{
  "overall_score": 6,
  "issues": [
    {
      "criterion": 4,
      "description": "Six parallel arrows from three input boxes (input1, input2, input3) to left_frames and right_frames create visual clutter and redundancy. Each input sends both 'Left' and 'Right' arrows to the same targets.",
      "suggestion": "Collapse these six connections into a single 'delegates down' rail outside the content area. Create a bus-style connection where a single arrow bundle emerges from the input region and branches to both left_frames and right_frames, or use a single arrow from each input that splits at a junction point."
    },
    {
      "criterion": 3,
      "description": "The three input boxes at y=50, 130, 210 (with 60px height each) have only 20px vertical gaps between them. This tight spacing makes it difficult for arrows to pass through clear corridors without overlapping or crossing through box interiors.",
      "suggestion": "Increase the vertical spacing between input boxes to at least 40-50px gaps. This will provide clearer corridors for the parallel arrows and improve visual separation between same-layer connections."
    },
    {
      "criterion": 1,
      "description": "Multiple arrows converge on the same connection points (e.g., left_frames receives arrows from input1, input2, input3, and also connects to ece_module and feature_extraction_left). The arrow routing may not consistently avoid passing through box interiors.",
      "suggestion": "Implement explicit waypoints or junction points for arrows to ensure they route through gaps between boxes. Consider using orthogonal routing with 90-degree turns to navigate around box interiors."
    },
    {
      "criterion": 2,
      "description": "Arrow labels ('Left', 'Right', 'Left Event Frames', 'Energy Maps', 'Confidence Maps', 'Left Features', 'Right Features', 'CPV', 'Disparity') are present but their offset distances from arrow lines are not specified in the diagram metadata.",
      "suggestion": "Ensure all arrow labels are offset 6-8px from the arrow line. Add background rectangles (with the same color as the diagram background) behind labels only when the offset would cause the label to overlap with other elements or fall outside the viewBox."
    },
    {
      "criterion": 6,
      "description": "The current layout spans approximately 1020px width and 320px height. While the elements are not extremely cramped, the horizontal spacing between columns (320→540, 540→760, 760→980, each 220px) could benefit from additional breathing room.",
      "suggestion": "Increase the viewBox dimensions to provide more margin around the content. Consider expanding the viewBox by 50-100px on each side to create cleaner visual boundaries and reduce the 'packed' feeling of the diagram."
    },
    {
      "criterion": 3,
      "description": "The CPV Construction hexagon at y=250 receives three separate arrows (from confidence_maps, feature_extraction_left, and feature_extraction_right). These arrows may overlap or create visual confusion at the entry point.",
      "suggestion": "Add explicit junction points or stagger the entry points of these three arrows along the left edge of the CPV Construction hexagon to create distinct visual corridors for each connection."
    }
  ],
  "summary": "The diagram effectively illustrates the Confidence-Driven Stereo Matching pipeline architecture with clear color-coding and logical left-to-right flow. However, it suffers from visual clutter due to multiple parallel arrows (6 arrows from 3 inputs to 2 targets), tight inter-row spacing (20px gaps), and potential arrow routing through box interiors. The main improvements needed are: (1) consolidating repeated cross-layer arrows into delegation rails, (2) widening gutters between same-layer elements, (3) ensuring consistent arrow routing through gaps, and (4) expanding the viewBox for better visual breathing room. The color scheme and module shapes are appropriate for an academic architecture diagram.",
  "source_svg": "/root/.openclaw/workspace/skills/thesis-illustration/output/test_batch/test_80.svg",
  "source_desc": "/root/.openclaw/workspace/skills/thesis-illustration/output/test_batch/test_80_desc.json",
  "model": "MiniMax-M2.7-BF16"
}