复古网版印刷侧脸肖像海报

"task": "将上传的参考照片(或指定人物广为人知的形象)转换为复古半色调、醒目海报艺术风格的肖像插画。",
  "input": {
    "subject_name": "{{PERSON_NAME}}",
    "reference_image": "{{UPLOADED_PHOTO_OR_NULL}}",
    "note": "只需用户提供主体姓名或上传一张照片。以下所有其他参数均为固定的美术指导规则。"
  },
  "output_exclusions": [
    "不要在海报角落放置真实参考图像的小圆形/圆角插入照片——最终输出只有插画本身,满版出血,不叠加参考缩略图。"
  ],
  "art_style": {
    "medium": "模仿丝网印刷/胶版平印海报艺术的数字插画",
    "influences": ["1960s-70s年代醒目的政治/抗议海报艺术", "Shepard Fairey 式醒目模板插画", "孔版印刷(risograph)质感", "复古杂志封面设计", "复古演唱会/专辑海报艺术"],
    "line_work": "高对比度墨线,以精细的交叉排线和点刻表现阴影,发丝中可见笔触/刷痕",
    "rendering": "平涂色块结合雕版风格的细线阴影——不要照片写实,不要喷枪效果,不要平滑渐变阴影"
  },
  "composition": {
    "pose": "主体头部及上肩部/胸部呈严格的90度侧面轮廓(面朝左),侧面轮廓中目光直视前方,下巴微微抬起,表情中性/自信",
    "framing": "竖幅构图(4:5或3:4画幅比例),主体约占画面垂直高度的70-85%,在胸部中段/肩部处裁切",
    "focal_backdrop": "主体头部后方居中放置一个大型纯色圆形(太阳/光环图案),圆形直径约为画布宽度的60-70%,主体的头发和肩膀略微重叠并突破圆形边缘",
    "hair_treatment": "头发作为最精细的元素之一来刻画——根根分明的流动发丝,风吹或蓬松的动感,强烈的定向光在深色发团中形成高光条纹"
  },
  "background": {
    "base_texture": "粗织亚麻/画布纸张纹理,以低不透明度覆盖整个画面",
    "layout": "圆形后方/周围为不对称的几何色块面板——例如某一下角的纯深色矩形、沿一边的对比色条纹或面板,有时在某一象限填充细密的半色调网点或交叉排线图案",
    "halftone_overlay": "背景面板上隐约叠加可见的CMYK风格半色调网点图案,偶尔渗入人像的阴影区域",
    "grain": "整幅图像带有细腻的模拟印刷颗粒/噪点,营造陈旧的丝网印刷质感"
  },
  "color_palette": {
    "instruction": "每张海报选择一套统一的有限配色(最多2-4种颜色),高对比度,不使用照片式渐变。根据情绪/主体选择,或默认使用经典配色。",
    "classic_scheme": {
      "background_base": "暖奶油色/泛黄纸张米色(约 #e8dcc4)",
      "accent_circle": "醒目的海报红(约 #c1272d)",
      "linework_shadow": "近黑墨色(约 #1a1512)",
      "highlight": "与背景相同的奶油色,用于受光的皮肤/头发区域"
    },
    "alt_scheme_dark": {
      "background_base": "黑色或深炭灰色",
      "accent_circle": "海报红或焦橙色",
      "linework_shadow": "黑色墨水",
      "highlight": "暖奶油色/棕褐色"
    },
    "alt_scheme_cool": {
      "background_base": "深海军蓝",
      "accent_circle": "柔和的砖红/橙色",
      "linework_shadow": "海军蓝/黑色墨水",
      "highlight": "暖奶油色,并让主体真实的眼睛颜色自然可见,作为唯一的全彩点缀"
    },
    "duotone_option": "若要做图形化的波普艺术变体,将整个主体以单一双色调呈现(例如芥末黄与黑色,或金色与黑色),取代奶油色/红色/黑色"
  },
  "typography": {
    "headline": {
      "content": "主体的姓名(名字,或名+姓分两行堆叠)",
      "placement": "海报左上角,与边缘保持内缩距离",
      "font_style": "特粗窄体衬线板体(slab-serif)或怪诞体(grotesque)无衬线字体,全大写,字距紧凑,堆叠为1-2行,字号大(主导性的文字元素)",
      "color": "与线稿/阴影墨色一致,偶尔加入细微的投影或描边以增强层次"
    },
    "subheadline": {
      "content": "一句与主体相关的2-4词简短标语/称号(例如富有感染力的头衔、昵称或描述语)",
      "placement": "紧贴标题下方,字号较小",
      "font_style": "粗体窄体无衬线或板体衬线字体,全大写,单行",
      "color": "海报的强调色(与圆形颜色一致)"
    }
  },
  "clothing_and_accessories": {
    "styling": "简洁、符合时代或现代极简的服装,以平涂色彩呈现,采用与作品其余部分相同的半色调/线稿阴影——衬衫领、西装外套、露肩上衣或带有可见面料褶皱线条的纹理夹克",
    "accessories": "保持极简——若参考图中有,可加入小件首饰(耳环、项链),以简单的线稿形状呈现"
  },
  "lighting": {
    "style": "单一的硬质定向光源(仿佛掠过侧面轮廓),形成强烈的图形化阴影形状,而非写实的柔和阴影",
    "shadow_rendering": "阴影由交叉排线、点刻和半色调网点密度构成,而非平滑渐变"
  },
  "quality_and_fidelity": {
    "likeness": "保留参考照片/姓名所对应主体准确、可辨识的面部比例和特征,并转化为插画线稿风格——插画必须能清楚辨认出是那位特定人物",
    "resolution": "清晰、可直接用于海报印刷的品质,线条锐利,无模糊,无照片瑕疵",
    "consistency": "无论主体是谁,都保持上述相同的构图、配色规则和文字位置,使整套作品呈现为统一的海报系列"
  }

"task": "Convert the uploaded reference photo (or a well-known likeness of the named person) into a vintage halftone bold poster-art style portrait illustration.",
  "input": {
    "subject_name": "{{PERSON_NAME}}",
    "reference_image": "{{UPLOADED_PHOTO_OR_NULL}}",
    "note": "Only the subject's name or an uploaded photo should be required from the user. All other parameters below are fixed art-direction rules."
  },
  "output_exclusions": [
    "Do NOT include a small circular/rounded-corner inset photo of the real reference image in the corner of the poster — the final output is the illustration ONLY, full-bleed, no reference thumbnail overlay."
  ],
  "art_style": {
    "medium": "digital illustration mimicking screen-printed / offset-lithograph poster art",
    "influences": ["1960s-70s bold political/protest poster art", "Shepard Fairey-style bold stencil illustration", "risograph print texture", "vintage magazine cover design", "retro concert/album poster art"],
    "line_work": "high-contrast ink linework with fine cross-hatching and stippling for shading, visible pen/brush strokes in hair strands",
    "rendering": "flat color blocking combined with engraving-style fine line shading — NOT photorealistic, NOT airbrushed, NOT smooth gradient shading"
  },
  "composition": {
    "pose": "subject's head and upper shoulders/chest in a strict 90-degree side profile (facing left), eyes looking straight ahead in profile, chin slightly lifted, neutral/confident expression",
    "framing": "portrait orientation (4:5 or 3:4 aspect ratio), subject fills roughly 70-85% of vertical frame, cropped at mid-chest/shoulder",
    "focal_backdrop": "a large solid-color circle (sun/halo motif) centered behind the subject's head, circle diameter roughly 60-70% of canvas width, subject's hair and shoulders slightly overlap and break the circle's edge",
    "hair_treatment": "hair rendered as one of the most detailed elements — individual flowing strands, wind-swept or voluminous movement, strong directional lighting creating highlight streaks within the dark mass of hair"
  },
  "background": {
    "base_texture": "coarse woven linen/canvas paper texture overlaid across the entire composition at low opacity",
    "layout": "asymmetric geometric color-block panels behind/around the circle — e.g. a solid dark rectangle in one lower corner, a contrasting stripe or panel along one edge, sometimes a fine halftone dot-pattern or crosshatch pattern filling one quadrant",
    "halftone_overlay": "visible CMYK-style halftone dot pattern subtly overlaid on background panels and occasionally bleeding into the portrait's shadow areas",
    "grain": "fine analog print grain/noise across the whole image for an aged, screen-printed look"
  },
  "color_palette": {
    "instruction": "Select ONE cohesive limited palette (2-4 colors max) per poster, high contrast, no photographic gradients. Choose based on mood/subject or default to the classic scheme.",
    "classic_scheme": {
      "background_base": "warm cream / aged paper beige (#e8dcc4-ish)",
      "accent_circle": "bold poster red (#c1272d-ish)",
      "linework_shadow": "near-black ink (#1a1512-ish)",
      "highlight": "same cream as background used for lit skin/hair areas"
    },
    "alt_scheme_dark": {
      "background_base": "black or deep charcoal",
      "accent_circle": "poster red or burnt orange",
      "linework_shadow": "black ink",
      "highlight": "warm cream/tan"
    },
    "alt_scheme_cool": {
      "background_base": "deep navy blue",
      "accent_circle": "muted brick-red/orange",
      "linework_shadow": "navy/black ink",
      "highlight": "warm cream, with the subject's true eye color kept naturally visible as the one full-color accent"
    },
    "duotone_option": "for a graphic pop-art variant, render the entire subject in a single duotone (e.g. mustard-yellow and black, or gold and black) instead of cream/red/black"
  },
  "typography": {
    "headline": {
      "content": "subject's name (first name, or first+last stacked on two lines)",
      "placement": "top-left corner of the poster, inset from edges",
      "font_style": "extra-bold condensed slab-serif or grotesque sans-serif, all caps, tightly kerned, stacked on 1-2 lines, large scale (dominant typographic element)",
      "color": "matches the linework/shadow ink color, occasionally with a subtle drop shadow or outline for depth"
    },
    "subheadline": {
      "content": "a short 2-4 word tagline/epithet related to the subject (e.g. an evocative title, nickname, or descriptor)",
      "placement": "directly below the headline, smaller scale",
      "font_style": "bold condensed sans-serif or slab-serif, all caps, single line",
      "color": "the poster's accent color (matches the circle color)"
    }
  },
  "clothing_and_accessories": {
    "styling": "simple, era-appropriate or modern minimal clothing rendered in flat color with the same halftone/linework shading as the rest of the piece — collared shirts, blazers, off-shoulder tops, or textured jackets with visible fabric-fold linework",
    "accessories": "keep minimal — small jewelry (earrings, necklace) can be included if present in reference, rendered as simple line-art shapes"
  },
  "lighting": {
    "style": "single hard directional light source (as if raking across the side profile), creating strong graphic shadow shapes rather than realistic soft shading",
    "shadow_rendering": "shadows built from crosshatching, stippling, and halftone dot density rather than smooth gradients"
  },
  "quality_and_fidelity": {
    "likeness": "preserve accurate, recognizable facial proportions and features of the subject from the reference photo/name, translated into the illustrated line-art style — the illustration must be clearly identifiable as that specific person",
    "resolution": "crisp, poster-print-ready quality, sharp linework, no blur, no photographic artifacts",
    "consistency": "maintain identical composition, palette rules, and typography placement described above regardless of subject, so the whole set reads as one unified poster series"
  }