237 lines
9.2 KiB
Python
237 lines
9.2 KiB
Python
"""未知菜品待学习：持久化存储与管理。"""
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import os
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import json
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import shutil
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import threading
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import datetime
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import numpy as np
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# 新未知图与库内已有 pending 特征相似度 ≥ 此值则不入待学习库
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PENDING_DEDUP_SIMILARITY = 0.90
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class PendingLearningStore:
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STATUS_PENDING = "pending"
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STATUS_LEARNED = "learned"
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STATUS_IGNORED = "ignored"
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def __init__(self, base_dir):
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self.base_dir = base_dir
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self.pending_dir = os.path.join(base_dir, "pending_images")
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self.data_file = os.path.join(base_dir, "pending_learning.json")
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self.lock = threading.Lock()
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self._items = []
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self._next_id = 1
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os.makedirs(self.pending_dir, exist_ok=True)
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self._load()
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def _load(self):
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if not os.path.exists(self.data_file):
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return
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try:
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with open(self.data_file, "r", encoding="utf-8") as f:
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data = json.load(f)
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self._items = data.get("items", [])
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self._next_id = data.get("next_id", 1)
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for item in self._items:
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if item.get("id") is None:
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continue
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self._next_id = max(self._next_id, item["id"] + 1)
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except Exception as e:
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print(f"加载待学习库失败: {e}")
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self._items = []
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self._next_id = 1
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def _save(self):
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try:
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with open(self.data_file, "w", encoding="utf-8") as f:
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json.dump({"next_id": self._next_id, "items": self._items}, f, ensure_ascii=False, indent=2)
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except Exception as e:
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print(f"保存待学习库失败: {e}")
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def _find_pending_by_path(self, image_path):
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norm = os.path.normcase(os.path.abspath(image_path))
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for item in self._items:
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if item.get("status") != self.STATUS_PENDING:
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continue
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stored = item.get("source_path") or item.get("image_path")
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if stored and os.path.normcase(os.path.abspath(stored)) == norm:
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return item
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return None
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def _is_similar_pending(self, feature, threshold=PENDING_DEDUP_SIMILARITY):
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"""若与任一 pending 特征相似度 ≥ threshold，返回 (item, sim)；否则 (None, 0)。"""
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feat = np.asarray(feature, dtype=np.float32).reshape(-1)
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best_item = None
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best_sim = 0.0
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for item in self._items:
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if item.get("status") != self.STATUS_PENDING:
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continue
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stored = item.get("feature")
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if stored is None:
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continue
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other = np.asarray(stored, dtype=np.float32).reshape(-1)
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if other.shape != feat.shape:
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continue
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sim = float(np.dot(feat, other))
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if sim >= threshold and sim >= best_sim:
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best_sim = sim
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best_item = item
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return best_item, best_sim
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def add(self, image_path, feature, suggested_category=None, score=None, reason=None):
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if not image_path or not os.path.exists(image_path):
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return None
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feature = np.asarray(feature, dtype=np.float32)
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new_sug = (suggested_category or "").strip()
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with self.lock:
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existing = self._find_pending_by_path(image_path)
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if existing:
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old_sug = (existing.get("suggested_category") or "").strip()
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# 同一路径但建议菜名已变：视为新的未知菜，不覆盖旧记录
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if old_sug and new_sug and old_sug != new_sug:
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existing = None
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else:
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existing["suggested_category"] = suggested_category or existing.get("suggested_category")
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existing["score"] = score if score is not None else existing.get("score")
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existing["feature"] = feature.tolist()
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existing["capture_time"] = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
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if reason:
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existing["reason"] = reason
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# 刷新图片副本，避免源文件被覆盖后内容过期
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try:
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dest = existing.get("image_path")
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if dest and dest.startswith(self.pending_dir):
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shutil.copy2(image_path, dest)
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except Exception:
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pass
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self._save()
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return existing["id"]
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# 与库内已有图相似度 ≥ 0.90 → 不加入待学习库
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similar, sim = self._is_similar_pending(feature, PENDING_DEDUP_SIMILARITY)
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if similar is not None:
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print(
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f"[pending] skip add (sim={sim:.3f}≥{PENDING_DEDUP_SIMILARITY:.2f} "
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f"vs #{similar.get('id')})"
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)
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return None
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pending_id = self._next_id
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self._next_id += 1
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stamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
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ext = os.path.splitext(image_path)[1] or ".jpeg"
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dest_name = f"pending_{stamp}_{pending_id}{ext}"
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dest_path = os.path.join(self.pending_dir, dest_name)
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try:
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shutil.copy2(image_path, dest_path)
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except Exception as e:
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print(f"复制待学习图片失败: {e}")
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dest_path = image_path
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item = {
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"id": pending_id,
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"image_path": dest_path,
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"source_path": image_path,
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"feature": feature.tolist(),
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"suggested_category": suggested_category,
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"score": float(score) if score is not None else None,
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"status": self.STATUS_PENDING,
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"capture_time": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
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"learned_category": None,
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"reason": reason,
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}
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self._items.append(item)
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self._save()
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return pending_id
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def get(self, pending_id):
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for item in self._items:
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if item.get("id") == pending_id:
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return item.copy()
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return None
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def get_list(self, status=STATUS_PENDING):
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rows = []
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for item in self._items:
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if item.get("status") != status:
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continue
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row = item.copy()
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feat = row.get("feature")
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if feat is not None:
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row["feature"] = np.array(feat, dtype=np.float32)
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rows.append(row)
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rows.sort(key=lambda x: x.get("capture_time", ""), reverse=True)
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return rows
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def count(self, status=STATUS_PENDING):
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return sum(1 for item in self._items if item.get("status") == status)
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def mark_learned(self, pending_id, category):
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with self.lock:
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for item in self._items:
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if item.get("id") == pending_id:
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item["status"] = self.STATUS_LEARNED
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item["learned_category"] = category
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item["learn_time"] = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
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self._save()
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return True
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return False
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def update_suggestion(self, pending_id, suggested_category=None, score=None):
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"""刷新仍待处理项的建议菜名 / 相似度（不改 status）。"""
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with self.lock:
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for item in self._items:
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if item.get("id") != pending_id:
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continue
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if item.get("status") != self.STATUS_PENDING:
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return False
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if suggested_category is not None:
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item["suggested_category"] = suggested_category
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if score is not None:
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item["score"] = float(score)
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self._save()
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return True
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return False
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def mark_ignored(self, pending_id):
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with self.lock:
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for item in self._items:
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if item.get("id") == pending_id:
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item["status"] = self.STATUS_IGNORED
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self._save()
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return True
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return False
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def delete(self, pending_id, remove_image=True):
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with self.lock:
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for idx, item in enumerate(self._items):
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if item.get("id") != pending_id:
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continue
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if remove_image:
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path = item.get("image_path")
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if path and os.path.exists(path) and path.startswith(self.pending_dir):
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try:
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os.remove(path)
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except Exception as e:
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print(f"删除待学习图片失败: {e}")
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del self._items[idx]
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self._save()
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return True
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return False
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def clear_all(self):
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with self.lock:
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for item in self._items:
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path = item.get("image_path")
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if path and os.path.exists(path) and path.startswith(self.pending_dir):
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try:
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os.remove(path)
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except Exception:
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pass
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self._items = []
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self._next_id = 1
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self._save()
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