merge: UI pannello diagnostica

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>

.gitignore

@@ -8,3 +8,5 @@ __pycache__/
 .DS_Store
 *.log
 models/
+# Ricette pre-trained (generate da utente, non versionare)
+recipes/*.npz

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

@@ -512,8 +512,10 @@ class LineShapeMatcher:
         self.variants.clear()
         # Reset view list: template principale = view 0
         self._view_templates = [(gray.copy(), mask_full.copy())]
-        # Invalida cache feature di refine: il template e cambiato.
+        # Invalida cache: template/param cambiati → spread/feature obsoleti.
         self._refine_feat_cache = {}
+        if hasattr(self, "_scene_cache"):
+            self._scene_cache.clear()
         self._build_variants_for_view(gray, mask_full, view_idx=0)
         self._dedup_variants()
         return len(self.variants)
@@ -669,6 +671,51 @@ class LineShapeMatcher:
             raw[b] = d.astype(np.float32)
         return raw
 
+    # --- Scene precompute cache (II Halcon-style) -----------------------
+    _SCENE_CACHE_SIZE = 4
+
+    def _scene_cache_key(self, gray: np.ndarray) -> str | None:
+        """Hash compatto della scena + param che influenzano spread/density.
+
+        Hash su prime 64KB della scena (sufficiente discriminante per
+        scene fotografiche) + parametri matcher rilevanti. None se cache
+        disabilitata (es. scene troppo piccole).
+        """
+        if gray.size < 100:
+            return None
+        try:
+            import hashlib
+            h = hashlib.md5()
+            sample = gray.tobytes()[:65536]
+            h.update(sample)
+            h.update(f"|{gray.shape}|{gray.dtype}".encode())
+            h.update(
+                f"|{self.weak_grad}|{self.strong_grad}"
+                f"|{self.spread_radius}|{self._n_bins}"
+                f"|{self.pyramid_levels}".encode()
+            )
+            return h.hexdigest()
+        except Exception:
+            return None
+
+    def _scene_cache_get(self, key: str) -> tuple | None:
+        cache = getattr(self, "_scene_cache", None)
+        if cache is None:
+            return None
+        v = cache.get(key)
+        if v is not None:
+            cache.move_to_end(key)
+        return v
+
+    def _scene_cache_put(self, key: str, value: tuple) -> None:
+        from collections import OrderedDict
+        if not hasattr(self, "_scene_cache"):
+            self._scene_cache = OrderedDict()
+        self._scene_cache[key] = value
+        self._scene_cache.move_to_end(key)
+        while len(self._scene_cache) > self._SCENE_CACHE_SIZE:
+            self._scene_cache.popitem(last=False)
+
     def _spread_bitmap(self, gray: np.ndarray) -> np.ndarray:
         """Spread bitmap: bit b acceso dove bin b è presente nel raggio.
 
@@ -1309,6 +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:
@@ -1326,6 +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.
@@ -1340,18 +1414,31 @@ class LineShapeMatcher:
         else:
             gray0 = gray_full
             roi_offset = (0, 0)
+
+        # Cache pre-compute scena (II Halcon-style): hash bytes scene + param
+        # gradient/spread → riusa spread piramide + density tra find()
+        # consecutive con stessa scena (typical UI tuning: slider produce
+        # 10+ find() su scena identica). Risparmia ~80% del costo non-kernel.
+        cache_key = self._scene_cache_key(gray0)
+        cached = self._scene_cache_get(cache_key) if cache_key else None
+        if cached is not None:
+            grays, spread_top, bit_active_top, density_top, spread0, \
+                bit_active_full, density_full, top = cached
+        else:
             grays = [gray0]
             for _ in range(self.pyramid_levels - 1):
                 grays.append(cv2.pyrDown(grays[-1]))
             top = len(grays) - 1
-
-        # Spread bitmap (uint8) al top level: 32× meno memoria della response
-        # map float32 → MOLTO più cache-friendly per _score_by_shift.
             spread_top = self._spread_bitmap(grays[top])
             bit_active_top = int(
                 sum(1 << b for b in range(self._n_bins)
                     if (spread_top & (spread_top.dtype.type(1) << b)).any())
             )
+            density_top = _jit_popcount(spread_top)
+            # spread0 + density_full computati piu sotto, quindi salvo dopo.
+            spread0 = None
+            bit_active_full = None
+            density_full = None
         if nms_radius is None:
             nms_radius = max(8, min(self.template_size) // 2)
         # Pruning adattivo allo step angolare: con step piccolo (<= 3 deg)
@@ -1368,9 +1455,10 @@ 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 = _jit_popcount(spread_top)
+        # density_top gia' computato sopra (cache o miss)
         sf_top = 2 ** top
         bg_cache_top: dict[float, np.ndarray] = {}
         bg_cache_full: dict[float, np.ndarray] = {}
@@ -1453,6 +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).
@@ -1516,14 +1605,24 @@ 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
+        # Full-res (parallelizzato) con bitmap.
+        # Riusa cache se disponibile, altrimenti computa e salva.
+        if spread0 is None:
             spread0 = self._spread_bitmap(gray0)
             bit_active_full = int(
                 sum(1 << b for b in range(self._n_bins)
                     if (spread0 & (spread0.dtype.type(1) << b)).any())
             )
             density_full = _jit_popcount(spread0)
+            # Salva cache scena complete
+            if cache_key is not None:
+                self._scene_cache_put(cache_key, (
+                    grays, spread_top, bit_active_top, density_top,
+                    spread0, bit_active_full, density_full, top,
+                ))
         for sc in unique_scales:
             bg_cache_full[sc] = _bg_for_scale(density_full, sc, 1)
 
@@ -1601,6 +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)
@@ -1632,6 +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] = []
@@ -1678,6 +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
@@ -1692,6 +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
@@ -1703,6 +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.
@@ -1726,6 +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:
@@ -1750,6 +1855,7 @@ class LineShapeMatcher:
                     dup = True
                     break
             if dup:
+                diag["drop_nms_iou"] += 1
                 continue
             kept.append(Match(
                 cx=cx_out, cy=cy_out,
@@ -1760,4 +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,
     )
 
 
@@ -676,6 +679,103 @@ def list_recipes():
     return {"files": files, "dir": str(RECIPES_DIR)}
 
 
+# Cache di matcher caricati da .npz (V feature). Key: nome ricetta.
+_RECIPE_MATCHERS: OrderedDict = OrderedDict()
+_RECIPE_MATCHERS_SIZE = 4
+
+
+@app.post("/recipes/{name}/load")
+def load_recipe(name: str):
+    """Carica ricetta .npz e popola cache matcher in memoria.
+
+    Una volta caricata, /match_recipe la usa direttamente senza
+    re-train. Halcon-equivalent read_shape_model + handle.
+    """
+    safe_name = "".join(c for c in name if c.isalnum() or c in "._-")
+    if not safe_name.endswith(".npz"):
+        safe_name += ".npz"
+    path = RECIPES_DIR / safe_name
+    if not path.is_file():
+        raise HTTPException(404, f"Ricetta non trovata: {safe_name}")
+    m = LineShapeMatcher.load_model(str(path))
+    _RECIPE_MATCHERS[safe_name] = m
+    _RECIPE_MATCHERS.move_to_end(safe_name)
+    while len(_RECIPE_MATCHERS) > _RECIPE_MATCHERS_SIZE:
+        _RECIPE_MATCHERS.popitem(last=False)
+    return {
+        "name": safe_name,
+        "n_variants": len(m.variants),
+        "template_size": list(m.template_size),
+        "use_polarity": m.use_polarity,
+    }
+
+
+class RecipeMatchParams(BaseModel):
+    recipe: str
+    scene_id: str
+    # Solo find-time params (training gia' fatto offline)
+    min_score: float = 0.65
+    max_matches: int = 25
+    min_recall: float = 0.0
+    use_soft_score: bool = False
+    subpixel_lm: bool = False
+    nms_iou_threshold: float = 0.3
+    coarse_stride: int = 1
+    pyramid_propagate: bool = False
+    greediness: float = 0.0
+    refine_pose_joint: bool = False
+    search_roi: list[int] | None = None
+    verify_threshold: float = 0.5
+    scale_penalty: float = 0.0
+
+
+@app.post("/match_recipe", response_model=MatchResp)
+def match_recipe(p: RecipeMatchParams):
+    """Match con ricetta pre-trained: zero training, solo find."""
+    safe_name = p.recipe if p.recipe.endswith(".npz") else f"{p.recipe}.npz"
+    m = _RECIPE_MATCHERS.get(safe_name)
+    if m is None:
+        # Auto-load on demand
+        path = RECIPES_DIR / safe_name
+        if not path.is_file():
+            raise HTTPException(404, f"Ricetta non trovata: {safe_name}")
+        m = LineShapeMatcher.load_model(str(path))
+        _RECIPE_MATCHERS[safe_name] = m
+    scene = _load_image(p.scene_id)
+    if scene is None:
+        raise HTTPException(404, "Scena non trovata")
+    search_roi_t = tuple(p.search_roi) if p.search_roi else None
+    t0 = time.time()
+    matches = m.find(
+        scene,
+        min_score=p.min_score, max_matches=p.max_matches,
+        verify_threshold=p.verify_threshold,
+        scale_penalty=p.scale_penalty,
+        min_recall=p.min_recall,
+        use_soft_score=p.use_soft_score,
+        subpixel_lm=p.subpixel_lm,
+        nms_iou_threshold=p.nms_iou_threshold,
+        coarse_stride=p.coarse_stride,
+        pyramid_propagate=p.pyramid_propagate,
+        greediness=p.greediness,
+        refine_pose_joint=p.refine_pose_joint,
+        search_roi=search_roi_t,
+    )
+    t_find = time.time() - t0
+    tg = m.template_gray if m.template_gray is not None else np.zeros((1, 1), np.uint8)
+    annotated = _draw_matches(scene, matches, tg)
+    ann_id = _store_image(annotated)
+    return MatchResp(
+        matches=[MatchResult(
+            cx=mt.cx, cy=mt.cy, angle_deg=mt.angle_deg, scale=mt.scale,
+            score=mt.score, bbox_poly=mt.bbox_poly.tolist(),
+        ) 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,
+    )
+
+
 # Mount static
 app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")
 

pm2d/web/static/app.js

@@ -19,6 +19,7 @@ const PALETTE = [
 const state = {
   model: null, scene: null, roi: null, drag: null,
   matches: [], annotatedImg: null,
+  active_recipe: null,  // V: ricetta caricata (string nome) o null
 };
 
 // ---------- Forms ----------
@@ -307,7 +308,43 @@ function setupROI() {
 }
 
 // ---------- Match action ----------
+async function doMatchRecipe() {
+  if (!state.scene) { setStatus("Carica scena"); return; }
+  setStatus(`Match ricetta ${state.active_recipe}...`);
+  const hc = readHalconFlags();
+  const body = {
+    recipe: state.active_recipe,
+    scene_id: state.scene.id,
+    min_score: parseFloat(document.getElementById("p-min-score").value),
+    max_matches: parseInt(document.getElementById("p-max-matches").value, 10),
+    verify_threshold: 0.50,
+    ...hc,
+  };
+  const r = await fetch("/match_recipe", {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(body),
+  });
+  if (!r.ok) { setStatus(`Errore: ${await r.text()}`); return; }
+  const data = await r.json();
+  state.matches = data.matches;
+  state.annotatedImg = await loadImage(
+    `/image/${data.annotated_id}/raw?t=${Date.now()}`);
+  renderScene();
+  renderLegend();
+  document.getElementById("t-train").textContent = "—";
+  document.getElementById("t-find").textContent = `${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 ${state.active_recipe})`);
+}
+
 async function doMatch() {
+  // Path V: ricetta caricata → bypass training, solo find su scena
+  if (state.active_recipe) {
+    return doMatchRecipe();
+  }
   if (!state.model) { setStatus("Carica modello"); return; }
   if (!state.scene) { setStatus("Carica scena"); return; }
   if (!state.roi) { setStatus("Seleziona ROI sul modello"); return; }
@@ -373,6 +410,7 @@ async function doMatch() {
   document.getElementById("t-find").textContent = `${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)" : ""}`);
 }
 
@@ -400,6 +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) {
@@ -447,6 +540,57 @@ async function doAutoTune() {
   }
 }
 
+// ---------- V: Recipe load/list/unload ----------
+async function refreshRecipeList() {
+  try {
+    const r = await fetch("/recipes");
+    if (!r.ok) return;
+    const j = await r.json();
+    const sel = document.getElementById("hc-recipe-list");
+    const cur = sel.value;
+    sel.innerHTML = '<option value="">— ricette disponibili —</option>';
+    for (const f of j.files) {
+      const o = document.createElement("option");
+      o.value = f.name;
+      o.textContent = `${f.name}  (${(f.size / 1024).toFixed(1)} KB)`;
+      sel.appendChild(o);
+    }
+    if (cur) sel.value = cur;
+  } catch (e) { /* silent */ }
+}
+
+async function loadRecipe() {
+  const sel = document.getElementById("hc-recipe-list");
+  const name = sel.value;
+  if (!name) {
+    alert("Seleziona una ricetta dalla lista.");
+    return;
+  }
+  try {
+    const r = await fetch(`/recipes/${encodeURIComponent(name)}/load`, {
+      method: "POST",
+    });
+    if (!r.ok) throw new Error(await r.text());
+    const j = await r.json();
+    state.active_recipe = j.name;
+    document.getElementById("recipe-status").textContent =
+      `Caricata: ${j.name} — ${j.n_variants} varianti, ` +
+      `${j.template_size[0]}x${j.template_size[1]} px` +
+      (j.use_polarity ? " (polarity)" : "");
+    document.getElementById("recipe-status").style.color = "#0c0";
+    document.getElementById("btn-unload-recipe").disabled = false;
+  } catch (e) {
+    alert(`Errore caricamento: ${e.message}`);
+  }
+}
+
+function unloadRecipe() {
+  state.active_recipe = null;
+  document.getElementById("recipe-status").textContent = "Nessuna ricetta caricata";
+  document.getElementById("recipe-status").style.color = "#888";
+  document.getElementById("btn-unload-recipe").disabled = true;
+}
+
 // ---------- V: Save recipe ----------
 async function saveRecipe() {
   if (!state.model || !state.roi) {
@@ -480,6 +624,7 @@ async function saveRecipe() {
     if (!r.ok) throw new Error(await r.text());
     const j = await r.json();
     alert(`Ricetta salvata: ${j.name}\n${j.n_variants} varianti, ${j.size} bytes`);
+    refreshRecipeList();
   } catch (e) {
     alert(`Errore salvataggio: ${e.message}`);
   }
@@ -515,6 +660,11 @@ window.addEventListener("DOMContentLoaded", async () => {
   document.getElementById("btn-autotune").addEventListener("click", doAutoTune);
   document.getElementById("btn-save-recipe").addEventListener("click",
     saveRecipe);
+  document.getElementById("btn-load-recipe").addEventListener("click",
+    loadRecipe);
+  document.getElementById("btn-unload-recipe").addEventListener("click",
+    unloadRecipe);
+  refreshRecipeList();
   const slider = document.getElementById("p-min-score");
   slider.addEventListener("input", (e) => {
     document.getElementById("v-score").textContent =

pm2d/web/static/index.html

@@ -190,6 +190,16 @@
             <input type="text" id="hc-recipe-name" placeholder="nome_ricetta" style="flex:1">
             <button class="btn" id="btn-save-recipe" type="button">💾 Salva</button>
           </div>
+          <div style="display:flex; gap:6px; margin-top:6px; align-items:center">
+            <select id="hc-recipe-list" style="flex:1">
+              <option value="">— ricette disponibili —</option>
+            </select>
+            <button class="btn" id="btn-load-recipe" type="button">📂 Carica</button>
+            <button class="btn" id="btn-unload-recipe" type="button" disabled>✖ Stacca</button>
+          </div>
+          <div id="recipe-status" style="margin-top:4px; font-size:11px; color:#888">
+            Nessuna ricetta caricata
+          </div>
         </div>
       </div>
     </details>
@@ -204,6 +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",