feat(web): pannello diagnostica match (CC) con hint contestuali

MatchResp ora include diag dict (CC feature). UI rendering:

- Nuovo pannello pieghevole "🔍 Diagnostica" sotto i tempi
- Per ogni match mostra:
  * pipeline pruning (vars total → top_eval → top_pass → full_eval)
  * candidati (raw → pre_nms → final)
  * drop reasons (NCC, score, recall, bbox, NMS) con counter
  * soglie effettive applicate
  * flag attivi (polarity, soft, subpix-LM)

- Quando 0 match → pannello si apre automaticamente + mostra hint
  contestuale specifico:
  * "0 candidati top" → suggerisce ↓ min_score / top_thresh
  * "tutti dropped da NCC" → ↓ verify_threshold (filtro_fp)
  * "score post-NCC sotto" → ↓ min_score
  * "recall basso" → ↓ min_recall
  * "bbox out-of-scene" → check pose / search_roi

Risolve il pattern "0 match perche'?" con guida actionable invece
del black-box. Tutti e 3 endpoint match (/match, /match_simple,
/match_recipe) propagano il diag.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

pm2d/eval.py

@@ -0,0 +1,217 @@
+"""CLI validation harness per LineShapeMatcher.
+
+Usage:
+    python -m pm2d.eval dataset.json [opzioni]
+
+Formato dataset (JSON):
+    {
+      "template": "path/to/template.png",
+      "mask": "path/to/mask.png",  # opzionale
+      "params": {                   # opzionali, override su matcher init
+        "use_polarity": true,
+        "angle_step_deg": 5,
+        ...
+      },
+      "find_params": {              # opzionali, passati a find()
+        "min_score": 0.6,
+        "use_soft_score": true,
+        ...
+      },
+      "scenes": [
+        {
+          "image": "path/to/scene1.png",
+          "ground_truth": [
+            {"cx": 320.0, "cy": 240.0, "angle_deg": 12.0,
+             "scale": 1.0, "tolerance_px": 5.0,
+             "tolerance_deg": 3.0}
+          ]
+        }
+      ]
+    }
+
+Output: report precision/recall/IoU/timing per ogni scena + aggregati.
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import math
+import sys
+import time
+from pathlib import Path
+
+import cv2
+import numpy as np
+
+from pm2d.line_matcher import LineShapeMatcher, _poly_iou, _oriented_bbox_polygon
+
+
+def _load_image(path: str | Path) -> np.ndarray:
+    img = cv2.imread(str(path), cv2.IMREAD_UNCHANGED)
+    if img is None:
+        raise FileNotFoundError(f"Immagine non trovata: {path}")
+    if img.ndim == 2:
+        img = cv2.cvtColor(img, cv2.COLOR_GRAY2BGR)
+    return img
+
+
+def _gt_to_poly(gt: dict, tw: int, th: int) -> np.ndarray:
+    """Costruisce bbox poligonale per un ground truth."""
+    s = float(gt.get("scale", 1.0))
+    return _oriented_bbox_polygon(
+        float(gt["cx"]), float(gt["cy"]),
+        tw * s, th * s, float(gt["angle_deg"]),
+    )
+
+
+def _match_to_gt(match, gt: dict, tw: int, th: int,
+                 iou_thr: float = 0.3) -> bool:
+    """True se il match corrisponde al ground truth.
+
+    Criterio: distanza centro <= tolerance_px AND |angle_deg - gt| <= tolerance_deg
+    OR IoU bbox >= iou_thr (fallback per pose con tolerance ampie).
+    """
+    tol_px = float(gt.get("tolerance_px", 5.0))
+    tol_deg = float(gt.get("tolerance_deg", 3.0))
+    dx = match.cx - float(gt["cx"])
+    dy = match.cy - float(gt["cy"])
+    dist = math.hypot(dx, dy)
+    da = abs((match.angle_deg - float(gt["angle_deg"]) + 180) % 360 - 180)
+    if dist <= tol_px and da <= tol_deg:
+        return True
+    # Fallback IoU
+    poly_gt = _gt_to_poly(gt, tw, th)
+    poly_m = match.bbox_poly
+    if _poly_iou(poly_m, poly_gt) >= iou_thr:
+        return True
+    return False
+
+
+def evaluate_scene(matcher: LineShapeMatcher, scene_bgr: np.ndarray,
+                   gt_list: list[dict], find_params: dict,
+                   tw: int, th: int) -> dict:
+    """Esegue match e calcola TP/FP/FN per una scena."""
+    t0 = time.time()
+    matches = matcher.find(scene_bgr, **find_params)
+    elapsed = time.time() - t0
+
+    gt_matched = [False] * len(gt_list)
+    match_is_tp = [False] * len(matches)
+    iou_per_match = [0.0] * len(matches)
+    for i, m in enumerate(matches):
+        for j, gt in enumerate(gt_list):
+            if gt_matched[j]:
+                continue
+            if _match_to_gt(m, gt, tw, th):
+                gt_matched[j] = True
+                match_is_tp[i] = True
+                # Calcolo IoU per metrica
+                poly_gt = _gt_to_poly(gt, tw, th)
+                iou_per_match[i] = _poly_iou(m.bbox_poly, poly_gt)
+                break
+    tp = sum(match_is_tp)
+    fp = len(matches) - tp
+    fn = len(gt_list) - sum(gt_matched)
+    return {
+        "n_matches": len(matches),
+        "n_gt": len(gt_list),
+        "tp": tp, "fp": fp, "fn": fn,
+        "find_time_s": elapsed,
+        "iou_mean": float(np.mean([i for i, t in zip(iou_per_match, match_is_tp) if t])
+                          if tp > 0 else 0.0),
+        "diag": (matcher.get_last_diag()
+                 if hasattr(matcher, "get_last_diag") else None),
+    }
+
+
+def run(dataset_path: str, scene_filter: str | None = None,
+        verbose: bool = False) -> dict:
+    """Esegue eval su dataset, ritorna report aggregato."""
+    dataset_path = Path(dataset_path)
+    base = dataset_path.parent
+    with open(dataset_path) as f:
+        ds = json.load(f)
+
+    template = _load_image(base / ds["template"])
+    mask = None
+    if ds.get("mask"):
+        mask_img = cv2.imread(str(base / ds["mask"]), cv2.IMREAD_GRAYSCALE)
+        if mask_img is not None:
+            mask = (mask_img > 128).astype(np.uint8) * 255
+    init_params = ds.get("params", {})
+    find_params = ds.get("find_params", {})
+
+    matcher = LineShapeMatcher(**init_params)
+    n_var = matcher.train(template, mask=mask)
+    tw, th = matcher.template_size
+    print(f"Template: {ds['template']} ({tw}x{th}), {n_var} varianti")
+    print(f"Param matcher: {init_params}")
+    print(f"Param find:    {find_params}")
+    print()
+
+    scenes = ds["scenes"]
+    if scene_filter:
+        scenes = [s for s in scenes if scene_filter in s["image"]]
+
+    rows = []
+    tot_tp = tot_fp = tot_fn = 0
+    tot_time = 0.0
+    for sc in scenes:
+        scene = _load_image(base / sc["image"])
+        gt = sc.get("ground_truth", [])
+        result = evaluate_scene(matcher, scene, gt, find_params, tw, th)
+        rows.append({"scene": sc["image"], **result})
+        tot_tp += result["tp"]; tot_fp += result["fp"]; tot_fn += result["fn"]
+        tot_time += result["find_time_s"]
+        prec = result["tp"] / max(1, result["tp"] + result["fp"])
+        rec = result["tp"] / max(1, result["tp"] + result["fn"])
+        line = (f"  {sc['image']:30s}  "
+                f"TP={result['tp']} FP={result['fp']} FN={result['fn']}  "
+                f"P={prec:.2f} R={rec:.2f}  "
+                f"IoU={result['iou_mean']:.2f}  "
+                f"t={result['find_time_s']*1000:.0f}ms")
+        print(line)
+        if verbose and result["diag"] and hasattr(matcher, "_format_diag"):
+            print(f"     diag: {matcher._format_diag(result['diag'])}")
+
+    # Aggregati
+    precision = tot_tp / max(1, tot_tp + tot_fp)
+    recall = tot_tp / max(1, tot_tp + tot_fn)
+    f1 = 2 * precision * recall / max(1e-9, precision + recall)
+    print()
+    print(f"AGGREGATO: precision={precision:.3f} recall={recall:.3f} "
+          f"F1={f1:.3f}  TP={tot_tp} FP={tot_fp} FN={tot_fn}")
+    print(f"TIME: total={tot_time:.2f}s avg={tot_time / max(1, len(scenes)) * 1000:.0f}ms/scene")
+
+    return {
+        "precision": precision, "recall": recall, "f1": f1,
+        "tp": tot_tp, "fp": tot_fp, "fn": tot_fn,
+        "total_time_s": tot_time, "n_scenes": len(scenes),
+        "per_scene": rows,
+    }
+
+
+def main(argv: list[str] | None = None) -> int:
+    p = argparse.ArgumentParser(
+        description="pm2d-eval: validation harness per LineShapeMatcher"
+    )
+    p.add_argument("dataset", help="JSON dataset (template + scenes + GT)")
+    p.add_argument("--scene-filter", default=None,
+                   help="Filtro substring sui nomi scena (debug)")
+    p.add_argument("--verbose", "-v", action="store_true",
+                   help="Stampa diag dict per ogni scena")
+    p.add_argument("--out", default=None,
+                   help="Salva report JSON su file")
+    args = p.parse_args(argv)
+    report = run(args.dataset, scene_filter=args.scene_filter,
+                 verbose=args.verbose)
+    if args.out:
+        with open(args.out, "w") as f:
+            json.dump(report, f, indent=2)
+        print(f"Report salvato: {args.out}")
+    return 0 if report["f1"] > 0.5 else 1
+
+
+if __name__ == "__main__":
+    sys.exit(main())

pm2d/line_matcher.py

@@ -1356,6 +1356,7 @@ class LineShapeMatcher:
         min_recall: float = 0.0,
         use_soft_score: bool = False,
         subpixel_lm: bool = False,
+        debug: bool = False,
     ) -> list[Match]:
         """
         scale_penalty: se > 0, riduce lo score per match a scala diversa da 1.0:
@@ -1373,6 +1374,32 @@ class LineShapeMatcher:
         if not self.variants:
             raise RuntimeError("Matcher non addestrato: chiamare train() prima.")
 
+        # Diagnostic counter: traccia perche' candidati sono droppati lungo
+        # la pipeline. Esposto via get_last_diag() o ritornato implicitamente
+        # se debug=True (vedi sotto).
+        diag = {
+            "n_variants_total": len(self.variants),
+            "n_variants_top_evaluated": 0,
+            "n_variants_top_passed": 0,
+            "n_variants_full_evaluated": 0,
+            "n_raw_candidates": 0,
+            "n_after_pre_nms": 0,
+            "drop_ncc_low": 0,
+            "drop_min_score_post_avg": 0,
+            "drop_recall_low": 0,
+            "drop_bbox_out_of_scene": 0,
+            "drop_nms_iou": 0,
+            "n_final": 0,
+            "top_thresh_used": 0.0,
+            "verify_threshold_used": float(verify_threshold),
+            "min_score_used": float(min_score),
+            "min_recall_used": float(min_recall),
+            "use_polarity": bool(self.use_polarity),
+            "use_soft_score": bool(use_soft_score),
+            "subpixel_lm": bool(subpixel_lm),
+        }
+        self._last_diag = diag
+
         gray_full = self._to_gray(scene_bgr)
         # Applica ROI di ricerca: restringe scena a crop, ricorda offset per
         # ri-traslare le coordinate dei match a fine pipeline.
@@ -1428,6 +1455,7 @@ class LineShapeMatcher:
             top_factor = max(top_factor, 0.7)
             cf_eff = 1
         top_thresh = min_score * top_factor
+        diag["top_thresh_used"] = float(top_thresh)
 
         tw, th = self.template_size
         # density_top gia' computato sopra (cache o miss)
@@ -1513,6 +1541,7 @@ class LineShapeMatcher:
 
         kept_coarse: list[tuple[int, float]] = []
         all_top_scores: list[tuple[int, float]] = []
+        diag["n_variants_top_evaluated"] = len(coarse_idx_list)
         # batch_top: usa kernel batch single-call con prange-esterno su
         # varianti. Vince su threadpool quando n_vars >> n_threads e quando
         # H*W top e' piccolo (overhead chiamate JIT > costo kernel).
@@ -1576,6 +1605,8 @@ class LineShapeMatcher:
         kept_variants.sort(key=lambda t: -t[1])
         max_vars_full = max(max_matches * 8, len(self.variants) // 2)
         kept_variants = kept_variants[:max_vars_full]
+        diag["n_variants_top_passed"] = len(kept_coarse)
+        diag["n_variants_full_evaluated"] = len(kept_variants)
 
         # Full-res (parallelizzato) con bitmap.
         # Riusa cache se disponibile, altrimenti computa e salva.
@@ -1669,6 +1700,7 @@ class LineShapeMatcher:
                 raw.append((float(vals[i]), int(xs[i]), int(ys[i]), vi))
 
         raw.sort(key=lambda c: -c[0])
+        diag["n_raw_candidates"] = len(raw)
 
         # Mappa vi → score_map per subpixel/refinement
         score_maps = dict(candidates_per_var)
@@ -1700,6 +1732,7 @@ class LineShapeMatcher:
             preliminary_int.append((score, xi, yi, vi))
             if len(preliminary_int) >= pre_cap:
                 break
+        diag["n_after_pre_nms"] = len(preliminary_int)
 
         # Subpixel + refine + verify solo sui candidati pre-NMS (max pre_cap)
         kept: list[Match] = []
@@ -1746,6 +1779,7 @@ class LineShapeMatcher:
                     view_idx=getattr(var, "view_idx", 0),
                 )
                 if ncc < verify_threshold:
+                    diag["drop_ncc_low"] += 1
                     continue
                 score_f = (float(score_f) + max(0.0, ncc)) * 0.5
             # Soft-margin gradient similarity: sostituisce o integra lo
@@ -1760,6 +1794,7 @@ class LineShapeMatcher:
             # abbattere lo shape-score sotto la soglia user. Senza questo
             # check apparivano match con score < min_score (UI confusing).
             if float(score_f) < min_score:
+                diag["drop_min_score_post_avg"] += 1
                 continue
 
             # Feature recall (Halcon MinScore-style): conta quante feature
@@ -1771,6 +1806,7 @@ class LineShapeMatcher:
                     spread0, var, cx_f, cy_f, ang_f,
                 )
                 if recall < min_recall:
+                    diag["drop_recall_low"] += 1
                     continue
 
             # Ri-traslo coord da spazio crop ROI a spazio scena originale.
@@ -1794,6 +1830,7 @@ class LineShapeMatcher:
                 )
                 inside_ratio = float(inter) / poly_area
                 if inside_ratio < 0.75:
+                    diag["drop_bbox_out_of_scene"] += 1
                     continue
             # Penalità scala opzionale: score degrada con distanza da 1.0
             if scale_penalty > 0.0 and var.scale != 1.0:
@@ -1818,6 +1855,7 @@ class LineShapeMatcher:
                     dup = True
                     break
             if dup:
+                diag["drop_nms_iou"] += 1
                 continue
             kept.append(Match(
                 cx=cx_out, cy=cy_out,
@@ -1828,4 +1866,35 @@ class LineShapeMatcher:
             ))
             if len(kept) >= max_matches:
                 break
+        diag["n_final"] = len(kept)
+        if debug:
+            # Debug mode: stampa diagnostica su stderr per visibilita' immediata.
+            import sys as _sys
+            _sys.stderr.write(f"[pm2d.find debug] {self._format_diag(diag)}\n")
         return kept
+
+    def _format_diag(self, diag: dict) -> str:
+        """Formatta dict diagnostica in una linea leggibile."""
+        return (
+            f"vars: {diag['n_variants_total']} -> "
+            f"top_eval={diag['n_variants_top_evaluated']} "
+            f"top_pass={diag['n_variants_top_passed']} "
+            f"full_eval={diag['n_variants_full_evaluated']} | "
+            f"raw={diag['n_raw_candidates']} "
+            f"pre_nms={diag['n_after_pre_nms']} -> "
+            f"drop[ncc={diag['drop_ncc_low']}, "
+            f"score={diag['drop_min_score_post_avg']}, "
+            f"recall={diag['drop_recall_low']}, "
+            f"bbox={diag['drop_bbox_out_of_scene']}, "
+            f"nms={diag['drop_nms_iou']}] = "
+            f"final={diag['n_final']} (top_thresh={diag['top_thresh_used']:.2f})"
+        )
+
+    def get_last_diag(self) -> dict | None:
+        """Ritorna dict diagnostica dell'ultima chiamata find().
+
+        Halcon-equivalent: oggi inspect_shape_model espone parziali contatori.
+        Util per debug 'perche' 0 match', tuning interattivo, validation.
+        Vedi diag keys per significato (n_variants_top_evaluated, drop_*, ...).
+        """
+        return getattr(self, "_last_diag", None)

pm2d/web/server.py

@@ -217,6 +217,7 @@ class MatchResp(BaseModel):
     find_time: float
     num_variants: int
     annotated_id: str
+    diag: dict | None = None  # CC: diagnostica pipeline (drop reasons)
 
 
 class TuneParams(BaseModel):
@@ -521,6 +522,7 @@ def match(p: MatchParams):
         ) for m_ in matches],
         train_time=t_train, find_time=t_find,
         num_variants=n, annotated_id=ann_id,
+        diag=m.get_last_diag() if hasattr(m, "get_last_diag") else None,
     )
 
 
@@ -596,6 +598,7 @@ def match_simple(p: SimpleMatchParams):
         ) for mt in matches],
         train_time=t_train, find_time=t_find,
         num_variants=n, annotated_id=ann_id,
+        diag=m.get_last_diag() if hasattr(m, "get_last_diag") else None,
     )
 
 
@@ -769,6 +772,7 @@ def match_recipe(p: RecipeMatchParams):
         ) for mt in matches],
         train_time=0.0, find_time=t_find,
         num_variants=len(m.variants), annotated_id=ann_id,
+        diag=m.get_last_diag() if hasattr(m, "get_last_diag") else None,
     )
 
 

pm2d/web/static/app.js

@@ -336,6 +336,7 @@ async function doMatchRecipe() {
   document.getElementById("t-find").textContent = `${data.find_time.toFixed(2)}s`;
   document.getElementById("t-var").textContent = data.num_variants;
   document.getElementById("t-match").textContent = data.matches.length;
+  renderDiag(data.diag, data.matches.length);
   setStatus(`${data.matches.length} match trovati (ricetta ${state.active_recipe})`);
 }
 
@@ -409,6 +410,7 @@ async function doMatch() {
   document.getElementById("t-find").textContent = `${data.find_time.toFixed(2)}s`;
   document.getElementById("t-var").textContent = data.num_variants;
   document.getElementById("t-match").textContent = data.matches.length;
+  renderDiag(data.diag, data.matches.length);
   setStatus(`${data.matches.length} match trovati${hasAdv ? " (avanzato)" : ""}`);
 }
 
@@ -436,6 +438,61 @@ function setStatus(s) {
 }
 
 // ---------- Init ----------
+// ---------- CC: Diagnostica match ----------
+function renderDiag(diag, n_matches) {
+  const el = document.getElementById("diag-content");
+  if (!diag) {
+    el.innerHTML = '<em style="color:#888">Diagnostica non disponibile</em>';
+    return;
+  }
+  const dropTotal = (diag.drop_ncc_low || 0) + (diag.drop_min_score_post_avg || 0)
+    + (diag.drop_recall_low || 0) + (diag.drop_bbox_out_of_scene || 0)
+    + (diag.drop_nms_iou || 0);
+  // Hint contestuali se 0 match
+  let hint = "";
+  if (n_matches === 0) {
+    if (diag.n_after_pre_nms === 0) {
+      hint = `<div style="color:#f88; margin-top:6px">⚠ Nessun candidato sopra soglia.
+        Prova: ↓ <b>min_score</b> o ↓ <b>top_thresh</b> (currently ${diag.top_thresh_used.toFixed(2)})</div>`;
+    } else if (diag.drop_ncc_low > 0 && dropTotal === diag.drop_ncc_low) {
+      hint = `<div style="color:#f88; margin-top:6px">⚠ ${diag.drop_ncc_low} candidati droppati da NCC.
+        Prova: ↓ <b>verify_threshold</b> (filtro_fp più leggero)</div>`;
+    } else if (diag.drop_min_score_post_avg > 0) {
+      hint = `<div style="color:#f88; margin-top:6px">⚠ ${diag.drop_min_score_post_avg} match sotto min_score post-NCC.
+        Prova: ↓ <b>min_score</b></div>`;
+    } else if (diag.drop_recall_low > 0) {
+      hint = `<div style="color:#f88; margin-top:6px">⚠ ${diag.drop_recall_low} match con recall < ${diag.min_recall_used}.
+        Prova: ↓ <b>min_recall</b></div>`;
+    } else if (diag.drop_bbox_out_of_scene > 0) {
+      hint = `<div style="color:#f88; margin-top:6px">⚠ ${diag.drop_bbox_out_of_scene} match con bbox fuori scena.
+        Centro derivato male: aumenta <b>min_score</b> o restringi <b>search_roi</b></div>`;
+    }
+  }
+  const flags = [];
+  if (diag.use_polarity) flags.push("polarity");
+  if (diag.use_soft_score) flags.push("soft");
+  if (diag.subpixel_lm) flags.push("subpix-LM");
+  el.innerHTML = `
+    <div><b>Pipeline pruning:</b></div>
+    <div>varianti: ${diag.n_variants_total} → top_eval=${diag.n_variants_top_evaluated}
+       → top_pass=${diag.n_variants_top_passed} → full_eval=${diag.n_variants_full_evaluated}</div>
+    <div><b>Candidati:</b> raw=${diag.n_raw_candidates}
+       → pre_nms=${diag.n_after_pre_nms} → final=${diag.n_final}</div>
+    <div><b>Drop reasons:</b> NCC=${diag.drop_ncc_low}, score=${diag.drop_min_score_post_avg},
+       recall=${diag.drop_recall_low}, bbox=${diag.drop_bbox_out_of_scene}, NMS=${diag.drop_nms_iou}</div>
+    <div><b>Soglie:</b> top=${diag.top_thresh_used.toFixed(2)},
+       min_score=${diag.min_score_used.toFixed(2)},
+       NCC=${diag.verify_threshold_used.toFixed(2)},
+       recall=${diag.min_recall_used.toFixed(2)}</div>
+    ${flags.length ? `<div><b>Flag attivi:</b> ${flags.join(", ")}</div>` : ""}
+    ${hint}
+  `;
+  // Auto-apri pannello se 0 match (segnala problema)
+  if (n_matches === 0) {
+    document.getElementById("diag-panel").open = true;
+  }
+}
+
 // ---------- Auto-tune (Halcon-style) ----------
 async function doAutoTune() {
   if (!state.model || !state.roi) {

pm2d/web/static/index.html

@@ -214,6 +214,16 @@
     <div class="kv"><span>find:</span><span id="t-find">-</span></div>
     <div class="kv"><span>varianti:</span><span id="t-var">-</span></div>
     <div class="kv"><span>match:</span><span id="t-match">-</span></div>
+
+    <details id="diag-panel" style="margin-top:10px">
+      <summary>🔍 Diagnostica (CC)</summary>
+      <div id="diag-content" style="font-family:monospace; font-size:11px;
+                                     background:#1a1a1a; padding:8px;
+                                     border-radius:3px; margin-top:6px;
+                                     line-height:1.5">
+        <em style="color:#888">Esegui un MATCH per vedere la diagnostica</em>
+      </div>
+    </details>
   </section>
 </main>
 

pyproject.toml

@@ -12,6 +12,9 @@ dependencies = [
     "uvicorn[standard]>=0.34",
 ]
 
+[project.scripts]
+pm2d-eval = "pm2d.eval:main"
+
 [dependency-groups]
 dev = [
     "httpx>=0.28.1",