Simulation de selfie caméra frontale

{
  "metadata": {
    "device_simulation": "iPhone 17 Pro front camera",
    "goal": "Authentic selfie photograph mimicking smartphone front-facing optics",
    "output_type": "photograph"
  },
  "camera_system": {
    "lens": {
      "focal_length": "26mm equivalent",
      "aperture": "f/1.8",
      "distortion_profile": "subtle barrel distortion typical of smartphone front lens",
      "depth_estimation": "TrueDepth simulation with accurate face-to-background separation",
      "flare_behavior": "natural micro lens flare along bright backlit edges"
    },
    "sensor": {
      "resolution": "24MP fused sensor output",
      "hdr_engine": "Smart HDR multi-frame tone mapping",
      "noise_profile": {
        "shadows": "fine natural luminance noise",
        "midtones": "clean, textured, unplasticized",
        "highlights": "smooth rolloff without clipped whites"
      },
      "color_space": "Apple wide-gamut display P3 emulation",
      "dynamic_range": "balanced high dynamic range with natural contrast"
    }
  },
  "lighting_simulation": {
    "source_type": "[soft natural daylight through a nearby window]",
    "lighting_quality": "soft directional with feathered shadow gradients",
    "shadow_properties": {
      "edge_quality": "soft, diffused boundaries",
      "density": "natural mid-tone depth",
      "placement": "consistent with handheld selfie angle"
    },
    "highlight_properties": {
      "treatment": "preserved highlights with gentle falloff",
      "skin_reflectance": "subtle micro-specular highlights across nose bridge, forehead, and cheekbones"
    },
    "ambient_fill": "gentle ambient bounce typical of mobile ISP",
    "color_temperature": "[neutral-warm daylight]"
  },
  "subject_rendering": {
    "face": {
      "skin_texture": {
        "pores": "fine visible micro-texture and natural pores",
        "imperfections": "subtle skin variations, micro-blemishes, soft peach fuzz",
        "constraints": "strictly no airbrushing, no glamour smoothing, no plastic CGI surfaces"
      },
      "facial_contours": "natural facial curvature with accurate depth falloff",
      "expression": "[candid gentle smile looking directly into the camera lens]",
      "eye_detail": {
        "reflections": "sharp micro catchlights matching environment lighting",
        "sharpness": "crisp iris pattern with lifelike depth"
      }
    },
    "hair": {
      "strand_detail": "individual hair strands with natural texture variations",
      "flyaways": "subtle realistic stray strands",
      "volume": "[natural medium-density brown hair]",
      "lighting_interaction": "soft sheen with subtle specular highlights"
    },
    "hands_and_arms": {
      "selfie_arm_position": "natural one-handed extension slightly outside lower frame",
      "perspective_distortion": "accurate close-range wide-angle foreshortening"
    }
  }
}