Add AOI hotspot strict audit for 20nm compare

AGENTS.md

@@ -115,12 +115,18 @@ When changing the primary compare page:
 For the current 20nm visual baseline, prefer:
 
 - [`navsea_strict_audit.py`](/root/sourceserver/pbf/navsea_strict_audit.py)
+- [`strict_audit_hotspots_20nm.json`](/root/sourceserver/pbf/strict_audit_hotspots_20nm.json)
 
 This script combines:
 
 - browser-rendered screenshot diff from the fixed compare page
 - backend render audit summary from the current 20nm audit JSON
 
+And now focuses on:
+
+- small AOI hotspot crops that are chosen to calibrate backend audit blind spots
+- not just one coarse full-screen diff number
+
 Use it when you need one report that explains both:
 
 - what the user really sees

STEP_RECORD.md

@@ -334,12 +334,23 @@ Remote: `ssh://git@nas:2222/tei/pbf.git`
 本轮已新增统一审计脚本：
 
 - [`navsea_strict_audit.py`](/root/sourceserver/pbf/navsea_strict_audit.py)
+- [`strict_audit_hotspots_20nm.json`](/root/sourceserver/pbf/strict_audit_hotspots_20nm.json)
 
 它会把两部分合并到同一份报告里：
 
 - 浏览器真实出图截图差异
 - 当前 20nm backend render audit 摘要
 
+但当前实际工作方式已经进一步收紧为：
+
+- 后台 render audit 是主审计
+- 小范围 AOI 图像审计是校准审计
+- 不再只看整屏大 diff
+- 只盯后台最容易误判的热点区域：
+  - 航标 / 灯塔 / 红绿标识
+  - 鱼礁 / 碍航点
+  - 远处 symbol / 小灯
+
 当前产物：
 
 - [strict_audit_summary.md](/root/sourceserver/pbf/report/strict_audit/strict_audit_summary.md)
@@ -348,25 +359,36 @@ Remote: `ssh://git@nas:2222/tei/pbf.git`
 - [compare_left.png](/root/sourceserver/pbf/report/strict_audit/compare_left.png)
 - [compare_right.png](/root/sourceserver/pbf/report/strict_audit/compare_right.png)
 - [compare_diff.png](/root/sourceserver/pbf/report/strict_audit/compare_diff.png)
+- [report/strict_audit/hotspots](/root/sourceserver/pbf/report/strict_audit/hotspots)
 
 当前 `r7` strict audit 结论：
 
 - compare version:
   - `20nm-r7-20260331-2044`
 - visual changed ratio:
-  - `0.887847`
+  - `0.899848`
 - changed pixels:
-  - `411961 / 464000`
+  - `230361 / 256000`
 - backend render audit 总体仍是：
   - `extra_in_engineering = 258317`
   - `missing_in_engineering = 258317`
 
+当前热点 AOI 排名：
+
+1. `southwest_lighthouse_cluster`
+   - changed ratio: `0.972315`
+2. `takashima_main_harbor_marks`
+   - changed ratio: `0.783759`
+3. `takashima_inner_nearshore_hazards`
+   - changed ratio: `0.744246`
+4. `east_breakwater_marks`
+   - changed ratio: `0.617833`
+
 这份统一审计的意义是：
 
-- 以后不再把“视觉变好了”与“后台数字没变”当成互相冲突
-- 可以一眼看出：
-  - 浏览器真实出图变没变
-  - 后台 render audit 有没有跟上
+- 以后不再只靠整屏图像差异判断问题
+- 可以用少量热点小框去校准后台 render audit 的盲区
+- 当用户肉眼说“这里还不对”时，可以直接把那个区域加入热点审计并复跑
 
 线上已同步：
 
@@ -701,21 +723,26 @@ Style 语义专项里仍最重要的是：
 
 下次继续时，建议按这个顺序推进：
 
-- 先以固定页面
-  - `http://192.168.200.184/newpec/domain/navsea-compare-legacy-domain-compatible.html`
+- 固定只用：
+  - `http://192.168.200.184/newpec/navsea-compare-karatsu-20nm.html`
   作为唯一视觉基线
-- 以 [`src/Domain/style.domain-legacy-compatible-karatsu-10nm.deployed-2026-03-31.json`](/root/sourceserver/pbf/src/Domain/style.domain-legacy-compatible-karatsu-10nm.deployed-2026-03-31.json)
-  作为“最接近旧版”的右侧样式母版
-- 在 Domain compatible 线上逐层确认：
-  - 哪些 layer 仍依赖 legacy 日文字段
-  - 哪些可以直接切到标准字段而不改变视觉
-  - 哪些需要加兼容映射才能保持视觉不变
+- 固定只用：
+  - `/home/wwwroot/pbf-delivery-karatsu-20nm`
+  作为当前 delivery PBF
+- 先围绕 strict audit 热点逐组修：
+  - `southwest_lighthouse_cluster`
+  - `takashima_main_harbor_marks`
+  - `takashima_inner_nearshore_hazards`
+  - `east_breakwater_marks`
+- 每修一轮就重跑：
+  - [`navsea_strict_audit.py`](/root/sourceserver/pbf/navsea_strict_audit.py)
+- 目的不是追求整屏 diff 立刻变小，而是让后台 render audit 对热点问题的判断逐步和肉眼一致
 
-当前真正的下一步不再是继续调 `20nm compare` 页面，而是：
+当前真正的下一步是：
 
-- 把 deployed baseline style 中对 legacy 字段的依赖系统列出来
-- 以固定 compare 页面做逐步替换验证
-- 每次替换后只在这一个页面上检查视觉回归
+- 把用户指出的新问题优先落进热点 AOI
+- 用热点截图和点击拾取结果对照右侧实际图层与属性
+- 再决定是继续修 [`style.navsea-delivery-karatsu-10nm.json`](/root/sourceserver/pbf/src/pbf/style.navsea-delivery-karatsu-10nm.json)，还是回到 builder 补更细的 delivery 语义字段
 
 ## Important Notes
 
@@ -729,4 +756,4 @@ Style 语义专项里仍最重要的是：
 
 下次开机如果要快速接上，可以先看这份文件，再按下面这句继续：
 
-`继续处理 STEP_RECORD.md 里记录的固定 compare 基线，围绕 navsea-compare-legacy-domain-compatible.html 这一个页面，在 pbf-domain-karatsu-10nm 线上逐步去掉日文字段依赖，同时保持视觉尽量不变。`
+`继续处理 STEP_RECORD.md 里记录的 20nm 固定 compare 基线，围绕 navsea-compare-karatsu-20nm.html 这一个页面和 pbf-delivery-karatsu-20nm 这套 PBF，按 strict audit 的热点 AOI 逐组修视觉问题，并用小范围图像审计去校准后台 render audit。`

navsea_strict_audit.py

@@ -5,7 +5,6 @@ import argparse
 import json
 import re
 import subprocess
-import tempfile
 from dataclasses import dataclass
 from pathlib import Path
 from typing import Any
@@ -19,6 +18,7 @@ DEFAULT_BACKEND_AUDIT_JSON = Path(
     "/root/sourceserver/pbf/NavSea_Original_vs_Delivery_Render_Audit_Karatsu_20nm_2026-03-31.r7.json"
 )
 DEFAULT_OUTPUT_DIR = Path("/root/sourceserver/pbf/report/strict_audit")
+DEFAULT_HOTSPOTS_PATH = Path("/root/sourceserver/pbf/strict_audit_hotspots_20nm.json")
 
 
 @dataclass
@@ -32,6 +32,15 @@ class CropBox:
         return (self.left, self.top, self.right, self.bottom)
 
 
+@dataclass(frozen=True)
+class HotspotSpec:
+    id: str
+    label: str
+    notes: str
+    pane_box_norm: tuple[float, float, float, float]
+    backend_focus: tuple[str, ...]
+
+
 def parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(
         description="Run strict audit by combining browser-rendered visual diff with backend render audit summary."
@@ -39,11 +48,12 @@ def parse_args() -> argparse.Namespace:
     parser.add_argument("--compare-url", default=DEFAULT_COMPARE_URL)
     parser.add_argument("--backend-audit-json", type=Path, default=DEFAULT_BACKEND_AUDIT_JSON)
     parser.add_argument("--output-dir", type=Path, default=DEFAULT_OUTPUT_DIR)
-    parser.add_argument("--width", type=int, default=1600)
-    parser.add_argument("--height", type=int, default=900)
+    parser.add_argument("--width", type=int, default=1280)
+    parser.add_argument("--height", type=int, default=720)
     parser.add_argument("--toolbar-height", type=int, default=150)
     parser.add_argument("--bottom-trim", type=int, default=170)
-    parser.add_argument("--timeout-sec", type=int, default=90)
+    parser.add_argument("--timeout-sec", type=int, default=120)
+    parser.add_argument("--hotspots-json", type=Path, default=DEFAULT_HOTSPOTS_PATH)
     return parser.parse_args()
 
 
@@ -65,7 +75,7 @@ def run_browser_screenshot(compare_url: str, output_png: Path, width: int, heigh
         "--disable-gpu",
         "--enable-unsafe-swiftshader",
         "--no-sandbox",
-        "--virtual-time-budget=20000",
+        "--virtual-time-budget=15000",
         f"--window-size={width},{height}",
         f"--screenshot={output_png}",
         compare_url,
@@ -82,6 +92,30 @@ def build_crop_boxes(image_width: int, image_height: int, toolbar_height: int, b
     return left_box, right_box
 
 
+def load_hotspots(hotspots_json: Path) -> list[HotspotSpec]:
+    raw = json.loads(hotspots_json.read_text())
+    hotspots: list[HotspotSpec] = []
+    for item in raw:
+        hotspots.append(
+            HotspotSpec(
+                id=item["id"],
+                label=item["label"],
+                notes=item.get("notes", ""),
+                pane_box_norm=tuple(item["pane_box_norm"]),
+                backend_focus=tuple(item.get("backend_focus", [])),
+            )
+        )
+    return hotspots
+
+
+def normalized_box_to_pixels(box_norm: tuple[float, float, float, float], pane_width: int, pane_height: int) -> CropBox:
+    left = max(0, min(pane_width, round(box_norm[0] * pane_width)))
+    top = max(0, min(pane_height, round(box_norm[1] * pane_height)))
+    right = max(left + 1, min(pane_width, round(box_norm[2] * pane_width)))
+    bottom = max(top + 1, min(pane_height, round(box_norm[3] * pane_height)))
+    return CropBox(left, top, right, bottom)
+
+
 def compute_visual_metrics(left_img: Image.Image, right_img: Image.Image) -> dict[str, Any]:
     if left_img.size != right_img.size:
         raise ValueError(f"image sizes differ: {left_img.size} vs {right_img.size}")
@@ -116,7 +150,16 @@ def compute_visual_metrics(left_img: Image.Image, right_img: Image.Image) -> dic
     }
 
 
-def save_visual_outputs(full_png: Path, left_png: Path, right_png: Path, diff_png: Path, toolbar_height: int, bottom_trim: int) -> dict[str, Any]:
+def save_visual_outputs(
+    full_png: Path,
+    left_png: Path,
+    right_png: Path,
+    diff_png: Path,
+    toolbar_height: int,
+    bottom_trim: int,
+    hotspots: list[HotspotSpec],
+    output_dir: Path,
+) -> dict[str, Any]:
     image = Image.open(full_png).convert("RGBA")
     left_box, right_box = build_crop_boxes(image.width, image.height, toolbar_height, bottom_trim)
     left = image.crop(left_box.as_tuple())
@@ -131,9 +174,49 @@ def save_visual_outputs(full_png: Path, left_png: Path, right_png: Path, diff_pn
 
     metrics["full_crop_left"] = list(left_box.as_tuple())
     metrics["full_crop_right"] = list(right_box.as_tuple())
+    metrics["hotspots"] = save_hotspot_outputs(left, right, hotspots, output_dir)
     return metrics
 
 
+def save_hotspot_outputs(
+    left_img: Image.Image,
+    right_img: Image.Image,
+    hotspots: list[HotspotSpec],
+    output_dir: Path,
+) -> list[dict[str, Any]]:
+    hotspot_dir = output_dir / "hotspots"
+    hotspot_dir.mkdir(parents=True, exist_ok=True)
+
+    results: list[dict[str, Any]] = []
+    for hotspot in hotspots:
+        box = normalized_box_to_pixels(hotspot.pane_box_norm, left_img.width, left_img.height)
+        left_crop = left_img.crop(box.as_tuple())
+        right_crop = right_img.crop(box.as_tuple())
+        metrics = compute_visual_metrics(left_crop, right_crop)
+        diff_img = metrics.pop("diff_image")
+        diff_boost = diff_img.convert("RGB").point(lambda value: min(255, value * 4))
+
+        left_path = hotspot_dir / f"{hotspot.id}_left.png"
+        right_path = hotspot_dir / f"{hotspot.id}_right.png"
+        diff_path = hotspot_dir / f"{hotspot.id}_diff.png"
+        left_crop.save(left_path)
+        right_crop.save(right_path)
+        diff_boost.save(diff_path)
+
+        metrics["id"] = hotspot.id
+        metrics["label"] = hotspot.label
+        metrics["notes"] = hotspot.notes
+        metrics["backend_focus"] = list(hotspot.backend_focus)
+        metrics["pane_box_norm"] = list(hotspot.pane_box_norm)
+        metrics["pane_box_pixels"] = list(box.as_tuple())
+        metrics["left_image"] = str(left_path)
+        metrics["right_image"] = str(right_path)
+        metrics["diff_image"] = str(diff_path)
+        results.append(metrics)
+
+    return sorted(results, key=lambda item: item["changed_ratio"], reverse=True)
+
+
 def load_backend_summary(report_json_path: Path) -> dict[str, Any]:
     data = json.loads(report_json_path.read_text())
 
@@ -200,6 +283,32 @@ def write_reports(
         f"- `{output_dir / 'compare_right.png'}`",
         f"- `{output_dir / 'compare_diff.png'}`",
         "",
+        "## Hotspot AOI Audit",
+        "",
+    ]
+
+    for hotspot in visual_metrics.get("hotspots", []):
+        lines.extend(
+            [
+                f"### {hotspot['label']}",
+                "",
+                f"- id: `{hotspot['id']}`",
+                f"- notes: `{hotspot['notes']}`",
+                f"- backend focus: `{hotspot['backend_focus']}`",
+                f"- changed pixels: `{hotspot['changed_pixels']}` / `{hotspot['total_pixels']}`",
+                f"- changed ratio: `{hotspot['changed_ratio']}`",
+                f"- mean abs rgb: `{hotspot['mean_abs_rgb']}`",
+                f"- pane box norm: `{hotspot['pane_box_norm']}`",
+                f"- pane box pixels: `{hotspot['pane_box_pixels']}`",
+                f"- left image: `{hotspot['left_image']}`",
+                f"- right image: `{hotspot['right_image']}`",
+                f"- diff image: `{hotspot['diff_image']}`",
+                "",
+            ]
+        )
+
+    lines.extend(
+        [
         "## Backend Render Audit",
         "",
         f"- original feature instances: `{backend_summary['original_feature_instances']}`",
@@ -208,7 +317,8 @@ def write_reports(
         "",
         "Status counts:",
         "",
-    ]
+        ]
+    )
     for key, value in backend_summary["status_counts"].items():
         lines.append(f"- `{key}`: `{value}`")
 
@@ -238,6 +348,7 @@ def main() -> None:
     args.output_dir.mkdir(parents=True, exist_ok=True)
 
     compare_version = fetch_compare_version(args.compare_url)
+    hotspots = load_hotspots(args.hotspots_json)
     full_png = args.output_dir / "compare_full.png"
     left_png = args.output_dir / "compare_left.png"
     right_png = args.output_dir / "compare_right.png"
@@ -251,6 +362,8 @@ def main() -> None:
         diff_png=diff_png,
         toolbar_height=args.toolbar_height,
         bottom_trim=args.bottom_trim,
+        hotspots=hotspots,
+        output_dir=args.output_dir,
     )
     backend_summary = load_backend_summary(args.backend_audit_json)
     report_md, report_json = write_reports(
@@ -270,6 +383,13 @@ def main() -> None:
                 "report_json": str(report_json),
                 "changed_ratio": visual_metrics["changed_ratio"],
                 "changed_pixels": visual_metrics["changed_pixels"],
+                "hotspots": [
+                    {
+                        "id": item["id"],
+                        "changed_ratio": item["changed_ratio"],
+                    }
+                    for item in visual_metrics.get("hotspots", [])
+                ],
             },
             ensure_ascii=False,
             indent=2,

report/strict_audit/strict_audit_summary.json

@@ -3,38 +3,222 @@
   "compare_version": "20nm-r7-20260331-2044",
   "backend_audit_json": "/root/sourceserver/pbf/NavSea_Original_vs_Delivery_Render_Audit_Karatsu_20nm_2026-03-31.r7.json",
   "visual_metrics": {
-    "image_width": 800,
-    "image_height": 580,
-    "total_pixels": 464000,
-    "changed_pixels": 411961,
-    "changed_ratio": 0.887847,
+    "image_width": 640,
+    "image_height": 400,
+    "total_pixels": 256000,
+    "changed_pixels": 230361,
+    "changed_ratio": 0.899848,
     "mean_abs_rgb": [
-      30.3034,
-      31.6079,
-      61.2516
+      27.394,
+      28.0012,
+      51.399
     ],
     "rms_rgb": [
-      45.7879,
-      45.5806,
-      75.4396
+      42.1614,
+      40.8117,
+      66.9404
     ],
     "diff_bbox": [
       0,
       0,
-      800,
-      580
+      640,
+      400
     ],
     "full_crop_left": [
       0,
       150,
-      800,
-      730
+      640,
+      550
     ],
     "full_crop_right": [
-      800,
+      640,
       150,
-      1600,
-      730
+      1280,
+      550
+    ],
+    "hotspots": [
+      {
+        "image_width": 90,
+        "image_height": 120,
+        "total_pixels": 10800,
+        "changed_pixels": 10501,
+        "changed_ratio": 0.972315,
+        "mean_abs_rgb": [
+          35.1766,
+          36.7016,
+          83.6827
+        ],
+        "rms_rgb": [
+          43.2452,
+          44.0282,
+          90.1318
+        ],
+        "diff_bbox": [
+          0,
+          0,
+          90,
+          120
+        ],
+        "id": "southwest_lighthouse_cluster",
+        "label": "西南灯塔区",
+        "notes": "左下角远处灯塔与标记点，用来校验远处 symbol 表现。",
+        "backend_focus": [
+          "p航路標識群",
+          "p陸上構造物"
+        ],
+        "pane_box_norm": [
+          0.0,
+          0.7,
+          0.14,
+          1.0
+        ],
+        "pane_box_pixels": [
+          0,
+          280,
+          90,
+          400
+        ],
+        "left_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/southwest_lighthouse_cluster_left.png",
+        "right_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/southwest_lighthouse_cluster_right.png",
+        "diff_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/southwest_lighthouse_cluster_diff.png"
+      },
+      {
+        "image_width": 147,
+        "image_height": 80,
+        "total_pixels": 11760,
+        "changed_pixels": 9217,
+        "changed_ratio": 0.783759,
+        "mean_abs_rgb": [
+          25.8832,
+          26.3819,
+          35.8165
+        ],
+        "rms_rgb": [
+          40.7513,
+          43.6982,
+          55.4931
+        ],
+        "diff_bbox": [
+          0,
+          0,
+          147,
+          80
+        ],
+        "id": "takashima_main_harbor_marks",
+        "label": "高岛主港航标区",
+        "notes": "主港口灯塔、红绿标识、近岸障碍标记。",
+        "backend_focus": [
+          "p航路標識群",
+          "safety_icon_missing",
+          "text_missing_in_engineering"
+        ],
+        "pane_box_norm": [
+          0.34,
+          0.05,
+          0.57,
+          0.25
+        ],
+        "pane_box_pixels": [
+          218,
+          20,
+          365,
+          100
+        ],
+        "left_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_main_harbor_marks_left.png",
+        "right_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_main_harbor_marks_right.png",
+        "diff_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_main_harbor_marks_diff.png"
+      },
+      {
+        "image_width": 115,
+        "image_height": 68,
+        "total_pixels": 7820,
+        "changed_pixels": 5820,
+        "changed_ratio": 0.744246,
+        "mean_abs_rgb": [
+          26.0925,
+          28.3926,
+          32.3252
+        ],
+        "rms_rgb": [
+          40.8552,
+          45.3891,
+          51.1523
+        ],
+        "diff_bbox": [
+          0,
+          0,
+          115,
+          68
+        ],
+        "id": "takashima_inner_nearshore_hazards",
+        "label": "高岛近岸碍航与鱼礁区",
+        "notes": "近岸鱼礁、碍航点、灯塔与小灯混合区。",
+        "backend_focus": [
+          "p投錨注意障害物",
+          "p航行危険障害物",
+          "p航路標識群"
+        ],
+        "pane_box_norm": [
+          0.44,
+          0.14,
+          0.62,
+          0.31
+        ],
+        "pane_box_pixels": [
+          282,
+          56,
+          397,
+          124
+        ],
+        "left_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_inner_nearshore_hazards_left.png",
+        "right_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_inner_nearshore_hazards_right.png",
+        "diff_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_inner_nearshore_hazards_diff.png"
+      },
+      {
+        "image_width": 109,
+        "image_height": 64,
+        "total_pixels": 6976,
+        "changed_pixels": 4310,
+        "changed_ratio": 0.617833,
+        "mean_abs_rgb": [
+          14.5257,
+          14.9903,
+          20.7008
+        ],
+        "rms_rgb": [
+          30.1275,
+          32.1947,
+          39.6306
+        ],
+        "diff_bbox": [
+          0,
+          4,
+          109,
+          64
+        ],
+        "id": "east_breakwater_marks",
+        "label": "东侧防波堤灯台区",
+        "notes": "右上沿岸的防波堤灯台与港口标记。",
+        "backend_focus": [
+          "p航路標識群",
+          "safety_icon_missing"
+        ],
+        "pane_box_norm": [
+          0.83,
+          0.0,
+          1.0,
+          0.16
+        ],
+        "pane_box_pixels": [
+          531,
+          0,
+          640,
+          64
+        ],
+        "left_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/east_breakwater_marks_left.png",
+        "right_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/east_breakwater_marks_right.png",
+        "diff_image": "/root/sourceserver/pbf/report/strict_audit/hotspots/east_breakwater_marks_diff.png"
+      }
     ]
   },
   "backend_summary": {

report/strict_audit/strict_audit_summary.md

@@ -8,12 +8,12 @@
 
 ## Visual Audit
 
-- changed pixels: `411961` / `464000`
-- changed ratio: `0.887847`
-- mean abs rgb: `[30.3034, 31.6079, 61.2516]`
-- rms rgb: `[45.7879, 45.5806, 75.4396]`
-- left crop: `[0, 150, 800, 730]`
-- right crop: `[800, 150, 1600, 730]`
+- changed pixels: `230361` / `256000`
+- changed ratio: `0.899848`
+- mean abs rgb: `[27.394, 28.0012, 51.399]`
+- rms rgb: `[42.1614, 40.8117, 66.9404]`
+- left crop: `[0, 150, 640, 550]`
+- right crop: `[640, 150, 1280, 550]`
 
 Artifacts:
 
@@ -22,6 +22,64 @@ Artifacts:
 - `/root/sourceserver/pbf/report/strict_audit/compare_right.png`
 - `/root/sourceserver/pbf/report/strict_audit/compare_diff.png`
 
+## Hotspot AOI Audit
+
+### 西南灯塔区
+
+- id: `southwest_lighthouse_cluster`
+- notes: `左下角远处灯塔与标记点，用来校验远处 symbol 表现。`
+- backend focus: `['p航路標識群', 'p陸上構造物']`
+- changed pixels: `10501` / `10800`
+- changed ratio: `0.972315`
+- mean abs rgb: `[35.1766, 36.7016, 83.6827]`
+- pane box norm: `[0.0, 0.7, 0.14, 1.0]`
+- pane box pixels: `[0, 280, 90, 400]`
+- left image: `/root/sourceserver/pbf/report/strict_audit/hotspots/southwest_lighthouse_cluster_left.png`
+- right image: `/root/sourceserver/pbf/report/strict_audit/hotspots/southwest_lighthouse_cluster_right.png`
+- diff image: `/root/sourceserver/pbf/report/strict_audit/hotspots/southwest_lighthouse_cluster_diff.png`
+
+### 高岛主港航标区
+
+- id: `takashima_main_harbor_marks`
+- notes: `主港口灯塔、红绿标识、近岸障碍标记。`
+- backend focus: `['p航路標識群', 'safety_icon_missing', 'text_missing_in_engineering']`
+- changed pixels: `9217` / `11760`
+- changed ratio: `0.783759`
+- mean abs rgb: `[25.8832, 26.3819, 35.8165]`
+- pane box norm: `[0.34, 0.05, 0.57, 0.25]`
+- pane box pixels: `[218, 20, 365, 100]`
+- left image: `/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_main_harbor_marks_left.png`
+- right image: `/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_main_harbor_marks_right.png`
+- diff image: `/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_main_harbor_marks_diff.png`
+
+### 高岛近岸碍航与鱼礁区
+
+- id: `takashima_inner_nearshore_hazards`
+- notes: `近岸鱼礁、碍航点、灯塔与小灯混合区。`
+- backend focus: `['p投錨注意障害物', 'p航行危険障害物', 'p航路標識群']`
+- changed pixels: `5820` / `7820`
+- changed ratio: `0.744246`
+- mean abs rgb: `[26.0925, 28.3926, 32.3252]`
+- pane box norm: `[0.44, 0.14, 0.62, 0.31]`
+- pane box pixels: `[282, 56, 397, 124]`
+- left image: `/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_inner_nearshore_hazards_left.png`
+- right image: `/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_inner_nearshore_hazards_right.png`
+- diff image: `/root/sourceserver/pbf/report/strict_audit/hotspots/takashima_inner_nearshore_hazards_diff.png`
+
+### 东侧防波堤灯台区
+
+- id: `east_breakwater_marks`
+- notes: `右上沿岸的防波堤灯台与港口标记。`
+- backend focus: `['p航路標識群', 'safety_icon_missing']`
+- changed pixels: `4310` / `6976`
+- changed ratio: `0.617833`
+- mean abs rgb: `[14.5257, 14.9903, 20.7008]`
+- pane box norm: `[0.83, 0.0, 1.0, 0.16]`
+- pane box pixels: `[531, 0, 640, 64]`
+- left image: `/root/sourceserver/pbf/report/strict_audit/hotspots/east_breakwater_marks_left.png`
+- right image: `/root/sourceserver/pbf/report/strict_audit/hotspots/east_breakwater_marks_right.png`
+- diff image: `/root/sourceserver/pbf/report/strict_audit/hotspots/east_breakwater_marks_diff.png`
+
 ## Backend Render Audit
 
 - original feature instances: `258317`

strict_audit_hotspots_20nm.json

@@ -0,0 +1,44 @@
+[
+  {
+    "id": "takashima_main_harbor_marks",
+    "label": "高岛主港航标区",
+    "notes": "主港口灯塔、红绿标识、近岸障碍标记。",
+    "pane_box_norm": [0.34, 0.05, 0.57, 0.25],
+    "backend_focus": [
+      "p航路標識群",
+      "safety_icon_missing",
+      "text_missing_in_engineering"
+    ]
+  },
+  {
+    "id": "takashima_inner_nearshore_hazards",
+    "label": "高岛近岸碍航与鱼礁区",
+    "notes": "近岸鱼礁、碍航点、灯塔与小灯混合区。",
+    "pane_box_norm": [0.44, 0.14, 0.62, 0.31],
+    "backend_focus": [
+      "p投錨注意障害物",
+      "p航行危険障害物",
+      "p航路標識群"
+    ]
+  },
+  {
+    "id": "east_breakwater_marks",
+    "label": "东侧防波堤灯台区",
+    "notes": "右上沿岸的防波堤灯台与港口标记。",
+    "pane_box_norm": [0.83, 0.0, 1.0, 0.16],
+    "backend_focus": [
+      "p航路標識群",
+      "safety_icon_missing"
+    ]
+  },
+  {
+    "id": "southwest_lighthouse_cluster",
+    "label": "西南灯塔区",
+    "notes": "左下角远处灯塔与标记点，用来校验远处 symbol 表现。",
+    "pane_box_norm": [0.0, 0.70, 0.14, 1.0],
+    "backend_focus": [
+      "p航路標識群",
+      "p陸上構造物"
+    ]
+  }
+]