expression and hairstyle: 髪型と顔の特徴
Outfit: 衣装
Pose: ポーズ・行動
Background: 背景
Photography data: 撮影データ
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いままでゴチャっと混ぜて書いていたのを、項目別に区切ってみたワケです。大抵のイメージはこれで大丈夫だと思います。
ちなみに、冒頭の画像はちょっと弄るとこうなります。
A photo of a Japanese actress taken in a scene from a movie.
Expression and hairstyle: Short straight dark brown hair. Red ribbon tied in a hairband. Serious expression.
Outfit: Navy blue, long-sleeved, loose-fitting knee-length dress. Barefoot.
Pose: Black cat sitting on shoulder. Holding a long-handled broom, looking back at the camera.
Background: Street lights of a rural town at night.
Shooting data: Full-frame digital camera, 50mm, f1.4, 1/30 sec, iso400, tungsten lamp
A photo of a Japanese actress taken in a scene from a movie.
Expression and hairstyle: Short, straight, dark brown hair. Serious expression with a red ribbon tied in a hairband.
Clothing: Navy blue, long-sleeved, loose-fitting, knee-length dress. Barefoot.
Pose: She appears to be floating in the air astride a long-handled broom. She looks back at the camera while in flight. A black cat sits on the end of the broom.
Background: A dark night, flying above the clouds, with the nightscape of medieval Europe stretching out in the distance below her.
Shooting data: Full-frame digital camera, 28mm, f4, 1/30 sec, ISO400, pale moonlight
上記の作例の様に『映画のワンシーン』だと女の子が空飛ぶくらいにぶっ飛んだ設定でも『まあ映画だからね』とFX氏も納得してくれるみたです。
この様に最初の「シチュエーション＆人物像」は殆どの場合、絵空事であるとしておいた方が無難なので「映画（またはドラマ・TVショー）のワンシーンとして撮影された日本人女優の写真です。」が万能だと思います。
現実味あるリアルな設定も可能ですが、下手にリアリティ追求して、例えばスポーツシーンでリアルな競技中のアスリートであるとしてしまうと、殆どの場合顔つきがリアルなアスリート顔になってしまいます。
この場合でも年齢は基本的に指定しないで大丈夫ですが、出力が低い時は年齢設定を30歳辺りから上下試してみるのがいいと思います。
ではスポーツ選手で試してみます。
テニス。
インパクトの瞬間ですね～
A photo of a beautiful Japanese actress playing tennis for a scene from a movie.
Face and hairstyle: Long eyelashes, smooth white skin, large eyes, square face, dark hair in a ponytail. Pink sun visor.
Outfit: Pink, slim, collared, thin, stretchy mini dress. "YONEX" logo.
Pose: The moment she powerfully hits the ball back.
Background: Tennis court in bright daylight, the spectators are out of focus.
Photography data: Full-frame digital camera, 300mm, f2.8, 1/500sec, iso400, daylight
運動しているシーンは糸目のアスリート顔になりがちなので、美しいとか、顔立ちや目が大きい等のワードをしつこいくらい入れています。
まあ結構プロンプト通りになってる気がします。
では特撮行ってみましょう。
戦う前の名乗りのシーン… みたいなのを出してみたかったんですが。
出来としては60点くらいかな～
A photo of a beautiful Japanese actress wearing futuristic armor for a scene from a special effects movie.
Facial expression and hairstyle: Long eyelashes, smooth white skin, large eyes, round face, long brown wavy hair.
Clothes: Carbon armor modeled after a medieval knight, with a surface design that looks like it has circuits built into it. Black innerwear with a collar, metal plates in the shape of a miniskirt, and boots with the same design as the black pantyhose armor.
Pose: She is in a fighting stance, holding the hilt of a sword with circuits printed on it with both hands. She is shouting at the camera.
Background: In front of a dimly lit ruin. The setting sun is backlighting her.
Photography data: Full-frame digital camera, 300mm, f2.8, 1/15sec, iso400, daylight
スカウターを追加
A photo of a beautiful Japanese actress wearing futuristic armor in a scene from a special effects movie.
Expression and hairstyle: Long eyelashes, smooth white skin, big eyes, round face, black bob.
Clothing: Carbon armor imitating a medieval knight with a surface design that looks like it has circuits built into it. Black innerwear with a collar, metal plates in the shape of a miniskirt, boots with the same design as the black pantyhose armor. Mechanical visor that covers only one eye.
Pose: Holding up the hilt of a sword with a printed circuit in one hand, she is in a fighting stance facing the camera. Touching the visor with the other hand. Screaming at the camera.
Background: A deserted beach as the sun rises. An aircraft carrier in the distance. Backlit by the setting sun.
Shooting data: Full-frame digital camera, 300mm, f2.8, 1/15sec, iso400, daylight
ではここで『架空坂◢⁴⁶』を召喚ｗ
理由は後述しますが、これは映画じゃなくて、普通にプロモーションビデオ撮影にしましょう。
A photo of a beautiful Japanese actress taken for a promotional video.
Face and hairstyle: Oval face, natural makeup, brown hair in a ponytail.
Clothes: Burgundy blazer with gold buttons and purple trim. White blouse with collar and purple tie. Mini-length burgundy wrap skirt with purple trim. Navy blue socks and brown leather shoes. A small emblem of the school's crest is embroidered on the chest.
Pose: One foot bounces up joyfully, arms bent upwards from the waist. Smiling at the camera.
Background: Cobblestones in front of a light-colored Western-style wooden house. Bright sunlight illuminates her.
Shooting data: Full-frame digital camera, 50mm, f14.1/125sec, iso100, daylight
サムネ絵は上の応用で、人数増やしました。
同じ衣装で人数が増えると、髪や顔立ちが揃いがちになるので、意図的にセンターだけ明確な違いをして指定しています。
This is a photo of three beautiful Japanese actresses taken for a promotional video.
Facial expressions and hairstyles: All of them have different hairstyles. Only the woman in the middle has a ponytail and wears glasses.
Clothes: All of them wear the same outfit. A burgundy blazer with gold buttons and purple trim. A white blouse with a collar and a purple tie. A short, burgundy wrap skirt with purple trim. They wear navy blue socks and brown leather shoes. A small emblem of the school's crest is embroidered on the chest.
Pose: All of them are jumping happily, with their arms bent above their waists. They are looking at the camera and smiling.
Background: Cobblestones in front of a light-colored Western-style building. Bright sunlight is illuminating them.
Shooting data: Full-frame digital camera, 50mm, f1.4,1/125sec, iso100, daylight
人数を均等に増やすと顔のクオリティが落ちていく気がします。
やるなら「フロントメンバー数人＋その他」みたいな感じがいいかも。
This is a photo of eight beautiful Japanese actresses taken for a promotional video.
Facial expressions and hairstyles: All of them have different hairstyles. Only the woman in the middle has a ponytail and wears glasses.
Clothing: All of them are wearing the same clothes. A wine-red blazer with gold buttons and purple trim. A white blouse with a collar and a purple tie. A short wine-red wrap skirt with purple trim. They are wearing navy blue socks and brown leather shoes. A small emblem of the school's crest is embroidered on their chests.
Pose: All of them are in the same pose, brightly lit by the setting sun. They are singing and dancing happily with their arms bent above their waists. They are looking at the camera and smiling.
Background: A terrace stage in front of a Western-style building lit by the setting sun. The letters "kakuzaka" made with lighting.
Shooting data: Full-frame digital camera, 50mm, f1.4, 1/125 sec, iso100, sunset
This is a photo of three beautiful Japanese actresses taken for a promotional video.
Expressions and hairstyles: All of them have different hairstyles. Only the woman in the middle has a ponytail and wears glasses.
Clothes: All of them are wearing the same clothes. A wine-red blazer with gold buttons and purple trim. A white blouse with a collar and a purple tie. A short wine-red wrap skirt with purple trim. They are wearing navy blue socks and brown leather shoes. A small emblem of the school's crest is embroidered on the chest.
Pose: All of them are happily celebrating around a whole cake with "1200" written on it on a table, spreading their arms out in front of them. They are looking at the camera and smiling with their mouths slightly open.
Background: Inside a classical cafe at night. The bright interior lighting illuminates her.
Shooting data: Full-frame digital camera, 28mm, f4.1/125sec, iso100, tungsten light
やむを得ず「キャンディ」で代用しました
This is a photo of three beautiful Japanese actresses taken for a promotional video.
Expressions and hairstyles: All of them have different hairstyles. Only the woman in the middle has a ponytail and wears glasses.
Clothes: All of them are wearing the same clothes. A wine-red blazer with gold buttons and purple trim. A white blouse with a collar and a purple tie. A wine-red short wrap skirt with purple trim. They are wearing navy blue socks and brown leather shoes. A small emblem of the school's coat of arms is embroidered on their chests.
Pose: All of them are licking tulip-shaped candies. They are looking at the camera and smiling with their tongues out.
Background: A cityscape with colorful buildings is out of focus. Bright sunlight is illuminating them.
Shooting data: Full-frame digital camera, 50mm, f1.4. 1/125sec, iso100, daylight
この様に衣装と人物像を固定しておいて、行動と背景のみの変化で簡単にストーリーを展開していく事が出来ます。
このフォーマットの良い所は、指示が項目別になっているので、出力されなかった時の問題の切り分けがしやすい事ですかね。
例えば最後の、架空坂◢⁴⁶ は、冒頭句が映画のワンシーンだとエラーになります。
プロモーションビデオだとimageFXが納得してくれる様ですね。
このプロンプトは、全体でエラーになった時に後半を一旦全部削って、項目を順番に足して行きながら、どこが引っかかっているのかを探し出していく。その作業がしやすくなっています。
さて、今回は今までのプロンプトと更に明確な違いがあります。それは文末の撮影データですね。
以前からレフ版入れたり、4K RAW PHOTO.の指定や、背景のぼかしなど写真のテクニックを部分的に放り込んでいたのですが、今回はそれを指定しやすい様に文末にまとめました。
これについては森野熊造さんが書いた記事を参照して下さい。
文末の撮影データは文字レイヤ最終ページて事もあって、たくさん詰め込んだところで反映されるかはガチャ要素です。適用されたらラッキー程度にお考え下さい。背景ぼかしに関しては背景指定の段階で「アウトフォーカスしている」と明確に指示した方が確実です。とは言え、冒頭の画像とかは結構データが反映されてますよね？
皆さんも是非、このフォーマットでオリジナル画像を作ってみて下さい。
ではまた！
オマケ画像
以前アップしたバイク女子の画像を、今回紹介したプロンプトフォーマットで書き直してみました。
多分こっちの方が応用効くから楽かもしれません。
A photo of a Japanese actress taken in a scene from a movie.
Expression and hairstyle: Dark brown wavy long hair.
Outfit: Black, thin, slim-fitting tube mini dress.
Pose: Sitting on the seat of a red Yamaha motorcycle, looking back at the camera.
Background: In a parking lot on a mountain road as the sun rises. The background is out of focus.
Shooting data: Full-frame digital camera, 85mm, f1.4, 1/30 sec, iso400, daylight
いいなと思ったら応援しよう！
