145 lines
4.8 KiB
Python
145 lines
4.8 KiB
Python
import cv2
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import numpy as np
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import insightface
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from insightface.app import FaceAnalysis
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from io import BytesIO
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from PIL import Image
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# 全局变量存储InsightFace引擎和特征列表
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_insightface_app = None
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_feature_list = []
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def init_insightface():
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"""初始化InsightFace引擎"""
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global _insightface_app
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try:
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print("正在初始化InsightFace引擎...")
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app = FaceAnalysis(name='buffalo_l', root='~/.insightface')
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app.prepare(ctx_id=0, det_size=(640, 640))
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print("InsightFace引擎初始化完成")
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_insightface_app = app
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return app
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except Exception as e:
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print(f"InsightFace初始化失败: {e}")
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return None
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def add_binary_data(binary_data):
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"""
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接收单张图片的二进制数据、提取特征并保存
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参数:
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binary_data: 图片的二进制数据（bytes类型）
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返回:
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成功提取特征时返回 (True, 特征值numpy数组)
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失败时返回 (False, None)
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"""
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global _insightface_app, _feature_list
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if not _insightface_app:
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print("引擎未初始化、无法处理")
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return False, None
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try:
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# 直接处理二进制数据: 转换为图像格式
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img = Image.open(BytesIO(binary_data))
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frame = cv2.cvtColor(np.array(img), cv2.COLOR_RGB2BGR)
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# 提取特征
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faces = _insightface_app.get(frame)
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if faces:
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# 获取当前提取的特征值
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current_feature = faces[0].embedding
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# 添加到特征列表
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_feature_list.append(current_feature)
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print(f"已累计 {len(_feature_list)} 个特征")
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# 返回成功标志和当前特征值
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return True, current_feature
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else:
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print("二进制数据中未检测到人脸")
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return False, None
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except Exception as e:
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print(f"处理二进制数据出错: {e}")
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return False, None
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def get_average_feature(features=None):
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"""
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计算多个特征向量的平均值
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参数:
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features: 可选、特征值列表。如果未提供、则使用全局存储的_feature_list
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每个元素可以是字符串格式或numpy数组
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返回:
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单一平均特征向量的numpy数组、若无可计算数据则返回None
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"""
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global _feature_list
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# 如果未提供features参数、则使用全局特征列表
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if features is None:
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features = _feature_list
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try:
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# 验证输入是否为列表且不为空
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if not isinstance(features, list) or len(features) == 0:
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print("输入必须是包含至少一个特征值的列表")
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return None
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# 处理每个特征值
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processed_features = []
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for i, embedding in enumerate(features):
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try:
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if isinstance(embedding, str):
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# 处理包含括号和逗号的字符串格式
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embedding_str = embedding.replace('[', '').replace(']', '').replace(',', ' ').strip()
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embedding_list = [float(num) for num in embedding_str.split() if num.strip()]
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embedding_np = np.array(embedding_list, dtype=np.float32)
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else:
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embedding_np = np.array(embedding, dtype=np.float32)
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# 验证特征值格式
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if len(embedding_np.shape) == 1:
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processed_features.append(embedding_np)
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print(f"已添加第 {i + 1} 个特征值用于计算平均值")
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else:
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print(f"跳过第 {i + 1} 个特征值、不是一维数组")
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except Exception as e:
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print(f"处理第 {i + 1} 个特征值时出错: {e}")
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# 确保有有效的特征值
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if not processed_features:
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print("没有有效的特征值用于计算平均值")
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return None
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# 检查所有特征向量维度是否相同
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dims = {feat.shape[0] for feat in processed_features}
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if len(dims) > 1:
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print(f"特征值维度不一致、无法计算平均值。检测到的维度: {dims}")
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return None
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# 计算平均值
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avg_feature = np.mean(processed_features, axis=0)
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print(f"成功计算 {len(processed_features)} 个特征值的平均特征向量、维度: {avg_feature.shape[0]}")
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return avg_feature
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except Exception as e:
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print(f"计算平均特征值时出错: {e}")
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return None
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def clear_features():
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"""清空已存储的特征数据"""
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global _feature_list
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_feature_list = []
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print("已清空所有特征数据")
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def get_feature_list():
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"""获取当前存储的特征列表"""
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global _feature_list
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return _feature_list.copy() # 返回副本防止外部直接修改 |