穿越时空的滤镜——老照片修复

使用玻璃滤镜实现对老照片核心部分的“修复”。效果图包括：

1. 清华二校门老照片（被毁之前）
2. 恭亲王照片（大概是中国人最早的相片）
3. 老登李鸿章
4. 20元钞票中的风景（漓江）

对提供的照片，根据提示词生成图片，滤镜采用大滤镜，使用彩色呈现。
{
  "type": "augmented_reality_filter_synthesis",
  "aspect_ratio": "16:9",
  "instruction": "CRITICAL: This is an IMAGE-TO-IMAGE task, not a text-to-image generation. You must strictly preserve the pixels of the {{UPLOADED_IMAGE_FILE}} as the background. Do not generate a new scene based on description. Only the area INSIDE the glass filter is allowed to change.",

  "global_constraints": {
    "source_fidelity": "The background outside the filter must be an EXACT pixel-match to {{UPLOADED_IMAGE_FILE}}. Do not alter, crop, expand, or 'reimagine' the background context.",
    "context_isolation": "Ignore all previous images or conversation topics. Focus EXCLUSIVELY on the current uploaded file.",
    "modification_scope": "modifications are STRICTLY limited to the area inside the glass filter lens."
  },

  "dynamic_analysis_module": {
    "step_1_focal_point_extraction": {
      "task": "Identify the coordinates of the main subject (Face/Object) in the current file to position the filter.",
      "output_variable": "[TARGET_COORDINATES]",
      "logic": "Find the center of interest solely within the provided image."
    },
    "step_2_filter_specs": {
      "task": "Determine filter parameters based on the subject.",
      "output_variable_shape": "[FILTER_SHAPE]",
      "output_variable_style": "[HD_RESTORATION_STYLE]",
      "logic": "Face -> Circular/Oval + Skin Restoration. Building -> Rectangular + Structure Sharpening."
    }
  },

  "system_prompt_logic": {
    "main_premise": "A first-person view of a hand holding a [FILTER_SHAPE] glass lens over the actual physical print of {{UPLOADED_IMAGE_FILE}}.",

    "layer_definition_logic": {
      "layer_1_background_immutable": {
        "z_index": "Background (The Original Image)",
        "content": "The original {{UPLOADED_IMAGE_FILE}} displayed as a large physical print or wall projection.",
        "strict_rules": {
          "NO_GENERATION": "Do not generate new scenery. Use the uploaded image as a fixed texture map.",
          "NO_EXPANSION": "Do not attempt to extend the image borders. Show the image exactly as provided, framing it to fill the background.",
          "visual_state": "Must retain all original artifacts: noise, blur, scratches, B&W tone, and low resolution. This is the 'Before' state."
        }
      },
      
      "layer_2_foreground_hand": {
        "z_index": "Foreground (Overlay)",
        "content": "A realistic human hand holding a [FILTER_SHAPE] optical glass lens.",
        "positioning": "The hand enters from the edge (unobtrusive). The glass lens is positioned directly over [TARGET_COORDINATES].",
        "lighting": "The hand casts a subtle shadow onto the background print to create depth."
      },

      "layer_3_filter_throughput": {
        "z_index": "Lens Interior (The Transformation)",
        "content": "The specific pixels visible *through* the glass lens.",
        "visual_transformation": {
          "action": "Upscale and colorize ONLY the pixels inside the lens boundary.",
          "style": "[HD_RESTORATION_STYLE] (4K resolution, realistic textures, vibrant lighting).",
          "contrast_lock": "The separation is absolute. Outside the line = Old/Blurry. Inside the line = New/Sharp. No fading gradients."
        }
      }
    }
  }
}

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