# OCR 识别路由 - 专业人民币生肖纪念钞鉴定 import os import base64 import httpx from fastapi import APIRouter, Depends, HTTPException, UploadFile, File from sqlalchemy.orm import Session from app.core.database import get_db from app.core.auth import get_current_user from app.models.models import User router = APIRouter(prefix="/api/ocr", tags=["OCR 识别"]) # 阿里云 DashScope API 配置 DASHSCOPE_API_KEY = os.getenv("DASHSCOPE_API_KEY", "sk-9389024a37da4f7bb455ac9a6b28776f") # 专业提示词 PROFESSIONAL_PROMPT = """你是一名专业的人民币生肖纪念钞鉴定专家。请严格按照以下步骤分析这张图片,并提取准确信息。 【识别流程】 1. 判断类型是否评级钞:首先确认是否为裸钞还是评级钞(有封装盒和标签) 2. 验证纪念钞特征:对照生肖纪念钞特征进行确认 3. 验证评级类型:有'标十'字眼的为标十,有'百连'字眼的为标百,其他为单张 4. 提取信息:仔细阅读标签上的所有文字内容 【版别格式要求】 只需要:年份 + 属相,例如: - 2024 龙 - 2025 蛇 - 2026 马 【输出要求】 严格按照以下格式输出,每个字段必须填写具体值: ✅ 1 发行机构:中国人民银行 ✅ 2 发行版别:2024 龙 ✅ 3 面额:贰拾圆 ✅ 4 是否评级:是/否 ✅ 5 封装类型:裸钞/单张/标十/标百 ✅ 6 冠字序号:J0xxxxxxxx ✅ 7 评级机构:ACG/PCGS/PMG ✅ 8 评级分数:67/68/69 ✅ 9 是否三星:是/否 ✅ 10 特殊标识:金山标/天马标/红绳版等 ✅ 11 号码特征:金山号 2 张,天马号 3 张等 现在请仔细分析提供的图片,按上述格式输出结果。""" @router.post("/recognize") async def recognize_image( image: UploadFile = File(...), current_user: User = Depends(get_current_user), db: Session = Depends(get_db) ): """OCR 图片识别""" try: image_data = await image.read() image_base64 = base64.b64encode(image_data).decode('utf-8') headers = { "Authorization": f"Bearer {DASHSCOPE_API_KEY}", "Content-Type": "application/json" } # 阿里云 DashScope API 格式 (qwen-vl-max 视觉模型) payload = { "model": "qwen-vl-max", "messages": [{ "role": "user", "content": [ { "type": "image_url", "image_url": { "url": f"data:image/jpeg;base64,{image_base64}" } }, { "type": "text", "text": PROFESSIONAL_PROMPT } ] }], "max_tokens": 1000 } async with httpx.AsyncClient(timeout=60.0) as client: response = await client.post( "https://dashscope.aliyuncs.com/compatible-mode/v1/chat/completions", json=payload, headers=headers ) if response.status_code != 200: raise HTTPException(status_code=500, detail=f"OCR API 调用失败:{response.text[:200]}") ocr_result = response.json() text_content = "" if "choices" in ocr_result and len(ocr_result["choices"]) > 0: text_content = ocr_result["choices"][0]["message"]["content"] fields = extract_fields(text_content) # 调试日志:打印提取的字段 import logging logging.info(f"OCR 提取的字段:{fields}") return {"success": True, "text": text_content, "fields": fields} except Exception as e: raise HTTPException(status_code=500, detail=f"识别失败:{str(e)}") def extract_fields(text: str) -> dict: """从 OCR 文本中提取字段 - 直接返回 AI 识别结果""" import re fields = {} # 解析结构化输出 patterns = { 'issuer': r'✅.*?1.*?发行机构.*?[::]\s*(.+?)(?:\n|$)', 'version': r'✅.*?2.*?发行版别.*?[::]\s*(.+?)(?:\n|$)', 'denomination': r'✅.*?3.*?面额.*?[::]\s*(.+?)(?:\n|$)', 'is_graded_text': r'✅.*?4.*?是否评级.*?[::]\s*(.+?)(?:\n|$)', 'packaging': r'✅.*?5.*?封装类型.*?[::]\s*(.+?)(?:\n|$)', 'prefix_serial': r'✅.*?6.*?冠字序号.*?[::]\s*(.+?)(?:\n|$)', 'grading_company': r'✅.*?7.*?评级机构.*?[::]\s*(.+?)(?:\n|$)', 'grading_score': r'✅.*?8.*?评级分数.*?[::]\s*(.+?)(?:\n|$)', 'three_star_text': r'✅.*?9.*?是否三星.*?[::]\s*(.+?)(?:\n|$)', 'special_mark': r'✅.*?10.*?特殊标识.*?[::]\s*(.+?)(?:\n|$)', 'serial_feature': r'✅.*?11.*?号码特征.*?[::]\s*(.+?)(?:\n|$)' } for field, pattern in patterns.items(): match = re.search(pattern, text, re.IGNORECASE | re.DOTALL) if match: value = match.group(1).strip() # 保留所有值,包括"无"和"未识别",让前端处理 fields[field] = value # 处理是否评级 if 'is_graded_text' in fields: fields['is_graded'] = '是' in fields.pop('is_graded_text') # 处理是否三星 if 'three_star_text' in fields: fields['three_star'] = '是' in fields.pop('three_star_text') # 简化版别字段(2024 龙年贺岁纪念钞(标十) → 2024 龙) if 'version' in fields: version = fields['version'] # 提取年份和生肖 year_match = re.search(r'(20\d{2})', version) animal = '' if '龙' in version: animal = '龙' elif '蛇' in version: animal = '蛇' elif '马' in version: animal = '马' elif '羊' in version: animal = '羊' elif '猴' in version: animal = '猴' elif '鸡' in version: animal = '鸡' elif '狗' in version: animal = '狗' elif '猪' in version: animal = '猪' elif '鼠' in version: animal = '鼠' elif '牛' in version: animal = '牛' elif '虎' in version: animal = '虎' elif '兔' in version: animal = '兔' if year_match and animal: fields['version'] = f"{year_match.group(1)}{animal}" return fields